Central Thesaurus
Taxon Search
Taxon:
Display authors
Match on whole words
Display full tree below family
Display species with subgenera
Organism
  Plantae
   Viridiplantae
     Streptophyta
     Embryophyta
      Tracheophyta
        Spermatophytina
            Magnoliopsida
                  Asteranae
                    Lamiales
                           [Callitrichales]
                           [Plantaginales]
                           [Scrophulariales]
                            Plantaginaceae
                                   [Callitrichaceae]
                                   [Globulariaceae]
                                   [Hippuridaceae]
                                     Achetaria
                                             Achetaria platychila
                                                   [Otacanthus platychilus]
                                     Allophyton
                                     Amphianthus
                                     Anarrhinum
                                             Anarrhinum bellidifolium
                                     Angelonia
                                             Angelonia angustifolia
                                             Angelonia biflora
                                                   [Angelonia grandiflora]
                                             Angelonia ciliaris
                                             Angelonia cornigera
                                             Angelonia crassifolia
                                             Angelonia gardneri
                                             Angelonia hassleriana
                                             Angelonia integerrima
                                             Angelonia pratensis
                                             Angelonia salicariifolia
                                     Antirrhinum
                                           [Mohavea]
                                             Antirrhinum bellidifolium
                                             Antirrhinum braun-blanquetii
                                             Antirrhinum confertiflorum
                                                   [Mohavea confertiflora]
                                                   [Mohavea viscida]
                                             Antirrhinum cornutum
                                                   [Antirrhinum emarginatum]
                                                   [Sairocarpus cornutus]
                                             Antirrhinum costatum
                                             Antirrhinum coulterianum
                                                   [Sairocarpus coulterianus]
                                             Antirrhinum filipes
                                                   [Asarina filipes]
                                                   [Neogaerrhinum filipes]
                                             Antirrhinum hispanicum
                                               Antirrhinum hispanicum subsp. mollissimum
                                             Antirrhinum kelloggii
                                                   [Neogaerrhinum kelloggii]
                                                   [Neogaerrhinum strictum]
                                             Antirrhinum kingii
                                                   [Sairocarpus kingii]
                                             Antirrhinum leptaleum
                                                   [Antirrhinum cornutum var. leptaleum]
                                             Antirrhinum litigiosum
                                                   [Antirrhinum barrelieri]
                                             Antirrhinum majus
                                             Antirrhinum meonanthum
                                             Antirrhinum mohavea
                                                   [Mohavea breviflora]
                                             Antirrhinum molle
                                             Antirrhinum nuttallianum
                                                   [Sairocarpus nuttallianus]
                                                   [Sairocarpus pusillus]
                                               Antirrhinum nuttallianum subsp. nuttallianum
                                               Antirrhinum nuttallianum subsp. subsessile
                                             Antirrhinum orontium
                                                   [Misopates orontium]
                                             Antirrhinum ovatum
                                                   [Howelliella ovata]
                                             Antirrhinum pulverulentum
                                             Antirrhinum pusillum
                                                   [Antirrhinum nuttallianum f. pusillum]
                                             Antirrhinum strictum
                                             Antirrhinum subcordatum
                                                   [Sairocarpus subcordatus]
                                             Antirrhinum thompsonii
                                                   [Antirrhinum glandulosum]
                                                   [Antirrhinum multiflorum]
                                                   [Sairocarpus multiflorus]
                                             Antirrhinum tortuosum
                                                   [Antirrhinum majus subsp. tortuosum]
                                             Antirrhinum vexillocalyculatum
                                                   [Antirrhinum vexillo-calyculatum]
                                                   [Sairocarpus elmeri]
                                                   [Sairocarpus vexillocalyculatus]
                                               Antirrhinum vexillocalyculatum subsp. breweri
                                                     [Antirrhinum breweri]
                                                     [Antirrhinum vagans var. breweri]
                                                     [Antirrhinum vexillo-calyculatum subsp. breweri]
                                                     [Antirrhinum vexillo-calyculatum var. breweri]
                                                     [Antirrhinum vexillocalyculatum var. breweri]
                                                     [Sairocarpus breweri]
                                               Antirrhinum vexillocalyculatum subsp. intermedium
                                                     [Antirrhinum vexillo-calyculatum subsp. intermedium]
                                               Antirrhinum vexillocalyculatum subsp. vexillocalyculatum
                                                     [Antirrhinum elmeri]
                                                     [Antirrhinum vagans]
                                                     [Antirrhinum vexillo-calyculatum subsp. vexillo-calyculatum]
                                                     [Antirrhinum vexillo-calyculatum]
                                                     [Antirrhinum vexillocalyculatum var. vexillocalyculatum]
                                             Antirrhinum virga
                                                   [Sairocarpus virga]
                                     Aragoa
                                             Aragoa abietina
                                     Asarina
                                     Bacopa
                                             Bacopa axillaris
                                                   [Caconapea appressa]
                                             Bacopa caroliniana
                                                   [Hydrotrida caroliniana]
                                             Bacopa egensis
                                             Bacopa eisenii
                                                   [Herpestis eisenii]
                                                   [Monniera rotundifolia var. eisenii]
                                                   [Ranapalus eisenii]
                                             Bacopa floribunda
                                             Bacopa innominata
                                                   [Bacopa cyclophylla]
                                                   [Bacopa stragula]
                                                   [Herpestis rotundifolia]
                                             Bacopa lacertosa
                                             Bacopa lanigera
                                             Bacopa monnieri
                                                   [Bramia monnieri]
                                                   [Gratiola monnieri]
                                                   [Herpestis monnieri]
                                                   [Lysimachia monnieri]
                                             Bacopa monnierioides
                                                   [Bacopa parviflora]
                                             Bacopa myriophylloides
                                             Bacopa repens
                                                   [Gratiola repens]
                                                   [Herpestis repens]
                                                   [Hydranthelium repens]
                                                   [Macuillamia obovata]
                                                   [Macuillamia repens]
                                             Bacopa rotundifolia
                                                   [Bacopa nobsiana]
                                                   [Bacopa simulans]
                                                   [Bramia rotundifolia]
                                                   [Hydranthelium rotundifolium]
                                                   [Macuillamia limosa]
                                                   [Macuillamia rotundifolia]
                                                   [Monniera rotundifolia]
                                                   [Ranapalus rotundifolius]
                                             Bacopa salzmannii
                                             Bacopa sessiliflora
                                                   [Caconapea conferta]
                                             Bacopa stricta
                                                   [Caconapea stricta]
                                             Bacopa valerii
                                     Basistemon
                                             Basistemon spinosus
                                                   [Hassleropsis spinosa]
                                     Botryopleuron
                                     Bramia
                                     Braunblanquetia
                                     Caconapea
                                     Callitriche
                                             Callitriche brutia
                                               Callitriche brutia var. hamulata
                                                     [Callitriche hamulata]
                                                     [Callitriche intermedia subsp. hamulata]
                                                     [Callitriche intermedia subsp. intermedia]
                                                     [Callitriche intermedia]
                                             Callitriche cophocarpa
                                             Callitriche fassettii
                                             Callitriche fuscicarpa
                                             Callitriche hermaphroditica
                                                   [Callitriche autumnalis var. bicarpellaris]
                                                   [Callitriche autumnalis]
                                             Callitriche heterophylla
                                               Callitriche heterophylla var. bolanderi
                                                     [Callitriche bolanderi]
                                                     [Callitriche heterophylla subsp. bolanderi]
                                                     [Callitriche palustris var. bolanderi]
                                               Callitriche heterophylla var. heterophylla
                                                     [Callitriche anceps]
                                                     [Callitriche heterophylla subsp. heterophylla]
                                             Callitriche longipedunculata
                                                   [Callitriche marginata var. longipedunculata]
                                             Callitriche marginata
                                                   [Callitriche sepulta]
                                               Callitriche marginata var. marginata
                                             Callitriche palustris
                                                   [Callitriche palustris var. verna]
                                                   [Callitriche verna]
                                               Callitriche palustris subsp. palustris
                                                     [Callitriche stenocarpa]
                                             Callitriche pedunculosa
                                                   [Callitriche nuttallii]
                                             Callitriche peploides
                                               Callitriche peploides var. peploides
                                               Callitriche peploides var. semialata
                                             Callitriche stagnalis
                                                   [Callitriche palustris subsp. stagnalis]
                                             Callitriche stenoptera
                                             Callitriche terrestris
                                                   [Callitriche austinii]
                                                   [Callitriche deflexa var. austinii]
                                                   [Callitriche deflexa var. subsessilis]
                                                   [Callitriche deflexa]
                                             Callitriche trochlearis
                                     Chaenorhinum
                                           [Chaenarrhinum]
                                           [Chaenorrhinum]
                                             Chaenorhinum calycinum
                                                   [Antirrhinum calycinum]
                                             Chaenorhinum minus
                                                   [Chaenorrhinum minus]
                                               Chaenorhinum minus subsp. minus
                                                     [Linaria minor]
                                             Chaenorhinum origanifolium
                                               Chaenorhinum origanifolium subsp. origanifolium
                                                     [Linaria origanifolia]
                                     Chelone
                                             Chelone cuthbertii
                                                   [Chelone grimesii]
                                             Chelone glabra
                                                   [Chelone chlorantha]
                                                   [Chelone glabra var. chlorantha]
                                                   [Chelone glabra var. dilatata]
                                                   [Chelone glabra var. elatior]
                                                   [Chelone glabra var. elongata]
                                                   [Chelone glabra var. glabra]
                                                   [Chelone glabra var. linifolia]
                                                   [Chelone glabra var. ochroleuca]
                                                   [Chelone glabra var. typica]
                                                   [Chelone montana]
                                             Chelone lyonii
                                             Chelone obliqua
                                               Chelone obliqua var. erwiniae
                                               Chelone obliqua var. obliqua
                                               Chelone obliqua var. speciosa
                              Chelonoideae
                                     Chionohebe
                                     Chionophila
                                             Chionophila jamesii
                                             Chionophila tweedyi
                                     Collinsia
                                             Collinsia antonina
                                                   [Collinsia antonina subsp. antonina]
                                                   [Collinsia antonina subsp. purpurea]
                                             Collinsia bartsiifolia
                                                   [Collinsia bartsiaefolia]
                                               Collinsia bartsiifolia var. alba
                                               Collinsia bartsiifolia var. bartsiifolia
                                                     [Collinsia bartsiaefolia var. bartsiaefolia]
                                                     [Collinsia bartsiaefolia var. typica]
                                                     [Collinsia bartsiifolia var. typica]
                                               Collinsia bartsiifolia var. davidsonii
                                                     [Collinsia bartsiaefolia var. davidsonii]
                                                     [Collinsia davidsonii]
                                               Collinsia bartsiifolia var. hirsuta
                                                     [Collinsia bartsiaefolia var. hirsuta]
                                               Collinsia bartsiifolia var. stricta
                                                     [Collinsia bartsiaefolia var. stricta]
                                                     [Collinsia stricta]
                                             Collinsia callosa
                                             Collinsia childii
                                                   [Collinsia breviflora]
                                             Collinsia concolor
                                                   [Collinsia bicolor var. concolor]
                                             Collinsia corymbosa
                                             Collinsia divaricata
                                             Collinsia grandiflora
                                                   [Collinsia grandiflora var. pusilla]
                                                   [Collinsia parviflora var. grandiflora]
                                             Collinsia greenei
                                             Collinsia heterophylla
                                                   [Collinsia bicolor]
                                               Collinsia heterophylla var. austromontana
                                                     [Collinsia austromontana]
                                                     [Collinsia bicolor var. austromontana]
                                               Collinsia heterophylla var. heterophylla
                                             Collinsia latifolia
                                             Collinsia linearis
                                                   [Collinsia rattanii var. linearis]
                                                   [Collinsia torreyi var. linearis]
                                             Collinsia multicolor
                                                   [Collinsia bicolor var. multicolor]
                                                   [Collinsia franciscana]
                                             Collinsia multiflora
                                             Collinsia parryi
                                                   [Collinsia cahonis]
                                             Collinsia parviflora
                                                   [Antirrhinum tenellum]
                                                   [Collinsia diehlii]
                                                   [Collinsia grandiflora var. pusilla]
                                                   [Collinsia parviflora var. parviflora]
                                                   [Collinsia tenella]
                                             Collinsia rattanii
                                                   [Collinsia glandulosa]
                                                   [Collinsia rattani]
                                                   [Collinsia rattanii subsp. rattanii]
                                                   [Collinsia rattanii var. typica]
                                                   [Collinsia torreyi var. rattanii]
                                               Collinsia rattanii subsp. glandulosa
                                               Collinsia rattanii subsp. rattanii
                                             Collinsia sparsiflora
                                                   [Collinsia arvensis]
                                               Collinsia sparsiflora var. bruceae
                                                     [Collinsia bruceae]
                                               Collinsia sparsiflora var. collina
                                                     [Collinsia parviflora var. collina]
                                               Collinsia sparsiflora var. solitaria
                                                     [Collinsia solitaria]
                                               Collinsia sparsiflora var. sparsiflora
                                                     [Collinsia parviflora var. sparsiflora]
                                                     [Collinsia sparsiflora var. arvensis]
                                             Collinsia tinctoria
                                                   [Collinsia barbata]
                                             Collinsia torreyi
                                               Collinsia torreyi var. brevicarinata
                                               Collinsia torreyi var. latifolia
                                               Collinsia torreyi var. torreyi
                                                     [Collinsia torreyi var. typica]
                                               Collinsia torreyi var. wrightii
                                                     [Collinsia monticola]
                                                     [Collinsia wrightii]
                                             Collinsia verna
                                             Collinsia violacea
                                     Conobea
                                             Conobea aquatica
                                             Conobea scoparioides
                                     Cymbalaria
                                             Cymbalaria muralis
                                                   [Linaria cymbalaria]
                                     Darcya
                                             Darcya costaricensis
                                                   [Stemodia costaricensis]
                              Digitalidoideae
                                     Digitalis
                                             Digitalis canariensis
                                                   [Isoplexis canariensis]
                                             Digitalis ferruginea
                                             Digitalis grandiflora
                                                   [Digitalis ambigua]
                                                   [Digitalis orientalis]
                                             Digitalis isabelliana
                                                   [Isoplexis isabelliana]
                                             Digitalis lanata
                                             Digitalis lutea
                                             Digitalis mariana
                                               Digitalis mariana subsp. heywoodii
                                                     [Digitalis purpurea subsp. heywoodii]
                                             Digitalis obscura
                                             Digitalis purpurea
                                                   [Digitalis purpurea var. alba]
                                                   [Digitalis purpurea var. purpurea]
                                               Digitalis purpurea subsp. amandiana
                                                     [Digitalis purpurea var. amandiana]
                                               Digitalis purpurea subsp. purpurea
                                                     [Digitalis purpurea var. purpurea]
                                                     [Digitalis purpurea var. tomentosa]
                                             Digitalis sceptrum
                                                   [Isoplexis sceptrum]
                                     Dopatrium
                                             Dopatrium acutifolium
                                             Dopatrium junceum
                                                   [Gratiola juncea]
                                     Elatinoides
                                     Ellisiophyllum
                                             Ellisiophyllum pinnatum
                                     Epixiphium
                                             Epixiphium wislizeni
                                                   [Antirrhinum wislizeni]
                                                   [Asarina wislizeni]
                                                   [Maurandya wislizeni]
                                                   [Maurandya wislizenii]
                                     Erinus
                                             Erinus alpinus
                                     Fonkia
                                             Fonkia uliginosa
                                                   [Braunblanquetia littoralis]
                                     Galvesia
                                     Galvezia
                                             Galvezia ballii
                                             Galvezia fruticosa
                                             Galvezia leucantha
                                               Galvezia leucantha subsp. porphyrantha
                                     Gambelia
                                             Gambelia glabrata
                                                   [Galvezia glabrata]
                                             Gambelia juncea
                                                   [Galvezia juncea var. foliosa]
                                                   [Galvezia juncea var. juncea]
                                                   [Galvezia juncea var. pubescens]
                                                   [Galvezia juncea]
                                             Gambelia rupicola
                                                   [Galvezia rupicola]
                                             Gambelia speciosa
                                                   [Antirrhinum speciosum]
                                                   [Galvesia speciosa]
                                                   [Galvezia speciosa]
                                     Globifera
                                     Globularia
                                             Globularia alypum
                                             Globularia bisnagarica
                                                   [Globularia elongata]
                                                   [Globularia punctata]
                                             Globularia cordifolia
                                             Globularia davisiana
                                             Globularia nudicaulis
                                             Globularia salicina
                              Globularioideae
                                     Gratiola
                                             Gratiola amphiantha
                                                   [Amphianthus pusillus]
                                             Gratiola aurea
                                                   [Gratiola aurea var. obtusa]
                                                   [Gratiola lutea]
                                             Gratiola brevifolia
                                             Gratiola ebracteata
                                             Gratiola flava
                                             Gratiola floridana
                                             Gratiola graniticola
                                             Gratiola heterosepala
                                             Gratiola hispida
                                                   [Gratiola subulata]
                                                   [Sophronanthe hispida]
                                             Gratiola neglecta
                                                   [Gratiola neglecta var. glaberrima]
                                               Gratiola neglecta var. neglecta
                                             Gratiola officinalis
                                             Gratiola oresbia
                                             Gratiola pilosa
                                                   [Gratiola pilosa var. epilis]
                                                   [Sophronanthe pilosa]
                                                   [Tragiola pilosa subsp. epilis]
                                                   [Tragiola pilosa]
                                             Gratiola quartermaniae
                                             Gratiola ramosa
                                                   [Gratiola drummondii]
                                             Gratiola virginiana
                                               Gratiola virginiana var. aestuariorum
                                               Gratiola virginiana var. virginiana
                                                     [Gratiola sphaerocarpa]
                                             Gratiola viscidula
                                                   [Gratiola viscidula subsp. shortii]
                                                   [Gratiola viscidula subsp. viscidula]
                                                   [Gratiola viscidula var. shortii]
                                                   [Gratiola viscosa]
                              Gratioloideae
                                     Adenosma
                                             Adenosma indianum
                                     Hassleropsis
                                     Hebe
                                             Hebe X franciscana
                                                   [Hebe franciscana]
                                             Hebe angustifolia
                                             Hebe speciosa
                                                   [Veronica speciosa]
                                             Hebe venustula
                                             Hebe × franciscana
                                                   [Veronica decussata]
                                                   [Veronica franciscana]
                                     Hemiphragma
                                             Hemiphragma heterophyllum
                                     Herpestis
                                     Hippuris
                                             Hippuris lanceolata
                                             Hippuris montana
                                             Hippuris tetraphylla
                                             Hippuris vulgaris
                                     Holmgrenanthe
                                             Holmgrenanthe petrophila
                                                   [Asarina petrophila]
                                                   [Maurandella petrophila]
                                                   [Maurandya petrophila]
                                     Howelliella
                                     Hydranthelium
                                     Hydrotrida
                                     Isoplexis
                                     Keckia
                                     Keckiella
                                             Keckiella antirrhinoides
                                                   [Keckia antirrhinoides]
                                                   [Penstemon antirrhinoides]
                                               Keckiella antirrhinoides var. antirrhinoides
                                                     [Keckiella antirrhinoides subsp. antirrhinoides]
                                                     [Penstemon antirrhinoides subsp. antirrhinoides]
                                                     [Penstemon antirrhinoides var. antirrhinoides]
                                                     [Penstemon antirrhinoides]
                                               Keckiella antirrhinoides var. microphylla
                                                     [Keckiella antirrhinoides subsp. microphylla]
                                                     [Penstemon antirrhinoides subsp. microphyllus]
                                                     [Penstemon antirrhinoides var. microphyllus]
                                                     [Penstemon microphyllus]
                                             Keckiella breviflora
                                                   [Keckia breviflora]
                                                   [Penstemon breviflorus]
                                               Keckiella breviflora var. breviflora
                                                     [Keckiella breviflora subsp. breviflora]
                                                     [Penstemon breviflorus subsp. breviflorus]
                                                     [Penstemon breviflorus]
                                               Keckiella breviflora var. glabrisepala
                                                     [Keckiella breviflora subsp. glabrisepala]
                                                     [Penstemon breviflorus subsp. glabrisepalus]
                                             Keckiella cordifolia
                                                   [Keckia cordifolia]
                                                   [Penstemon cordifolius]
                                             Keckiella corymbosa
                                                   [Keckia corymbosa]
                                                   [Penstemon corymbosus var. puberulentus]
                                                   [Penstemon corymbosus]
                                                   [Penstemon intonsus]
                                             Keckiella lemmonii
                                                   [Keckia lemmonii]
                                                   [Penstemon lemmonii]
                                             Keckiella rothrockii
                                                   [Keckia rothrockii]
                                                   [Penstemon rothrockii]
                                                   [Penstemon scabridus]
                                                   [Penstemon shockleyi]
                                               Keckiella rothrockii var. jacintensis
                                                     [Keckiella rothrockii subsp. jacintensis]
                                                     [Penstemon jacintensis]
                                                     [Penstemon rothrockii subsp. jacintensis]
                                                     [Penstemon rothrockii var. jacintensis]
                                               Keckiella rothrockii var. rothrockii
                                                     [Keckiella rothrockii subsp. rothrockii]
                                                     [Penstemon rothrockii]
                                             Keckiella ternata
                                                   [Keckia ternata]
                                                   [Penstemon ternatus]
                                               Keckiella ternata var. septentrionalis
                                                     [Keckiella ternata subsp. septentrionalis]
                                                     [Penstemon ternatus subsp. septentrionalis]
                                                     [Penstemon ternatus var. septentrionalis]
                                               Keckiella ternata var. ternata
                                                     [Keckiella ternata subsp. ternata]
                                                     [Penstemon ternatus subsp. ternatus]
                                                     [Penstemon ternatus]
                                     Kicksia
                                     Kickxia
                                             Kickxia commutata
                                               Kickxia commutata subsp. commutata
                                                     [Linaria commutata]
                                             Kickxia elatine
                                                   [Antirrhinum elatine]
                                                   [Elatinoides elatine]
                                                   [Kicksia elatine]
                                                   [Linaria elatine]
                                                   [Tursitis elatine]
                                             Kickxia spuria
                                                   [Antirrhinum spurium]
                                                   [Kicksia spuria]
                                                   [Linaria spuria]
                                               Kickxia spuria subsp. integrifolia
                                     Lagotis
                                             Lagotis decumbens
                                             Lagotis glauca
                                               Lagotis glauca subsp. glauca
                                                     [Lagotis glauca var. glauca]
                                               Lagotis glauca subsp. lanceolata
                                                     [Lagotis glauca subsp. minor]
                                                     [Lagotis glauca var. stelleri]
                                                     [Lagotis minor]
                                                     [Lagotis stelleri]
                                     Leiostemon
                                     Leptandra
                                     Leucospora
                                             Leucospora multifida
                                                   [Conobea multifida]
                                     Limnophila
                                             Limnophila X ludoviciana
                                                   [Limnophila ludoviciana]
                                             Limnophila aquatica
                                             Limnophila aromatica
                                                   [Limnophila punctata]
                                             Limnophila chinensis
                                             Limnophila connata
                                             Limnophila fragrans
                                             Limnophila indica
                                                   [Hottonia indica]
                                                   [Limnophila benthamiana]
                                             Limnophila ludoviciana
                                             Limnophila sessiliflora
                                             Limnophila × ludoviciana
                                     Limosella
                                             Limosella acaulis
                                             Limosella aquatica
                                             Limosella australis
                                                   [Limosella aquatica var. tenuifolia]
                                                   [Limosella subulata]
                                             Limosella pubiflora
                                     Linaria
                                             Linaria aeruginea
                                             Linaria alpina
                                             Linaria amethystea
                                             Linaria angustissima
                                                   [Linaria italica]
                                             Linaria arenicola
                                             Linaria armeniaca
                                                   [Linaria calcarata]
                                             Linaria arvensis
                                             Linaria bipartita
                                                   [Antirrhinum bipartitum]
                                             Linaria bipunctata
                                               Linaria bipunctata subsp. bipunctata
                                                     [Linaria filifolia]
                                             Linaria caesia
                                             Linaria clementei
                                             Linaria dalmatica
                                               Linaria dalmatica subsp. dalmatica
                                                     [Linaria dalmatica var. dalmatica]
                                                     [Linaria genistifolia subsp. dalmatica]
                                                     [Linaria jattae]
                                               Linaria dalmatica subsp. macedonica
                                                     [Linaria dalmatica var. macedonica]
                                                     [Linaria macedonica]
                                             Linaria genistifolia
                                               Linaria genistifolia subsp. genistifolia
                                                     [Linaria genistifolia var. genistifolia]
                                             Linaria glauca
                                             Linaria granidflora
                                             Linaria hirta
                                             Linaria incarnata
                                             Linaria kurdica
                                             Linaria longicalcarata
                                             Linaria maroccana
                                             Linaria microsepala
                                             Linaria nivea
                                             Linaria pelisseriana
                                             Linaria pinifolia
                                                   [Antirrhinum pinifolium]
                                                   [Antirrhinum reticulatum]
                                                   [Linaria reticulata]
                                             Linaria propinqua
                                             Linaria purpurea
                                                   [Antirrhinum purpureum]
                                             Linaria repens
                                             Linaria saxatilis
                                             Linaria spartea
                                             Linaria supina
                                                   [Antirrhinum supinum]
                                               Linaria supina subsp. supina
                                             Linaria triornithophora
                                             Linaria virgata
                                             Linaria viscosa
                                             Linaria vulgaris
                                                   [Linaria linaria]
                                             Linaria × hybrida
                                             Linaria × sepium
                                     Littorella
                                             Littorella uniflora
                                                   [Littorella americana]
                                                   [Littorella uniflora var. americana]
                                     Lophospermum
                                             Lophospermum breedlovei
                                             Lophospermum erectum
                                                   [Mabrya erecta]
                                             Lophospermum erubescens
                                                   [Asarina erubescens]
                                                   [Lophospermum scandens]
                                                   [Lophospermum turneri]
                                                   [Maurandya erubescens]
                                                   [Maurandya purpusii]
                                             Lophospermum physalodes
                                                   [Melasma physalodes]
                                     Mabrya
                                             Mabrya acerifolia
                                                   [Asarina acerifolia]
                                                   [Maurandya acerifolia]
                                             Mabrya flaviflora
                                                   [Asarina flaviflora]
                                                   [Maurandya flaviflora]
                                             Mabrya geniculata
                                               Mabrya geniculata subsp. geniculata
                                     Macuillamia
                                     Maurandella
                                             Maurandella antirrhiniflora
                                                   [Antirrhinum antirrhiniflorum]
                                                   [Antirrhinum maurandioides]
                                                   [Asarina antirrhiniflora]
                                                   [Maurandya antirrhiniflora subsp. antirrhiniflora]
                                                   [Maurandya antirrhiniflora]
                                                   [Usteria antirrhiniflora]
                                     Maurandya
                                             Maurandya barclaiana
                                             Maurandya scandens
                                     Mecardonia
                                             Mecardonia acuminata
                                               Mecardonia acuminata var. acuminata
                                                     [Bacopa acuminata]
                                                     [Pagesia acuminata]
                                               Mecardonia acuminata var. microphylla
                                                     [Bacopa acuminata var. microphylla]
                                               Mecardonia acuminata var. peninsularis
                                             Mecardonia exilis
                                                   [Herpestis exilis]
                                             Mecardonia procumbens
                                                   [Bacopa procumbens]
                                                   [Herpestis macrantha]
                                                   [Mecardonia dianthera]
                                                   [Mecardonia peduncularis]
                                                   [Mecardonia tenuis]
                                                   [Mecardonia vandellioides]
                                     Melosperma
                                             Melosperma andicola
                                     Micranthemum
                                           [Hemianthus]
                                             Micranthemum bryoides
                                             Micranthemum callitrichoides
                                                   [Micranthemum adenander]
                                             Micranthemum glomeratum
                                                   [Hemianthus glomeratus]
                                             Micranthemum micranthemoides
                                                   [Hemianthus micranthemoides]
                                             Micranthemum reflexum
                                             Micranthemum umbrosum
                                                   [Globifera umbrosa]
                                                   [Hemianthus callitrichoides]
                                     Misopates
                                     Monniera
                                     Monopera
                                             Monopera micrantha
                                                   [Angelonia micrantha]
                                             Monopera perennis
                                                   [Angelonia micrantha var. perennis]
                                     Neogaerrhinum
                                             Neogaerrhinum strictum
                                                   [Antirrhinum hookerianum]
                                                   [Antirrhinum kelloggii]
                                                   [Asarina stricta]
                                                   [Maurandya stricta]
                                                   [Neogaerrhinum kelloggii]
                                     Nothochelone
                                             Nothochelone nemorosa
                                                   [Chelone nemorosa]
                                                   [Penstemon nemorosus]
                                     Nuttallanthus
                                             Nuttallanthus canadensis
                                                   [Antirrhinum canadense]
                                                   [Linaria canadensis var. canadensis]
                                                   [Linaria canadensis]
                                             Nuttallanthus floridanus
                                                   [Linaria floridana]
                                             Nuttallanthus texanus
                                                   [Linaria canadensis var. texana]
                                                   [Linaria texana]
                                     Otacanthus
                                     Pagesia
                                     Parahebe
                                     Penstemon
                                             Penstemon abietinus
                                             Penstemon absarokensis
                                             Penstemon acaulis
                                               Penstemon acaulis var. acaulis
                                             Penstemon acuminatus
                                               Penstemon acuminatus var. acuminatus
                                               Penstemon acuminatus var. latebracteatus
                                               Penstemon acuminatus var. latibracteatus
                                             Penstemon alamosensis
                                             Penstemon albertinus
                                                   [Penstemon caelestinus]
                                             Penstemon albidus
                                             Penstemon albomarginatus
                                             Penstemon ambiguus
                                               Penstemon ambiguus var. ambiguus
                                                     [Leiostemon ambiguus]
                                               Penstemon ambiguus var. laevissimus
                                                     [Penstemon ambiguus subsp. laevissimus]
                                             Penstemon ammophilus
                                                   [Penstemon ammophilum]
                                             Penstemon amphorellae
                                             Penstemon anguineus
                                                   [Penstemon minor]
                                                   [Penstemon rattanii var. minor]
                                             Penstemon angustifolius
                                               Penstemon angustifolius var. angustifolius
                                               Penstemon angustifolius var. caudatus
                                                     [Penstemon angustifolius subsp. caudatus]
                                                     [Penstemon caudatus]
                                               Penstemon angustifolius var. dulcis
                                               Penstemon angustifolius var. venosus
                                                     [Penstemon angustifolius subsp. venosus]
                                                     [Penstemon venosus]
                                               Penstemon angustifolius var. vernalensis
                                             Penstemon apateticus
                                               Penstemon apateticus subsp. apateticus
                                               Penstemon apateticus subsp. durangensis
                                             Penstemon arenarius
                                                   [Penstemon maguirei]
                                             Penstemon arenicola
                                             Penstemon aridus
                                             Penstemon arkansanus
                                                   [Penstemon multicaulis]
                                                   [Penstemon pallidus subsp. arkansanus]
                                                   [Penstemon wherryi]
                                             Penstemon attenuatus
                                                   [Penstemon attenuatus f. multicolor]
                                                   [Penstemon attenuatus subsp. hyacinthinus]
                                                   [Penstemon cephalanthus]
                                                   [Penstemon nelsoniae]
                                                   [Penstemon veronicifolius]
                                               Penstemon attenuatus subsp. attenuatus
                                               Penstemon attenuatus var. attenuatus
                                               Penstemon attenuatus var. militaris
                                                     [Penstemon assurgens]
                                                     [Penstemon attenuatus subsp. militaris]
                                               Penstemon attenuatus var. palustris
                                                     [Penstemon attenuatus subsp. palustris]
                                                     [Penstemon palustris]
                                               Penstemon attenuatus var. pseudoprocerus
                                                     [Penstemon attenuatus subsp. pseudoprocerus]
                                                     [Penstemon owenii]
                                                     [Penstemon propinquus]
                                                     [Penstemon pseudoprocerus]
                                             Penstemon atwoodii
                                             Penstemon auriberbis
                                                   [Penstemon parviflorus]
                                             Penstemon australis
                                                   [Penstemon australis subsp. australis]
                                             Penstemon azureus
                                                   [Penstemon glaucifolius]
                                               Penstemon azureus var. angustissimus
                                                     [Penstemon azureus subsp. angustissimus]
                                               Penstemon azureus var. azureus
                                                     [Penstemon azureus subsp. azureus]
                                                     [Penstemon heterophyllus var. azureus]
                                             Penstemon baccharifolius
                                             Penstemon barbatus
                                                   [Penstemon flaviflorus]
                                               Penstemon barbatus var. barbatus
                                                     [Penstemon barbatus subsp. barbatus]
                                                     [Penstemon barbatus var. puberulus]
                                               Penstemon barbatus var. torreyi
                                                     [Penstemon barbatus subsp. torreyi]
                                                     [Penstemon torreyi]
                                               Penstemon barbatus var. trichander
                                                     [Penstemon barbatus subsp. trichander]
                                                     [Penstemon barbatus var. trichanderi]
                                             Penstemon barnebyi
                                             Penstemon barrettiae
                                             Penstemon bicolor
                                                   [Penstemon bicolor subsp. bicolor]
                                                   [Penstemon bicolor subsp. roseus]
                                                   [Penstemon palmeri var. bicolor]
                                                   [Penstemon pseudospectabilis subsp. bicolor]
                                             Penstemon bracteatus
                                             Penstemon breviculus
                                                   [Penstemon jamesii subsp. breviculus]
                                             Penstemon brevisepalus
                                             Penstemon buckleyi
                                             Penstemon caesius
                                             Penstemon caespitosus
                                               Penstemon caespitosus subsp. caespitosus
                                               Penstemon caespitosus var. caespitosus
                                               Penstemon caespitosus var. desertipicti
                                                     [Penstemon caespitosus subsp. desertipicti]
                                               Penstemon caespitosus var. perbrevis
                                                     [Penstemon caespitosus subsp. perbrevis]
                                             Penstemon calcareus
                                                   [Penstemon desertorum]
                                             Penstemon californicus
                                                   [Penstemon linarioides var. californicus]
                                             Penstemon calycosus
                                                   [Penstemon laevigatus subsp. calycosus]
                                             Penstemon campanulatus
                                                   [Penstemon campanulatus f. pulchellus]
                                                   [Penstemon pulchellus]
                                               Penstemon campanulatus subsp. campanulatus
                                               Penstemon campanulatus var. campanulatus
                                               Penstemon campanulatus var. chihuahuensis
                                                     [Penstemon campanulatus subsp. chihuahuensis]
                                             Penstemon canescens
                                                   [Penstemon brittoniorum]
                                                   [Penstemon canescens subsp. brittoniorum]
                                                   [Penstemon canescens var. brittoniorum]
                                                   [Penstemon canescens var. typicus]
                                               Penstemon canescens subsp. canescens
                                             Penstemon cardinalis
                                               Penstemon cardinalis subsp. cardinalis
                                               Penstemon cardinalis subsp. regalis
                                             Penstemon cardwellii
                                             Penstemon carnosus
                                             Penstemon caryi
                                             Penstemon cedrosensis
                                             Penstemon centranthifolius
                                                   [Chelone centranthifolia]
                                             Penstemon cinicola
                                                   [Penstemon truncatus]
                                             Penstemon clevelandii
                                               Penstemon clevelandii var. clevelandii
                                                     [Penstemon clevelandii subsp. clevelandii]
                                               Penstemon clevelandii var. connatus
                                                     [Penstemon clevelandii subsp. connatus]
                                               Penstemon clevelandii var. mohavensis
                                                     [Penstemon clevelandii subsp. mohavensis]
                                             Penstemon clutei
                                             Penstemon cobaea
                                               Penstemon cobaea subsp. cobaea
                                               Penstemon cobaea var. cobaea
                                                     [Penstemon cobaea subsp. typicus]
                                               Penstemon cobaea var. purpureus
                                                     [Penstemon cobaea subsp. purpureus]
                                             Penstemon comarrhenus
                                             Penstemon compactus
                                                   [Penstemon cyananthus subsp. compactus]
                                                   [Penstemon cyananthus var. compactus]
                                             Penstemon concinnus
                                             Penstemon confertus
                                                   [Penstemon depressus]
                                                   [Penstemon lassenianus]
                                                   [Penstemon washoensis]
                                               Penstemon confertus subsp. confertus
                                             Penstemon confusus
                                             Penstemon crandallii
                                               Penstemon crandallii subsp. atratus
                                                     [Penstemon crandallii var. atractus]
                                                     [Penstemon crandallii var. atratus]
                                               Penstemon crandallii subsp. crandallii
                                                     [Penstemon suffrutescens]
                                               Penstemon crandallii subsp. glabrescens
                                                     [Penstemon crandallii subsp. taosensis]
                                                     [Penstemon crandallii var. glabrescens]
                                                     [Penstemon linarioides subsp. taosensis]
                                               Penstemon crandallii subsp. procumbens
                                               Penstemon crandallii var. crandallii
                                               Penstemon crandallii var. procumbens
                                                     [Penstemon procumbens]
                                               Penstemon crandallii var. ramaleyi
                                                     [Penstemon ramaleyi]
                                             Penstemon cusickii
                                                   [Penstemon macbridei]
                                             Penstemon cyananthus
                                               Penstemon cyananthus subsp. cyananthus
                                               Penstemon cyananthus var. cyananthus
                                               Penstemon cyananthus var. judyae
                                               Penstemon cyananthus var. subglaber
                                                     [Penstemon cyananthus subsp. subglaber]
                                                     [Penstemon holmgrenii]
                                             Penstemon cyaneus
                                             Penstemon cyanocaulis
                                             Penstemon cyathophorus
                                             Penstemon dasyphyllus
                                             Penstemon davidsonii
                                                   [Penstemon menziesii var. davidsonii]
                                               Penstemon davidsonii var. davidsonii
                                                     [Penstemon davidsonii subsp. davidsonii]
                                                     [Penstemon menziesii subsp. davidsonii]
                                                     [Penstemon menziesii subsp. thompsonii]
                                                     [Penstemon menziesii var. davidsonii]
                                               Penstemon davidsonii var. menziesii
                                                     [Penstemon davidsonii subsp. menziesii]
                                                     [Penstemon douglasii]
                                                     [Penstemon fruticosus var. douglasii]
                                                     [Penstemon menziesii]
                                               Penstemon davidsonii var. praeteritus
                                             Penstemon deamii
                                                   [Penstemon laevigatus subsp. deamii]
                                                   [Penstemon laevigatus var. deamii]
                                             Penstemon deaveri
                                                   [Penstemon arizonicus]
                                                   [Penstemon virgatus subsp. arizonicus]
                                             Penstemon debilis
                                             Penstemon degeneri
                                             Penstemon deustus
                                               Penstemon deustus var. deustus
                                                     [Penstemon deustus subsp. deustus]
                                               Penstemon deustus var. pedicellatus
                                                     [Penstemon deustus subsp. heterander]
                                                     [Penstemon deustus var. heterander]
                                                     [Penstemon heterander]
                                               Penstemon deustus var. suffrutescens
                                                     [Penstemon deustus var. savagei]
                                               Penstemon deustus var. variabilis
                                                     [Penstemon deustus subsp. variabilis]
                                                     [Penstemon variabilis]
                                             Penstemon digitalis
                                                   [Penstemon alluviorum]
                                                   [Penstemon laevigatus subsp. alluviorum]
                                                   [Penstemon laevigatus subsp. digitalis]
                                                   [Penstemon laevigatus var. angulatus]
                                                   [Penstemon laevigatus var. digitalis]
                                             Penstemon diphyllus
                                                   [Penstemon triphyllus subsp. diphyllus]
                                             Penstemon discolor
                                             Penstemon dissectus
                                             Penstemon distans
                                             Penstemon dolius
                                                   [Penstemon dolius var. dolius]
                                             Penstemon duchesnensis
                                                   [Penstemon dolius var. duchesnensis]
                                             Penstemon eatonii
                                                   [Penstemon eatoni]
                                               Penstemon eatonii var. eatonii
                                                     [Penstemon eatoni subsp. eatoni]
                                                     [Penstemon eatoni var. eatoni]
                                                     [Penstemon eatonii subsp. eatonii]
                                               Penstemon eatonii var. exsertus
                                                     [Penstemon eatonii subsp. exsertus]
                                               Penstemon eatonii var. undosus
                                                     [Penstemon eatoni subsp. undosus]
                                                     [Penstemon eatoni var. undosus]
                                                     [Penstemon eatonii subsp. undosus]
                                                     [Penstemon munzii]
                                             Penstemon elegantulus
                                             Penstemon ellipticus
                                                   [Penstemon davidsonii var. ellipticus]
                                             Penstemon eriantherus
                                                   [Penstemon cristatus]
                                                   [Penstemon eriantherus var. grandis]
                                               Penstemon eriantherus var. argillosus
                                                     [Penstemon dayanus]
                                                     [Penstemon whitedii subsp. dayanus]
                                               Penstemon eriantherus var. cleburnei
                                                     [Penstemon cleburnei]
                                               Penstemon eriantherus var. eriantherus
                                               Penstemon eriantherus var. redactus
                                                     [Penstemon whitedii subsp. tristis]
                                               Penstemon eriantherus var. whitedii
                                                     [Penstemon whitedii subsp. whitedii]
                                                     [Penstemon whitedii]
                                             Penstemon euglaucus
                                             Penstemon eximius
                                             Penstemon fasciculatus
                                             Penstemon fendleri
                                             Penstemon filiformis
                                                   [Penstemon laetus subsp. filiformis]
                                                   [Penstemon laetus var. filiformis]
                                             Penstemon flavescens
                                             Penstemon floribundus
                                             Penstemon floridus
                                               Penstemon floridus subsp. floridus
                                               Penstemon floridus var. austinii
                                                     [Penstemon austinii]
                                                     [Penstemon floridus subsp. austinii]
                                               Penstemon floridus var. floridus
                                                     [Penstemon floridus subsp. floridus]
                                             Penstemon flowersii
                                             Penstemon franklinii
                                             Penstemon fremontii
                                               Penstemon fremontii var. fremontii
                                               Penstemon fremontii var. glabrescens
                                             Penstemon fruticiformis
                                                   [Penstemon fruticiformis var. spiciformis]
                                               Penstemon fruticiformis var. amargosae
                                                     [Penstemon fruticiformis subsp. amargosae]
                                               Penstemon fruticiformis var. fruticiformis
                                                     [Penstemon fruticiformis subsp. fruticiformis]
                                             Penstemon fruticosus
                                               Penstemon fruticosus subsp. fruticosus
                                               Penstemon fruticosus var. fruticosus
                                               Penstemon fruticosus var. scouleri
                                                     [Penstemon fruticosus subsp. scouleri]
                                                     [Penstemon scouleri]
                                               Penstemon fruticosus var. serratus
                                                     [Penstemon fruticosus subsp. serratus]
                                             Penstemon gairdneri
                                               Penstemon gairdneri subsp. gairdneri
                                               Penstemon gairdneri var. gairdneri
                                                     [Penstemon gairdneri subsp. hians]
                                                     [Penstemon gairdneri var. hians]
                                               Penstemon gairdneri var. oreganus
                                                     [Penstemon gairdneri subsp. oreganus]
                                                     [Penstemon puberulentus]
                                             Penstemon gentianoides
                                                   [Penstemon skutchii]
                                             Penstemon gentryi
                                             Penstemon gibbensii
                                             Penstemon glaber
                                                   [Penstemon erianthera]
                                               Penstemon glaber var. alpinus
                                                     [Penstemon alpinus var. alpinus]
                                                     [Penstemon alpinus]
                                               Penstemon glaber var. brandegeei
                                                     [Penstemon alpinus subsp. brandegeei]
                                                     [Penstemon brandegeei]
                                               Penstemon glaber var. glaber
                                                     [Penstemon alpinus subsp. magnus]
                                                     [Penstemon alpinus var. nagnus]
                                             Penstemon glandulosus
                                               Penstemon glandulosus var. chelanensis
                                                     [Penstemon glandulosus subsp. chelanensis]
                                               Penstemon glandulosus var. glandulosus
                                             Penstemon glaucinus
                                             Penstemon globosus
                                                   [Penstemon confertus var. globosus]
                                             Penstemon goodrichii
                                             Penstemon gormanii
                                             Penstemon gracilentus
                                                   [Penstemon gracilentus var. ursorum]
                                             Penstemon gracilis
                                                   [Penstemon glaucus]
                                                   [Penstemon gracilis subsp. wisconsinensis]
                                                   [Penstemon gracilis var. gracilis]
                                                   [Penstemon gracilis var. wisconsinensis]
                                                   [Penstemon wisconsinensis]
                                               Penstemon gracilis subsp. gracilis
                                             Penstemon grahamii
                                             Penstemon grandiflorus
                                                   [Penstemon bradburii]
                                             Penstemon griffinii
                                             Penstemon grinnellii
                                               Penstemon grinnellii var. grinnellii
                                                     [Penstemon grinnellii subsp. grinnellii]
                                                     [Penstemon hians]
                                                     [Penstemon palmeri var. grinnellii]
                                               Penstemon grinnellii var. scrophularioides
                                                     [Penstemon X peirsonii]
                                                     [Penstemon grinnellii subsp. scrophularioides]
                                                     [Penstemon peirsonii]
                                                     [Penstemon scrophularioides]
                                                     [Penstemon × peirsonii]
                                                     [Penstemon]
                                             Penstemon guadalupensis
                                                   [Penstemon guadalupensis var. ernstii]
                                             Penstemon hallii
                                                   [Penstemon bakeri]
                                             Penstemon harbourii
                                             Penstemon harringtonii
                                                   [Penstemon harringtoni]
                                             Penstemon hartwegii
                                                   [Penstemon puniceus]
                                             Penstemon havardii
                                                   [Penstemon harvardii]
                                             Penstemon haydenii
                                             Penstemon henricksonii
                                             Penstemon heterodoxus
                                                   [Penstemon confertus var. geniculatus]
                                               Penstemon heterodoxus var. cephalophorus
                                                     [Penstemon cephalophorus]
                                                     [Penstemon heterodoxus subsp. cephalophorus]
                                               Penstemon heterodoxus var. heterodoxus
                                                     [Penstemon glastifolius]
                                                     [Penstemon heterodoxus subsp. heterodoxus]
                                               Penstemon heterodoxus var. shastensis
                                                     [Penstemon shastensis]
                                             Penstemon heterophyllus
                                                   [Penstemon heterophyllus subsp. australis]
                                               Penstemon heterophyllus var. australis
                                                     [Penstemon heterophyllus subsp. australis]
                                               Penstemon heterophyllus var. heterophyllus
                                                     [Penstemon heterophyllus subsp. heterophyllus]
                                               Penstemon heterophyllus var. purdyi
                                                     [Penstemon heterophyllus subsp. purdyi]
                                                     [Penstemon spinulosus]
                                             Penstemon hidalgensis
                                             Penstemon higginsii
                                             Penstemon hintonii
                                             Penstemon hirsutus
                                                   [Penstemon hirsutus var. hirsutus]
                                                   [Penstemon hirsutus var. minimus]
                                                   [Penstemon hirsutus var. pygmaeus]
                                                   [Penstemon pubescens]
                                             Penstemon humilis
                                                   [Penstemon collinus]
                                               Penstemon humilis var. brevifolius
                                                     [Penstemon humilis subsp. brevifolius]
                                               Penstemon humilis var. humilis
                                                     [Penstemon cinereus subsp. foliatus]
                                                     [Penstemon cinereus var. foliatus]
                                                     [Penstemon cinereus]
                                                     [Penstemon decurvus]
                                                     [Penstemon humilis subsp. humilis]
                                                     [Penstemon humilis var. deserticus]
                                                     [Penstemon puberulus]
                                               Penstemon humilis var. obtusifolius
                                                     [Penstemon humilis subsp. obtusifolius]
                                             Penstemon idahoensis
                                             Penstemon imberbis
                                             Penstemon immanifestus
                                             Penstemon incertus
                                                   [Penstemon fruticiformis var. incertus]
                                             Penstemon inflatus
                                             Penstemon isophyllus
                                             Penstemon jamesii
                                                   [Penstemon brevibarbatus]
                                                   [Penstemon jamesii var. jamesii]
                                                   [Penstemon similis]
                                               Penstemon jamesii subsp. jamesii
                                             Penstemon janishiae
                                                   [Penstemon miser]
                                             Penstemon kingii
                                                   [Penstemon nyeensis]
                                             Penstemon labrosus
                                                   [Penstemon barbatus var. labrosus]
                                             Penstemon laetus
                                               Penstemon laetus var. laetus
                                                     [Penstemon laetus subsp. laetus]
                                                     [Penstemon laetus var. typicus]
                                               Penstemon laetus var. leptosepalus
                                                     [Penstemon laetus subsp. leptosepalus]
                                               Penstemon laetus var. sagittatus
                                                     [Penstemon laetus subsp. sagittatus]
                                                     [Penstemon sagittatus]
                                             Penstemon laevigatus
                                                   [Penstemon penstemon]
                                             Penstemon laevis
                                             Penstemon lanceolatus
                                                   [Penstemon pauciflorus]
                                                   [Penstemon ramosus]
                                             Penstemon laricifolius
                                               Penstemon laricifolius var. exilifolius
                                                     [Penstemon exilifolius var. desertus]
                                                     [Penstemon laricifolius subsp. exilifolius]
                                               Penstemon laricifolius var. laricifolius
                                                     [Penstemon laricifolius subsp. laricifolius]
                                             Penstemon laxiflorus
                                                   [Penstemon australis subsp. laxiflorus]
                                                   [Penstemon australis var. ameles]
                                             Penstemon laxus
                                                   [Penstemon watsonii subsp. laxus]
                                             Penstemon leiophyllus
                                               Penstemon leiophyllus var. francisci-pennellii
                                                     [Penstemon francisci-pennellii]
                                               Penstemon leiophyllus var. keckii
                                                     [Penstemon keckii]
                                               Penstemon leiophyllus var. leiophyllus
                                             Penstemon lemhiensis
                                                   [Penstemon speciosus subsp. lemhiensis]
                                             Penstemon lentus
                                               Penstemon lentus subsp. lentus
                                               Penstemon lentus var. albiflorus
                                                     [Penstemon lentus subsp. albiflorus]
                                               Penstemon lentus var. lentus
                                             Penstemon leonardii
                                               Penstemon leonardii var. higginsii
                                               Penstemon leonardii var. leonardii
                                               Penstemon leonardii var. patricus
                                                     [Penstemon patricus]
                                             Penstemon linarioides
                                               Penstemon linarioides subsp. coloradoensis
                                                     [Penstemon coloradoensis]
                                               Penstemon linarioides subsp. linarioides
                                                     [Penstemon linarioides subsp. compactifolius]
                                                     [Penstemon linarioides subsp. typicus]
                                               Penstemon linarioides subsp. maguirei
                                               Penstemon linarioides subsp. sileri
                                                     [Penstemon linarioides var. sileri]
                                                     [Penstemon linarioides var. viridis]
                                               Penstemon linarioides var. coloradoensis
                                               Penstemon linarioides var. linarioides
                                               Penstemon linarioides var. maguirei
                                             Penstemon longiflorus
                                                   [Penstemon cyananthus subsp. longiflorus]
                                                   [Penstemon cyananthus var. longiflorus]
                                             Penstemon luculentus
                                             Penstemon lyalli
                                                   [Penstemon linearifolius]
                                             Penstemon lyallii
                                             Penstemon marcusii
                                                   [Penstemon moffatii subsp. marcusii]
                                                   [Penstemon pseudohumilis]
                                             Penstemon mensarum
                                             Penstemon metcalfei
                                             Penstemon miniatus
                                                   [Penstemon miniatus subsp. townsendianus]
                                                   [Penstemon miniatus var. townsendianus]
                                               Penstemon miniatus var. apateticus
                                                     [Penstemon miniatus subsp. apateticus]
                                             Penstemon minutifolius
                                             Penstemon moffatii
                                                   [Penstemon moffatii subsp. moffatii]
                                                   [Penstemon moffatii subsp. paysonii]
                                             Penstemon moffattii
                                             Penstemon mohinoranus
                                             Penstemon monoensis
                                                   [Penstemon divergens]
                                             Penstemon montanus
                                               Penstemon montanus subsp. montanus
                                               Penstemon montanus var. idahoensis
                                                     [Penstemon montanus subsp. idahoensis]
                                               Penstemon montanus var. montanus
                                             Penstemon moriahensis
                                             Penstemon mucronatus
                                                   [Penstemon murcronatus]
                                                   [Penstemon pachyphyllus var. mucronatus]
                                             Penstemon multiflorus
                                             Penstemon murrayanus
                                             Penstemon nanus
                                             Penstemon navajoa
                                             Penstemon neomexicanus
                                             Penstemon neotericus
                                             Penstemon newberryi
                                                   [Penstemon menziesii var. newberryi]
                                               Penstemon newberryi sonomensis
                                               Penstemon newberryi var. berryi
                                                     [Penstemon berryi]
                                                     [Penstemon newberryi subsp. berryi]
                                               Penstemon newberryi var. newberryi
                                                     [Penstemon newberryi subsp. newberryi]
                                               Penstemon newberryi var. sonomensis
                                                     [Penstemon newberryi subsp. sonomensis]
                                             Penstemon nitidus
                                               Penstemon nitidus var. nitidus
                                               Penstemon nitidus var. polyphyllus
                                                     [Penstemon nitidus subsp. polyphyllus]
                                             Penstemon nudiflorus
                                             Penstemon oklahomensis
                                             Penstemon oliganthus
                                                   [Penstemon pseudoparvus]
                                             Penstemon ophianthus
                                                   [Penstemon jamesii subsp. ophianthus]
                                             Penstemon osterhoutii
                                             Penstemon ovatus
                                                   [Penstemon leptophyllus]
                                             Penstemon pachyphyllus
                                               Penstemon pachyphyllus var. congestus
                                                     [Penstemon acuminatus var. congestus]
                                                     [Penstemon congestus]
                                                     [Penstemon pachyphyllus subsp. congestus]
                                               Penstemon pachyphyllus var. pachyphyllus
                                             Penstemon pahutensis
                                             Penstemon pallidus
                                                   [Penstemon arkansanus var. pubescens]
                                             Penstemon palmeri
                                               Penstemon palmeri subsp. palmeri
                                               Penstemon palmeri var. eglandulosus
                                                     [Penstemon palmeri subsp. eglandulosus]
                                               Penstemon palmeri var. macranthus
                                                     [Penstemon macranthus]
                                               Penstemon palmeri var. palmeri
                                                     [Penstemon X bryantiae]
                                                     [Penstemon bryantae]
                                                     [Penstemon bryantiae]
                                                     [Penstemon palmeri subsp. palmeri]
                                                     [Penstemon × bryantiae]
                                                     [Penstemon]
                                             Penstemon papillatus
                                             Penstemon parishii
                                             Penstemon parryi
                                             Penstemon parvulus
                                                   [Penstemon azureus subsp. parvulus]
                                                   [Penstemon azureus var. parvulus]
                                                   [Penstemon jaffrayanus var. parvulus]
                                             Penstemon parvus
                                             Penstemon patens
                                                   [Penstemon confusus subsp. patens]
                                                   [Penstemon confusus var. patens]
                                             Penstemon payettensis
                                             Penstemon paysoniorum
                                             Penstemon peckii
                                             Penstemon penlandii
                                             Penstemon pennellianus
                                             Penstemon perpulcher
                                                   [Penstemon minidokanus]
                                             Penstemon personatus
                                             Penstemon petiolatus
                                             Penstemon pinifolius
                                             Penstemon pinorum
                                             Penstemon plagapineus
                                             Penstemon platyphyllus
                                             Penstemon potosinus
                                             Penstemon pratensis
                                             Penstemon procerus
                                                   [Penstemon confertus var. procerus]
                                               Penstemon procerus brachyanthus
                                               Penstemon procerus modestus
                                               Penstemon procerus subsp. procerus
                                               Penstemon procerus var. aberrans
                                                     [Penstemon confertus var. aberrans]
                                                     [Penstemon procerus subsp. aberrans]
                                               Penstemon procerus var. brachyanthus
                                                     [Penstemon brachyanthus]
                                                     [Penstemon procerus subsp. brachyanthus]
                                                     [Penstemon tolmiei subsp. brachyanthus]
                                               Penstemon procerus var. formosus
                                                     [Penstemon formosus]
                                                     [Penstemon procerus subsp. formosus]
                                                     [Penstemon tolmiei subsp. formosus]
                                               Penstemon procerus var. modestus
                                                     [Penstemon modestus]
                                                     [Penstemon procerus subsp. modestus]
                                                     [Penstemon tolmiei subsp. modestus]
                                               Penstemon procerus var. procerus
                                                     [Penstemon confertus subsp. procerus]
                                                     [Penstemon confertus var. procerus]
                                                     [Penstemon procerus subsp. procerus]
                                               Penstemon procerus var. tolmiei
                                                     [Penstemon procerus subsp. tolmiei]
                                                     [Penstemon tolmiei subsp. tolmiei]
                                                     [Penstemon tolmiei]
                                             Penstemon pruinosus
                                             Penstemon pseudoputus
                                                   [Penstemon virgatus subsp. pseudoputus]
                                             Penstemon pseudospectabilis
                                                   [Penstemon pseudospectabilis subsp. pseudospectabilis]
                                               Penstemon pseudospectabilis subsp. connatifolius
                                               Penstemon pseudospectabilis subsp. pseudospectabilis
                                               Penstemon pseudospectabilis var. connatifolius
                                             Penstemon pudicus
                                             Penstemon pumilus
                                             Penstemon punctatus
                                             Penstemon purpusii
                                             Penstemon putus
                                                   [Penstemon virgatus subsp. putus]
                                             Penstemon radicosus
                                             Penstemon rattanii
                                               Penstemon rattanii var. kleei
                                                     [Penstemon rattanii subsp. kleei]
                                               Penstemon rattanii var. rattanii
                                                     [Penstemon rattanii subsp. rattanii]
                                             Penstemon reidmoranii
                                             Penstemon retrorsus
                                                   [Penstemon retrosus]
                                             Penstemon rhizomatosus
                                             Penstemon richardsonii
                                               Penstemon richardsonii subsp. richardsonii
                                               Penstemon richardsonii var. curtiflorus
                                                     [Penstemon richardsonii subsp. curtiflorus]
                                               Penstemon richardsonii var. dentatus
                                                     [Penstemon richardsonii subsp. dentatus]
                                               Penstemon richardsonii var. richardsonii
                                             Penstemon roezlii
                                                   [Penstemon cinerascens]
                                                   [Penstemon laetus subsp. roezlii]
                                                   [Penstemon laetus var. roezlii]
                                                   [Penstemon roezlii var. violaceus]
                                             Penstemon roseus
                                                   [Penstemon kunthii]
                                             Penstemon rostriflorus
                                                   [Penstemon bridgesii var. amplexicaulis]
                                                   [Penstemon bridgesii var. rostriflorus]
                                                   [Penstemon bridgesii]
                                             Penstemon rotundifolius
                                             Penstemon rubicundus
                                             Penstemon rupicola
                                                   [Penstemon newberryi var. rupicola]
                                             Penstemon rydbergii
                                                   [Penstemon attenuatus var. varians]
                                                   [Penstemon lacerellus]
                                                   [Penstemon latiusculus]
                                               Penstemon rydbergii var. aggregatus
                                                     [Penstemon aggregatus]
                                                     [Penstemon rydbergii subsp. aggregatus]
                                               Penstemon rydbergii var. oreocharis
                                                     [Penstemon hesperius]
                                                     [Penstemon oreocharis]
                                                     [Penstemon recurvatus]
                                                     [Penstemon tinctus]
                                                     [Penstemon vaseyanus]
                                               Penstemon rydbergii var. rydbergii
                                                     [Penstemon productus]
                                                     [Penstemon rydbergii var. varians]
                                             Penstemon saxosorum
                                             Penstemon scapoides
                                             Penstemon scariosus
                                               Penstemon scariosus var. albifluvis
                                                     [Penstemon albifluvis]
                                               Penstemon scariosus var. cyanomontanus
                                               Penstemon scariosus var. garrettii
                                                     [Penstemon garrettii]
                                               Penstemon scariosus var. scariosus
                                             Penstemon schaffneri
                                             Penstemon secundiflorus
                                                   [Penstemon unilateralis]
                                             Penstemon seorsus
                                                   [Penstemon linarioides var. seorsus]
                                             Penstemon sepalulus
                                             Penstemon serrulatus
                                                   [Penstemon diffusus]
                                             Penstemon smallii
                                             Penstemon spatulatus
                                             Penstemon speciosus
                                                   [Penstemon deserticola]
                                                   [Penstemon kennedyi]
                                                   [Penstemon piliferus]
                                                   [Penstemon speciosus subsp. kennedyi]
                                                   [Penstemon speciosus subsp. speciosus]
                                                   [Penstemon speciosus var. speciosus]
                                             Penstemon spectabilis
                                                   [Penstemon spectabilis var. gilmanii]
                                               Penstemon spectabilis var. spectabilis
                                                     [Penstemon spectabilis subsp. spectabilis]
                                               Penstemon spectabilis var. subinteger
                                                     [Penstemon spectabilis subsp. subinteger]
                                               Penstemon spectabilis var. subviscosus
                                                     [Penstemon spectabilis subsp. subviscosus]
                                             Penstemon stenophyllus
                                             Penstemon stephensii
                                                   [Penstemon clevelandii var. stephensii]
                                             Penstemon strictiformis
                                                   [Penstemon strictus subsp. strictiformis]
                                             Penstemon strictus
                                                   [Penstemon strictus subsp. angustus]
                                                   [Penstemon strictus var. strictus]
                                               Penstemon strictus subsp. strictus
                                             Penstemon subglaber
                                                   [Penstemon glaber var. utahensis]
                                             Penstemon subserratus
                                             Penstemon subulatus
                                             Penstemon sudans
                                                   [Penstemon deustus subsp. sudans]
                                             Penstemon superbus
                                             Penstemon tenuiflorus
                                             Penstemon tenuifolius
                                             Penstemon tenuis
                                             Penstemon tepicensis
                                             Penstemon teucrioides
                                             Penstemon thompsoniae
                                                   [Penstemon pumilus var. thompsoniae]
                                                   [Penstemon thompsoniae subsp. jaegeri]
                                                   [Penstemon thompsoniae subsp. thompsoniae]
                                                   [Penstemon thompsoniae var. desperatus]
                                               Penstemon thompsoniae var. thompsoniae
                                             Penstemon thurberi
                                                   [Leiostemon thurberi]
                                                   [Penstemon ambiguus var. thurberi]
                                                   [Penstemon thurberi var. anestius]
                                               Penstemon thurberi var. thurberi
                                             Penstemon tidestromii
                                                   [Penstemon leptanthus]
                                             Penstemon tiehmii
                                             Penstemon tracyi
                                             Penstemon triflorus
                                               Penstemon triflorus var. integrifolius
                                                     [Penstemon triflorus subsp. integrifolius]
                                               Penstemon triflorus var. triflorus
                                                     [Penstemon helleri]
                                                     [Penstemon triflorus subsp. triflorus]
                                             Penstemon triphyllus
                                               Penstemon triphyllus subsp. triphyllus
                                             Penstemon tubaeflorus
                                             Penstemon tubiflorus
                                                   [Penstemon tubiflorus var. achoreus]
                                                   [Penstemon tubiflorus var. tubiflorus]
                                             Penstemon tusharensis
                                                   [Penstemon caespitosus var. suffruticosus]
                                             Penstemon uintahensis
                                             Penstemon utahensis
                                             Penstemon venustus
                                             Penstemon versicolor
                                             Penstemon virens
                                             Penstemon virgatus
                                               Penstemon virgatus subsp. virgatus
                                               Penstemon virgatus var. asa-grayi
                                                     [Penstemon virgatus subsp. asa-grayi]
                                               Penstemon virgatus var. virgatus
                                             Penstemon vizcainensis
                                             Penstemon vulcanellus
                                             Penstemon wardii
                                             Penstemon washingtonensis
                                             Penstemon watsonii
                                                   [Penstemon phlogifolius]
                                               Penstemon watsonii subsp. watsonii
                                             Penstemon whippleanus
                                                   [Penstemon glaucus var. stenosepalus]
                                             Penstemon wilcoxii
                                                   [Penstemon ovatus var. pinetorum]
                                                   [Penstemon pinetorum]
                                             Penstemon wislizeni
                                             Penstemon wislizenii
                                             Penstemon wrightii
                                             Penstemon xylus
                                                   [Penstemon caespitosus subsp. suffruticosus]
                                             Penstemon yampaensis
                                                   [Penstemon acaulis var. yampaensis]
                                             Penstemon × crideri
                                             Penstemon × dubius
                                             Penstemon × jonesii
                                                   [Penstemon jonesi]
                                             Penstemon × mirus
                                             Penstemon × parishii
                                             Penstemon ×dubius
                                     Philcoxia
                                             Philcoxia minensis
                                     Picrorhiza
                                             Picrorhiza kurrooa
                                     Plantago
                                             Plantago afra
                                             Plantago albicans
                                                   [Plantago pallida]
                                             Plantago alismatifolia
                                             Plantago alpina
                                             Plantago arachnoidea
                                             Plantago arborescens
                                               Plantago arborescens subsp. maderensis
                                                     [Plantago maderensis]
                                             Plantago arenaria
                                                   [Plantago indica]
                                                   [Plantago psyllium]
                                                   [Plantago scabra]
                                                   [Psyllium arenarium]
                                             Plantago argyrea
                                                   [Plantago argyraea]
                                                   [Plantago purshii var. argyraea]
                                                   [Plantago purshii var. argyrea]
                                             Plantago aristata
                                                   [Plantago aristata var. nuttallii]
                                                   [Plantago gnaphalioides var. aristata]
                                                   [Plantago patagonica var. aristata]
                                             Plantago atrata
                                               Plantago atrata subsp. spadicea
                                                     [Plantago montana]
                                             Plantago australis
                                               Plantago australis subsp. australis
                                                     [Plantago durvillei]
                                               Plantago australis subsp. hirtella
                                                     [Plantago hirtella subsp. galeottiana]
                                                     [Plantago hirtella var. galeottiana]
                                                     [Plantago hirtella var. mollior]
                                                     [Plantago hirtella]
                                             Plantago barbata
                                             Plantago boissieri
                                             Plantago brasiliensis
                                             Plantago californica
                                             Plantago canescens
                                                   [Plantago canescens var. cylindrica]
                                                   [Plantago septata]
                                             Plantago ciliata
                                             Plantago cordata
                                             Plantago coronopus
                                                   [Plantago coronopus subsp. commutata]
                                                   [Plantago parishii]
                                             Plantago cynops
                                             Plantago debilis
                                             Plantago depressa
                                             Plantago drummondii
                                             Plantago elongata
                                                   [Plantago bigelovii subsp. bigelovii]
                                                   [Plantago bigelovii subsp. californica]
                                                   [Plantago bigelovii]
                                                   [Plantago californica]
                                                   [Plantago elongata subsp. elongata]
                                                   [Plantago elongata subsp. pentasperma]
                                                   [Plantago elongata var. elongata]
                                             Plantago erecta
                                                   [Plantago dura]
                                                   [Plantago erecta subsp. erecta]
                                                   [Plantago erecta subsp. rigidior]
                                                   [Plantago erecta var. erecta]
                                                   [Plantago hookeriana var. californica]
                                                   [Plantago patagonica var. californica]
                                                   [Plantago speciosa]
                                                   [Plantago tetrantha]
                                             Plantago eriopoda
                                                   [Plantago retrorsa]
                                                   [Plantago shastensis]
                                             Plantago floccosa
                                             Plantago gnaphalioides
                                             Plantago hawaiensis
                                                   [Plantago hawaiensis var. laxa]
                                             Plantago hedleyi
                                             Plantago helleri
                                             Plantago heterophylla
                                             Plantago hispidula
                                                   [Plantago tumida]
                                             Plantago hookeriana
                                                   [Plantago hookerana]
                                             Plantago lagopus
                                             Plantago lanceolata
                                                   [Plantago altissima]
                                                   [Plantago lanceolata var. sphaerostachya]
                                             Plantago linearis
                                             Plantago macrocarpa
                                                   [Plantago macrocarpum]
                                             Plantago major
                                                   [Plantago asiatica]
                                                   [Plantago halophila]
                                                   [Plantago major subsp. intermedia]
                                                   [Plantago major subsp. major]
                                                   [Plantago major var. asiatica]
                                                   [Plantago major var. flavovirens]
                                                   [Plantago major var. intermedia]
                                                   [Plantago major var. major]
                                                   [Plantago major var. pachyphylla]
                                                   [Plantago major var. pilgeri]
                                                   [Plantago major var. scopulorum]
                                             Plantago maritima
                                                   [Plantago juncoides var. californica]
                                                   [Plantago juncoides var. decipiens]
                                                   [Plantago juncoides var. glauca]
                                                   [Plantago juncoides var. laurentiana]
                                                   [Plantago juncoides]
                                                   [Plantago maritima subsp. borealis]
                                                   [Plantago maritima subsp. juncoides]
                                                   [Plantago maritima subsp. serpentina]
                                                   [Plantago maritima var. californica]
                                                   [Plantago maritima var. juncoides]
                                                   [Plantago maritima var. maritima]
                                                   [Plantago oliganthos var. fallax]
                                                   [Plantago oliganthos]
                                             Plantago media
                                                   [Plantago media var. monnieri]
                                             Plantago minuta
                                             Plantago nivea
                                                   [Plantago linearis var. mexicana]
                                                   [Plantago mexicana]
                                             Plantago notata
                                             Plantago ovata
                                                   [Plantago brunnea]
                                                   [Plantago gooddingii]
                                                   [Plantago minima]
                                               Plantago ovata var. fastigiata
                                                     [Plantago fastigiata]
                                                     [Plantago insularis var. fastigiata]
                                               Plantago ovata var. insularis
                                                     [Plantago insularis var. insularis]
                                                     [Plantago insularis var. scariosa]
                                                     [Plantago insularis]
                                             Plantago pachyphylla
                                                   [Plantago glabrifolia]
                                                   [Plantago grayana var. abrotanelloides]
                                                   [Plantago grayana]
                                                   [Plantago hillebrandii]
                                                   [Plantago krajinae]
                                                   [Plantago krajinai]
                                                   [Plantago melanochorous]
                                                   [Plantago melanochrous]
                                                   [Plantago muscicola]
                                                   [Plantago pachyphylla var. maviensis]
                                                   [Plantago pachyphylla var. rotundifolia]
                                             Plantago palustris
                                             Plantago patagonica
                                                   [Plantago oblonga]
                                                   [Plantago patagonica var. breviscapa]
                                                   [Plantago patagonica var. gnaphalioides]
                                                   [Plantago patagonica var. oblonga]
                                                   [Plantago patagonica var. patagonica]
                                                   [Plantago patagonica var. spinulosa]
                                                   [Plantago picta]
                                                   [Plantago purshii var. breviscapa]
                                                   [Plantago purshii var. oblonga]
                                                   [Plantago purshii var. picta]
                                                   [Plantago purshii var. spinulosa]
                                                   [Plantago purshii]
                                                   [Plantago spinulosa var. oblonga]
                                                   [Plantago spinulosa]
                                                   [Plantago wyomingensis]
                                             Plantago perssonii
                                             Plantago princeps
                                               Plantago princeps var. anomala
                                                     [Plantago princeps var. hirtella]
                                               Plantago princeps var. laxifolia
                                                     [Plantago princeps var. denticulata]
                                                     [Plantago princeps var. laxiflora]
                                               Plantago princeps var. longibracteata
                                                     [Plantago princeps var. acaulis]
                                                     [Plantago princeps var. elata]
                                               Plantago princeps var. princeps
                                                     [Plantago princeps var. queleniana]
                                             Plantago pusilla
                                                   [Plantago hybrida]
                                                   [Plantago pusilla var. major]
                                             Plantago rhodosperma
                                             Plantago rugelii
                                               Plantago rugelii var. asperula
                                               Plantago rugelii var. rugelii
                                             Plantago sempervirens
                                             Plantago sparsiflora
                                             Plantago subnuda
                                                   [Plantago hirtella var. galeottiana]
                                             Plantago tolucensis
                                             Plantago truncata
                                               Plantago truncata subsp. firma
                                                     [Plantago firma]
                                               Plantago truncata subsp. truncata
                                                     [Plantago truncata var. truncata]
                                             Plantago tubulosa
                                                   [Plantago purpusii]
                                             Plantago tweedyi
                                                   [Plantago eriopoda var. tweedyi]
                                             Plantago uniflora
                                                   [Littorella lacustris]
                                             Plantago uniglumis
                                             Plantago virginica
                                                   [Plantago virginica var. viridescens]
                                             Plantago webbii
                                             Plantago wrightiana
                                                   [Plantago hookeriana var. nuda]
                                     Pocilla
                                     Pseudolysimachion
                                             Pseudolysimachion spurium
                                                   [Veronica spuria]
                                     Pseudorontium
                                             Pseudorontium cyathiferum
                                                   [Antirrhinum cyathiferum]
                                     Psyllium
                                     Ranapalus
                                     Rhodochiton
                                             Rhodochiton atrosanguineum
                                                   [Lophospermum atrosanguineum]
                                             Rhodochiton hintonii
                                                   [Lophospermum hintonii]
                                     Russelia
                                             Russelia campechiana
                                             Russelia coccinea
                                                   [Russelia acuminata]
                                                   [Russelia longifolia]
                                             Russelia contrerasii
                                             Russelia equisetiformis
                                                   [Russelia juncea]
                                             Russelia floribunda
                                                   [Russelia floribunda var. pubescens]
                                             Russelia furfuracea
                                             Russelia grandidentata
                                             Russelia hintonii
                                             Russelia lanceifolia
                                             Russelia multiflora
                                             Russelia obtusata
                                             Russelia parvifolia
                                             Russelia polyedra
                                             Russelia pringlei
                                             Russelia pubescens
                                             Russelia purpusii
                                             Russelia retrorsa
                                                   [Russelia retrorsa f. nudicostata]
                                                   [Russelia trachypleura]
                                                   Russelia retrorsa f. retrorsa
                                             Russelia rotundifolia
                                             Russelia rugosa
                                             Russelia sarmentosa
                                                   [Russelia chiapensis]
                                                   [Russelia sarmentosa var. oaxacensis]
                                             Russelia sonorensis
                                             Russelia tenuis
                                             Russelia tepicensis
                                             Russelia tetraptera
                                             Russelia verticillata
                                             Russelia villosa
                                             Russelia worthingtonii
                                     Sairocarpus
                                             Sairocarpus cornutus
                                                   [Antirrhinum cornutum var. cornutum]
                                                   [Antirrhinum cornutum var. leptaleum]
                                                   [Antirrhinum cornutum]
                                                   [Antirrhinum leptaleum]
                                             Sairocarpus coulterianus
                                                   [Antirrhinum coulterianum subsp. orcuttianum]
                                                   [Antirrhinum coulterianum]
                                                   [Antirrhinum nevinianum]
                                                   [Antirrhinum orcuttianum]
                                             Sairocarpus elmeri
                                                   [Antirrhinum elmeri]
                                             Sairocarpus nuttallianus
                                                   [Antirrhinum nuttallianum subsp. nuttallianum]
                                                   [Antirrhinum nuttallianum var. effusum]
                                                   [Antirrhinum nuttallianum var. nuttallianum]
                                                   [Antirrhinum nuttallianum]
                                             Sairocarpus pusillus
                                                   [Antirrhinum nuttallianum subsp. subsessile]
                                                   [Antirrhinum subsessile]
                                             Sairocarpus watsonii
                                                   [Antirrhinum kingii var. watsonii]
                                                   [Antirrhinum watsonii]
                                     Schistophragma
                                             Schistophragma intermedium
                                                   [Conobea intermedia]
                                                   [Schistophragma intermedia]
                                             Schistophragma mexicanum
                                                   [Schistophragma pusilla]
                                                   [Schistophragma pusillum]
                                             Schistophragma polystachya
                                                   [Stemodia polystachya]
                                             Schistophragma polystachyum
                                     Scoparia
                                             Scoparia dulcis
                                                   [Scoparia grandiflora]
                                                   [Scoparia nudicaulis]
                                             Scoparia flava
                                             Scoparia hassleriana
                                             Scoparia mexicana
                                             Scoparia montevidensis
                                               Scoparia montevidensis var. glandulifera
                                     Sibthorpia
                                             Sibthorpia repens
                                                   [Sibthorpia pichinchensis]
                                     Sophronanthe
                                     Stemodia
                                           [Lendneria]
                                             Stemodia bartsioides
                                             Stemodia durantifolia
                                                   [Capraria durantifolia]
                                                   [Stemodia arizonica]
                                                   [Stemodiacra durantifolia]
                                             Stemodia ericifolia
                                             Stemodia florulenta
                                             Stemodia fruticosa
                                             Stemodia grossa
                                             Stemodia jorullensis
                                                   [Stemodia angulata]
                                             Stemodia lanata
                                                   [Stemodia tomentosa]
                                             Stemodia lanceolata
                                             Stemodia macrantha
                                             Stemodia maritima
                                             Stemodia palmeri
                                             Stemodia palustris
                                             Stemodia peduncularis
                                             Stemodia pusilla
                                             Stemodia schottii
                                             Stemodia stricta
                                             Stemodia suffruticosa
                                             Stemodia tenuifolia
                                             Stemodia verticillata
                                                   [Erinus verticillatus]
                                                   [Lendneria verticillata]
                                                   [Lindernia verticillata]
                                     Stemodiacra
                                     Synthyris
                                           [Besseya]
                                             Synthyris alpina
                                                   [Besseya alpina]
                                             Synthyris borealis
                                             Synthyris bullii
                                                   [Besseya bullii]
                                                   [Wulfenia bullii]
                                             Synthyris canbyi
                                             Synthyris cordata
                                                   [Synthyris reniformis var. cordata]
                                                   [Synthyris rotundifolia var. cordata]
                                                   [Wulfenia cordata]
                                             Synthyris dissecta
                                                   [Synthyris cymopteroides]
                                                   [Synthyris hendersonii]
                                                   [Synthyris pinnatifida var. canescens]
                                             Synthyris laciniata
                                                   [Synthyris laciniata subsp. ibapahensis]
                                                   [Synthyris laciniata subsp. laciniata]
                                                   [Synthyris pinnatifida var. laciniata]
                                             Synthyris lanuginosa
                                                   [Synthyris pinnatifida var. lanuginosa]
                                             Synthyris missurica
                                                   [Synthyris major]
                                                   [Synthyris missurica subsp. stellata]
                                                   [Synthyris stellata]
                                                   [Veronica missurica]
                                                   [Wulfenia major]
                                                   [Wulfenia reniformis var. major]
                                               Synthyris missurica subsp. major
                                                     [Synthyris missurica var. major]
                                                     [Synthyris reniformis var. major]
                                               Synthyris missurica subsp. missurica
                                                     [Synthyris major]
                                                     [Synthyris missurica subsp. hirsuta]
                                                     [Synthyris missurica var. missurica]
                                                     [Synthyris missurica]
                                                     [Synthyris stellata]
                                                     [Wulfenia major]
                                             Synthyris oblongifolia
                                                   [Besseya oblongifolia]
                                             Synthyris pinnatifida
                                                   [Synthyris paysonii]
                                                   [Synthyris pinnatifida var. pinnatifida]
                                             Synthyris plantaginea
                                                   [Besseya arizonica]
                                                   [Besseya plantaginea]
                                             Synthyris platycarpa
                                             Synthyris ranunculina
                                             Synthyris reniformis
                                                   [Synthyris reniformis var. reniformis]
                                                   [Wulfenia reniformis]
                                             Synthyris ritteriana
                                                   [Besseya ritteriana]
                                                   [Synthyris ritteriana var. obtusa]
                                             Synthyris rotundifolia
                                             Synthyris rubra
                                                   [Besseya rubra]
                                             Synthyris schizantha
                                             Synthyris wyomingensis
                                                   [Besseya cinerea]
                                                   [Besseya wyomingensis]
                                     Tonella
                                             Tonella floribunda
                                             Tonella tenella
                                                   [Collinsia tenella]
                                                   [Tonella collinsioides]
                                     Tragiola
                                     Tursitis
                                     Uroskinnera
                                             Uroskinnera almedae
                                             Uroskinnera flavida
                                             Uroskinnera hirtiflora
                                               Uroskinnera hirtiflora var. breviloba
                                               Uroskinnera hirtiflora var. hirtiflora
                                             Uroskinnera spectabilis
                                     Usteria
                                     Veronica
                                             Veronica agrestis
                                                   [Pocilla agrestis]
                                             Veronica albicans
                                             Veronica alpina
                                                   [Veronica alpina subsp. australis]
                                                   [Veronica alpina var. alpina]
                                                   [Veronica alpina var. australis]
                                             Veronica americana
                                                   [Veronica anagallis]
                                                   [Veronica beccabunga var. americana]
                                             Veronica anagallis-aquatica
                                                   [Veronica anagallisaquatica]
                                                   [Veronica comosa]
                                                   [Veronica glandifera]
                                                   [Veronica micromera]
                                                   [Veronica micromeria]
                                                   [Veronica salina]
                                               Veronica anagallis-aquatica subsp. anagallis-aquatica
                                                     [Veronica aquatica]
                                               Veronica anagallis-aquatica subsp. oxycarpa
                                                     [Veronica montioides]
                                             Veronica anagalloides
                                             Veronica aphylla
                                             Veronica archboldii
                                             Veronica argute-serrata
                                             Veronica arguteserrata
                                             Veronica arvensis
                                             Veronica austriaca
                                               Veronica austriaca subsp. vahlii
                                             Veronica barrelieri
                                             Veronica beccabunga
                                             Veronica bellidioides
                                             Veronica biloba
                                                   [Pocilla biloba]
                                                   [Veronica microtheca]
                                             Veronica bollonsii
                                                   [Hebe bollonsii]
                                             Veronica californica
                                             Veronica campylopoda
                                             Veronica cana
                                             Veronica catarractae
                                               Veronica catarractae subsp. catarractae
                                                     [Hebe catarractae]
                                             Veronica catenata
                                                   [Veronica catenata var. glandulosa]
                                                   [Veronica comosa var. glaberrima]
                                                   [Veronica comosa var. glandulosa]
                                                   [Veronica comosa]
                                                   [Veronica connata subsp. glaberrima]
                                                   [Veronica connata var. glaberrima]
                                                   [Veronica connata var. typica]
                                                   [Veronica connata]
                                             Veronica chamaedrys
                                               Veronica chamaedrys subsp. chamaedrys
                                             Veronica copelandii
                                                   [Veronica copelandi]
                                             Veronica cupressoides
                                                   [Hebe cupressoides]
                                             Veronica cusickii
                                             Veronica cymbalaria
                                                   [Veronica glandulifera]
                                             Veronica decumbens
                                                   [Hebe decumbens]
                                             Veronica derwentiana
                                               Veronica derwentiana subsp. derwentiana
                                                     [Derwentia derwentiana]
                                             Veronica dillenii
                                             Veronica diosmifolia
                                                   [Hebe diosmifolia]
                                                   [Hebe menziesii]
                                             Veronica elliptica
                                                   [Hebe elliptica]
                                             Veronica epacridea
                                                   [Hebe epacridea]
                                             Veronica filiformis
                                             Veronica formosa
                                                   [Hebe formosa]
                                             Veronica fruticans
                                             Veronica gentianoides
                                             Veronica grandiflora
                                             Veronica grandis
                                                   [Veronica bachofenii]
                                             Veronica hectorii
                                               Veronica hectorii subsp. hectorii
                                                     [Hebe hectorii]
                                               Veronica hectorii subsp. laingii
                                                     [Veronica laingii]
                                             Veronica hederifolia
                                                   [Veronica hederaefolia var. hederaefolia]
                                                   [Veronica hederaefolia var. triloba]
                                                   [Veronica hederaefolia]
                                                   [Veronica hederifolia var. hederifolia]
                                                   [Veronica hederifolia var. triloba]
                                             Veronica hulkeana
                                               Veronica hulkeana subsp. hulkeana
                                                     [Hebe hulkeana]
                                             Veronica incana
                                                   [Veronica spicata subsp. incana]
                                             Veronica intercedens
                                                   [Veronica elbursensis]
                                             Veronica javanica
                                             Veronica krylovii
                                             Veronica laxa
                                             Veronica lewisii
                                             Veronica longifolia
                                                   [Pseudolysimachion longifolium]
                                               Veronica longifolia subsp. longifolia
                                                     [Veronica maritima]
                                             Veronica lyallii
                                                   [Hebe lyallii]
                                             Veronica macrocarpa
                                                   [Hebe macrocarpa]
                                             Veronica mexicana
                                             Veronica montana
                                             Veronica odora
                                                   [Hebe buxifolia]
                                             Veronica officinalis
                                               Veronica officinalis var. officinalis
                                                     [Veronica officinalis var. tournefortii]
                                                     [Veronica tournefortii]
                                             Veronica opaca
                                             Veronica peregrina
                                                   [Veronica peregrina subsp. peregrina]
                                                   [Veronica peregrina var. typica]
                                                   [Veronica peregrina var. xalapensis]
                                                   [Veronica sherwoodii]
                                                   [Veronica xalapensis]
                                               Veronica peregrina subsp. xalapensis
                                                     [Veronica peregrina var. xalapensis]
                                               Veronica peregrina var. peregrina
                                             Veronica perfoliata
                                                   [Derwentia perfoliata]
                                                   [Parahebe perfoliata]
                                             Veronica persica
                                                   [Pocilla persica]
                                                   [Veronica buxbaumii]
                                                   [Veronica byzantina]
                                                   [Veronica persica var. aschersoniana]
                                                   [Veronica persica var. corrensiana]
                                                   [Veronica persica var. persica]
                                             Veronica pinnata
                                                   [Pseudolysimachion pinnatum]
                                             Veronica plebeia
                                                   [Veronica plebia]
                                             Veronica polita
                                                   [Pocilla polita]
                                                   [Veronica didyma]
                                             Veronica prostrata
                                                   [Veronica carnea]
                                             Veronica pulvinaris
                                                   [Chionohebe pulvinaris]
                                             Veronica punicea
                                                   [Hebe macrocarpa var. brevifolia]
                                             Veronica pusilla
                                                   [Veronica glaberrima]
                                             Veronica regina-nivalis
                                             Veronica repens
                                             Veronica ritteriana
                                                   [Synthyris reflexa]
                                             Veronica rubra
                                             Veronica salicifolia
                                                   [Hebe salicifolia]
                                             Veronica schizantha
                                             Veronica scutellata
                                                   [Veronica scutellata var. villosa]
                                             Veronica serpyllifolia
                                                   [Veronica humifusa]
                                                   [Veronica serpyllifolia subsp. serpyllifolia]
                                                   [Veronica serpyllifolia var. borealis]
                                                   [Veronica serpyllifolia var. humifusa]
                                                   [Veronica serpyllifolia var. nummularioides]
                                                   [Veronica tenella]
                                                   [Veronicastrum serpyllifolium subsp. humifusum]
                                                   [Veronicastrum serpyllifolium]
                                               Veronica serpyllifolia subsp. humifusa
                                                     [Veronica serpyllifolia var. humifusa]
                                               Veronica serpyllifolia subsp. serpyllifolia
                                               Veronica serpyllifolia var. serpyllifolia
                                             Veronica spicata
                                                   [Pseudolysimachion spicatum]
                                                   [Veronica spicata subsp. spicata]
                                             Veronica stelleri
                                                   [Veronica stelleri var. glabrescens]
                                                   [Veronica wormskjoldii var. stelleri]
                                             Veronica stricta
                                                   [Hebe stricta]
                                               Veronica stricta var. macroura
                                                     [Hebe macroura]
                                             Veronica stylophora
                                             Veronica sublobata
                                             Veronica subsessilis
                                                   [Veronica longifolia var. subsessilis]
                                             Veronica szechuanica
                                               Veronica szechuanica subsp. sikkimensis
                                             Veronica tetrasticha
                                                   [Hebe tetrasticha]
                                             Veronica teucrium
                                                   [Veronica austriaca subsp. teucrium]
                                                   [Veronica catalaunica]
                                                   [Veronica crinita]
                                                   [Veronica latifolia]
                                             Veronica traversii
                                                   [Hebe traversii]
                                             Veronica triloba
                                             Veronica triphyllos
                                             Veronica undulata
                                             Veronica urticifolia
                                             Veronica venustula
                                                   [Hebe laevis]
                                             Veronica verna
                                             Veronica wallii
                                                   [Hebe carnea]
                                             Veronica wormskjoldii
                                                   [Veronica alpina subsp. wormskjoldii]
                                                   [Veronica alpina var. alterniflora]
                                                   [Veronica alpina var. wormskjoldii]
                                                   [Veronica wormskjoldii var. wormskjoldii]
                                               Veronica wormskjoldii subsp. nutans
                                                     [Veronica alpina var. alterniflora]
                                                     [Veronica alpina var. cascadensis]
                                                     [Veronica alpina var. geminiflora]
                                                     [Veronica alpina var. nutans]
                                                     [Veronica alpina var. unalaschcensis]
                                                     [Veronica nutans]
                                                     [Veronica wormskjoldii subsp. alterniflora]
                                               Veronica wormskjoldii subsp. wormskjoldii
                                                     [Veronica alpina var. terrae-novae]
                                                     [Veronica wormskjoldii var. wormskjoldii]
                                             Veronica wyomingensis
                                                   [Besseya gymnocarpa]
                                             Veronica yunnanensis
                                             Veronica × andersonii
                                             Veronica × lackschewitzii
                                             Veronica ×andersonii
                                                   [Hebe ×andersonii]
                                     Veronicastrum
                                             Veronicastrum brunonianum
                                             Veronicastrum sibiricum
                                             Veronicastrum villosulum
                                                   [Botryopleuron macrophyllum]
                                             Veronicastrum virginicum
                                                   [Leptandra virginica]
                                                   [Veronica virginica]
                                             Veronicastrum yunnanense
                                     Wulfenia

Problematic Rooting (74511)
                                               Plantago bigelovii subsp. bigelovii
                                               Plantago bigelovii subsp. californica
                                                     [Plantago elongata var. californica]

Problematic Rooting (75586)
                                               Sairocarpus vexillocalyculatus subsp. breweri
                                                     [Antirrhinum breweri var. ovalifolium]
                                               Sairocarpus vexillocalyculatus subsp. intermedius
                                               Sairocarpus vexillocalyculatus subsp. vexillocalyculatus
                                                     [Antirrhinum coulterianum var. appendiculatum]