Whiting Ranch Wilderness Park Vascular Plant Checklist
Authors: Contributors: Robert Allen, James Bailey, Rebecca E. Crowe, Emile Fiesler, Kyle Gunther, Fred Roberts, Michael G. Simpson, Ron Vanderhoff

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Families: 82
Genera: 271
Species: 390
Total Taxa (details): 392

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NATIVE Note: Not determined to subtaxa, iNat Observations
NATURALIZED (native to southern Africa), CalFlora Observations
Amaranthus albus L. - White Tumbleweed
NATURALIZED (native to central North America), iNat Observations; CalFlora Observations; Ron Vanderhoff 1091 [IRVC]
Amaranthus retroflexus L. - Redroot Pigweed
NATURALIZED (native to central and eastern North America), iNat Observations
Atriplex sp. - saltbush
Note: Not determined to species, needs study, iNat Observations
Atriplex suberecta I. Verd. - Peregrine Saltbush
NATURALIZED (native to Australia), iNat Observations; CalFlora Observations
Blitum californicum S. Wats. - California Goosefoot
NATIVE, Note: See Fuentes-Bazan, et al. 2012. Willdenowia 42:5-24; a recent name change from Chenopodium californicum; iNat Observations; CalFlora Observations
NATURALIZED (native to Europe). Note: See Fuentes-Bazan, et al. 2012; a recent name change from Chenopodium murale, iNat Observations; CalFlora Observations
Chenopodium album L. - Lamb's Quarters
Salsola sp. - tumbleweed
NATURALIZED Note: Not determined to species, iNat Observations
Salsola australis R. Br. - Australian Tumbleweed
NATURALIZED (possibly native to Australia), iNat Observations; CalFlora Observations; Ron Vanderhoff 1132 [IRVC]
Amaryllis belladonna L. - Belladonna-Lily
NON-NATIVE; probable WAIF (native to South Africa), iNat Observations
WAIF (native to southern Africa), iNat Observations
Schinus molle L. - Peruvian Pepper Tree
Schinus terebinthifolius Raddi - Brazilian Pepper Tree
Apium graveolens L. - Common Celery
NATURALIZED (native to Eurasia); Ron Vanderhoff 1083 [IRVC]
Conium maculatum L. - Common Poison Hemlock
NATURALIZED (native to Europe), CalFlora Observations
NATURALIZED (native to South America), iNat Observations
NATURALIZED (native to southern Europe), iNat Observations; CalFlora Observations
NATIVE, Note: A recent name change from Funastrum cynanchoides var. hartwegii; see Fishbein and Gandhi. 2018. Novon 26:165-167; iNat Observations; CalFlora Observations; Ron Vanderhoff 1105 [IRVC]
NATURALIZED (native locality unclear, possibly southwest Asia), iNat Observations; CalFlora Observations; Ron Vanderhoff 1076 [IRVC]
Vinca major L. - Greater Periwinkle
Phoenix canariensis H.Wildpret - Canary Island Date Palm
NATURALIZED (native to Canary Islands), CalFlora Observations; Ron Vanderhoff 1072 [IRVC]
NATURALIZED (native to Baja California, Sonora, Mexico), iNat Observations; CalFlora Observations
Artemisia dracunculus L. - Tarragon, Dragon Sagewort
NATIVE Note: Not determined to subspecies, iNat Observations
NATURALIZED in the Park, likely from restoration plantings.; Ron Vanderhoff 1108 [IRVC]
NATURALIZED in the Park (native to S. San Diego Co., N Baja), ; CalFlora Observations
Bidens pilosa L. - Common Beggar’s Tick, Spanish Needles
NATURALIZED (native to South and Central America), iNat Observations; CalFlora Observations; Ron Vanderhoff 1135 [IRVC]
NATURALIZED (native to Mediterranean)
NATURALIZED (native to Mediterranean) Note: only Carduus pycnocephalus var. pycnocephalus treated as occurring in CA in the Jepson Manual and in FNA., iNat Observations; CalFlora Observations
NATURALIZED (native to southern Europe), iNat Observations; CalFlora Observations
NATIVE Note: Not determined to variety, iNat Observations
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
NATIVE, Note: Treated as a single polymorphic species in the Flora of North America and Jepson eFlora, that concept tentatively accepted here, pending further research. iNat Observations; CalFlora Observations; Ron Vanderhoff 1156 [IRVC]
NATURALIZED (native to Australia), iNat Observations
NATURALIZED (native to Southern Europe) Note: Not determined to variety, but likely var. flavescens, iNat Observations; CalFlora Observations
NATURALIZED (native to western Europe, Mediterranean, southwestern Asia), CalFlora Observations; Ron Vanderhoff 1097 [IRVC]
Native to California, but likely NATURALIZED in the Park, iNat Observations; CalFlora Observations; Ron Vanderhoff 1163 [IRVC]
NATIVE Note: Not determined to variety, iNat Observations
Erigeron bonariensis L. - Flax-Leaf Fleabane
NATURALIZED (native to South America), iNat Observations; CalFlora Observations
NATURALIZED (native to New Mexico, Wyoming), iNat Observations
NATIVE Note: Not determined to species.; Ron Vanderhoff 1104 [IRVC]
NATURALIZED (native to Mediterranean), iNat Observations
NATIVE Note: Not determined to subspecies, iNat Observations; CalFlora Observations
Hypochaeris glabra L. - Smooth Cat’s Ear
NATURALIZED (native to Europe), iNat Observations
NATIVE Note: Not determined to variety, iNat Observations
Lactuca serriola L. - Prickly Lettuce
NATURALIZED (native to Europe), iNat Observations
Logfia gallica (L.) Coss. & Germ. - Narrow-Leaf Cottonrose
NATURALIZED (native to Mediterranean), iNat Observations
Matricaria discoidea DC. - Common Pineapple-Weed
NATIVE (stated as native to northwestern North America, northeastern Asia in Jepson eFlora; considered NATURALIZED in some references), iNat Observations
NATURALIZED (native to Eurasia), iNat Observations
Senecio californicus DC. - California Butterweed
Senecio vulgaris - Common Groundsel
NATURALIZED (native to Eurasia, n. Africa), iNat Observations
NATIVE (native to Mediterranean), iNat Observations; CalFlora Observations
Solidago velutina DC. - Velvety Goldenrod
NATIVE Note: Not determined to subspecies, iNat Observations; CalFlora Observations
Sonchus asper (L.) Hill - Prickly Sow-Thistle
NATURALIZED (native to Europe), iNat Observations
Sonchus oleraceus L. - Common Sow-Thistle
NATURALIZED (native to Europe), iNat Observations
Stephanomeria exigua - Small Wreath-Plant
Stylocline gnaphaloides Nutt. - Everlasting Nest-Straw
Xanthium spinosum - Spiny Cocklebur
NATURALIZED (nativity confused, perhaps South America), iNat Observations
NATIVE Note: Not determined to variety, iNat Observations; CalFlora Observations
NATURALIZED (native to Europe), iNat Observations
NATURALIZED (native to Mediterranean, southwestern Asia), iNat Observations; CalFlora Observations
NATURALIZED (native to Eurasia), iNat Observations
Diplotaxis muralis (L.) DC. - annual wallrocket
NATURALIZED (native to Europe), iNat Observations
NATIVE (native to Mediterranean), iNat Observations; CalFlora Observations
Lepidium didymum L. - Lesser Wart-Cress
NATURALIZED (native to South America), iNat Observations
Lepidium nitidum Nutt. - Shining Peppergrass
Sisymbrium irio L. - London Rocket Mustard
NATURALIZED (native to Europe), iNat Observations
NATURALIZED (native to Eurasia), iNat Observations
Sisymbrium orientale L. - Oriental Hedge Mustard
NATURALIZED (native to Eurasia), iNat Observations
Native to the region but probably NATURALIZED here from a planting, Note: A recent name change from Cylindropuntia californica var. parkeri; see Baker, M. A. and D. J. Pinkava. 2018. Chromosome numbers in some cacti of western North America — IX. Haseltonia 2018:5-29. iNat Observations; CalFlora Observations
Opuntia sp. - Prickly-Pear
Note: Not determined to species. Hybrids possible, iNat Observations
NATURALIZED (native range unknown, possibly Mexico), iNat Observations; CalFlora Observations
NATIVE Note: Not determined to variety, iNat Observations
Silene gallica L. - Windmill Pink
NATURALIZED (native to Europe), iNat Observations
Stellaria media (L.) Vill. - Common Chickweed
NATURALIZED (native to southwestern Europe), iNat Observations; CalFlora Observations
PERSISTING FROM CULTIVATION (hybrid of C. creticus and C. ladanifer, both of European origin), iNat Observations
NATIVE, Note: The subspecies of Calystegia macrostegia are not recognized in a recent thesis, Namoff, S. M. 2017. Hybridization processes, biogeographic patterns and taxonomic rearrangements within Calystegia (Convolvulaceae). PhD. Claremont Graduate University, Claremont, California, USA, which we follow here. iNat Observations; CalFlora Observations
Cuscuta californica Hook. & Arn. - California/Chaparral Dodder
WAIF (probably native to Mexico, Texas); Ron Vanderhoff 1077 [IRVC]
NATURALIZED (native to eastern Africa, sometimes cultivated), CalFlora Observations; Ron Vanderhoff 1079 [IRVC]
Arctostaphylos glandulosa Eastw. - Eastwood's manzanita
Euphorbia lathyris L. - caper spurge
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
Euphorbia maculata L. - Spotted Spurge
NATURALIZED (native to Eastern North America), iNat Observations
Euphorbia peplus L. - Petty Spurge
NATURALIZED (native to Europe), iNat Observations
Euphorbia polycarpa Benth. - Small-Seed Sandmat
NATURALIZED (native to Nevada, Mexico), Note: Varieties of this species not accepted in the Jepson eFlora treatment. iNat Observations
Ricinus communis L. - Castor Bean
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
Acacia cyclops A. Cunn. ex G. Don - Western Coastal Wattle
NATURALIZED (native to southwestern Australia), iNat Observations; CalFlora Observations
Acacia redolens Maslin - Vanilla Scented Wattle
NATURALIZED (native to southwestern Australia), iNat Observations; CalFlora Observations
Acmispon strigosus (Nutt.) Brouillet - Bishop’s/Strigose Lotus
NATIVE, Note: Recently treated as Ottleya strigosa (Nutt.) D.D.Sokoloff in Plants of the World Online and iNaturalist. iNat Observations; CalFlora Observations
NATURALIZED (native to southeastern Asia, southwestern Australia), iNat Observations; CalFlora Observations
Native to CA, but PERSISTING FROM CULTIVATION at site, iNat Observations; CalFlora Observations
NATIVE Note: Not determined to subspecies, iNat Observations
Lotus corniculatus L. - Birdfoot Trefoil
NATURALIZED (native to Eurasia), iNat Observations
NATIVE Note: Not determined to subtaxa, iNat Observations; Kristin Steckley 9608 [LOB]
NATURALIZED (native to Mediterranean, Europe), iNat Observations
NATURALIZED (native to Mediterranean), iNat Observations
WAIF (native to Central and South America) Note: small patch at trailside.; Ron Vanderhoff 876 [IRVC]
Spartium junceum L. - Spanish Broom
NATURALIZED (native to Mediterranean), CalFlora Observations
NATURALIZED (native to Eurasia, Northern Africa), iNat Observations
Trifolium repens L. - White Clover
NATURALIZED (native to Eurasia), iNat Observations
Quercus agrifolia Née - Coast Live Oak
NATIVE Note: Not determined to variety, iNat Observations
Erodium botrys (Cav.) Bertol. - Long-Beak Filaree/Storksbill
NATURALIZED (native to Southern Europe), iNat Observations
Erodium cicutarium (L.) L'Hér. ex Aiton - Red-Stem Filaree/Storksbill
NATURALIZED (native to Eurasia), iNat Observations; CalFlora Observations
Erodium moschatum (L.) L'Hér. ex Aiton - White-Stem Filaree/Storksbill
NATURALIZED (native to Europe), iNat Observations
Geranium carolinianum L. - Carolina geranium
Geranium dissectum L. - Cut-Leaf Geranium
NATURALIZED (native to Europe, Northern Africa, Western Asia), iNat Observations
Ribes aureum Pursh - Golden Currant
Native to California, but likely NATURALIZED in the park. Appearing to establish from a planting adjacent to trails, iNat Observations; Ron Vanderhoff 929 [IRVC]
Ribes malvaceum Sm. - Chaparral Currant
NATIVE, Note: not identified to variety, two of which are in OC. iNat Observations
Juglans californica S. Watson - California black walnut
Native to California and part of Orange County, but likely NATURALIZED from plantings in the Park, Environmental Listing: 4.2 S4 G4, iNat Observations; CalFlora Observations; M. Roddy 7 [LOB], Ron Vanderhoff 1138 [IRVC]
NATURALIZED (native to Europe, n. Africa, and s.w. and c. Asia), iNat Observations; CalFlora Observations
Stachys rigida Nutt. ex Benth. - Rigid Hedge-Nettle
NATIVE Note: Not determined to subspecies, iNat Observations
Calochortus catalinae S.Watson - Catalina Mariposa Lily
NATIVE, Environmental Listing: 1B.3 S2? G4T2?; iNat Observations
NATIVE Note: Not determined to variety, iNat Observations
NATURALIZED (native to Europe, Mediterranean, India), iNat Observations; CalFlora Observations
PERSISTING FROM CULTIVATION (native to northeastern Australia), CalFlora Observations
PERSISTING FROM CULTIVATION (native to southeastern Australia), iNat Observations; CalFlora Observations; Ron Vanderhoff 1153 [IRVC]
PERSISTING FROM CULTIVATION (native to southeastern Australia), iNat Observations; CalFlora Observations; Ron Vanderhoff 1152 [IRVC]
PERSISTING FROM CULTIVATION (native to western Australia), CalFlora Observations
NATIVE Note: Not determined to variety, iNat Observations
NATURALIZED (native to Eurasia), iNat Observations; CalFlora Observations
NATURALIZED (native to western Asia), iNat Observations; CalFlora Observations
Clarkia bottae (Spach) F.H. Lewis & M.E. Lewis - Botta's Clarkia, Punchbowl Godetia
NATIVE Note: Not determined to subspecies, iNat Observations
Epilobium canum (Greene) P.H. Raven - California Fuchsia, Hummingbird Trumpet
NATIVE Note: Not determined to subspecies, iNat Observations
Oenothera elata Kunth - Tall Evening-Primrose
NATURALIZED (native New Mexico to central United States, central Mexico), iNat Observations
NATIVE Note: Not determined to species, iNat Observations
NATIVE Note: Not determined to subspecies, iNat Observations; Fred M. Roberts 3297 [RSA]
Castilleja subinclusa Greene - longleaf Indian paintbrush
NATIVE Note: there is some discussion of the species in the park. Further review and collection needed. May be moved to an "Omitted and Questionable" list, iNat Observations
Cordylanthus rigidus (Benth.) Jeps. - Stiffbranch Bird’s Beak
Oxalis corniculata L. - yellow wood sorrel
NATURALIZED (native to mediterranean Europe), iNat Observations; CalFlora Observations
Oxalis pes-caprae L. - African Wood-Sorrel
NATURALIZED (native to Southern Africa), iNat Observations; CalFlora Observations
Diplacus brevipes (Benth.) G.L.Nesom - Slope Semiphore, Widethroat Yellow Monkeyflower
Diplacus longiflorus Nutt. - Santa Susana bush monkeyflower
Diplacus puniceus Nutt. - Coast Monkey Flower
NATURALIZED (native location uncertain) Note: not determined to species, iNat Observations
Callitriche heterophylla Pursh - differentleaf waterstarwort
NATIVE Note: Not determined to subspecies, iNat Observations
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
Plantago major L. - rippleseed plantain
NATIVE Note: Not determined to subspecies. Recent work includes those previously treated as Antirrhinum nuttalianum, iNat Observations
NATIVE Note: Not determined to variety, iNat Observations
Arundo donax L. - Giant Reed
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
Avena barbata Pott ex Link - Slender Wild Oat
NATURALIZED (native to southern Europe, northern Africa to India), iNat Observations
Avena fatua L. - Insipid Wild Oat
NATURALIZED (native to Eurasia), iNat Observations
NATURALIZED (native to Southern Europe), iNat Observations
Bromus diandrus Roth - Ripgut Grass
NATURALIZED (native to Europe), iNat Observations
NATURALIZED (native to Europe); A. Lewis 387 [UCJEPS]
Bromus madritensis L. - Madrid Brome
NATURALIZED (native to Europe), iNat Observations
Bromus rubens L. - Red Brome
NATURALIZED (native to Europe), iNat Observations
Cenchrus ciliaris L. - buffelgrass
NATURALIZED (native to Africa, western Asia, India), iNat Observations; CalFlora Observations; Ron Vanderhoff 1165 [IRVC]
Cenchrus setaceus (Forssk.) Morrone - African Fountain Grass
NATURALIZED (native to Africa), iNat Observations; CalFlora Observations
Hordeum murinum L. - Wall Barley
NATURALIZED (native to Europe, Mediterranean), iNat Observations
NATURALIZED (native to Mediterranean), iNat Observations
Melica imperfecta Trin. - Coast Range Melic
NATURALIZED (native to southern and western Europe), iNat Observations; CalFlora Observations
Schismus barbatus (L.) Thell. - Mediterranean Schismus
NATURALIZED (native to southern Europe), iNat Observations
NATURALIZED (native to Europe, northern Africa, western Asia), Note: Treated as Oloptum miliaceum (L.) Röser & Hamasha in some works, e.g., iNaturalist; iNat Observations; CalFlora Observations; Ron Vanderhoff 1084 [IRVC]
NATURALIZED (probably native to Europe), iNat Observations
Linanthus dianthiflorus (Benth.) Greene - Fringed Linanthus, Ground Pink
Eriogonum elongatum Benth. - Long-Stem Wild Buckwheat
Eriogonum fasciculatum Benth. - California Buckwheat
NATIVE Note: Not determined to variety, iNat Observations
Eriogonum gracile Benth. - Slender Buckwheat
NATURALIZED (origins uncertain, obscure) Note: Not determined to subspecies, iNat Observations
Rumex crispus L. - Curly Dock
NATURALIZED (native to Eurasia), iNat Observations; CalFlora Observations
Portulaca oleracea L. - Common Purslane
NATURALIZED (probably native to eastern hemisphere), iNat Observations; CalFlora Observations; Ron Vanderhoff 1127 [IRVC]
Adiantum jordanii C.H. Mull. - California Maidenhair Fern
Delphinium parryi A. Gray - Parry’s Larkspur
Ranunculus californicus Benth. - California Buttercup
NATIVE Note: Not determined to variety, iNat Observations
Ceanothus crassifolius Torr. - Hoaryleaf Ceanothus
NATIVE Note: Not determined to subspecies, iNat Observations
NATIVE Note: Not determined to variety, iNat Observations; CalFlora Observations
Cercocarpus betuloides Nutt. - Birch-Leaf Mountain-Mahogany
NATIVE Note: Not determined to variety, iNat Observations
NATIVE Note: Not determined to subtaxa, iNat Observations
Galium aparine L. - Common Bedstraw, Goose Grass
NATURALIZED (native to Europe, North Africa, Asia. Note: some references say native to N. Am., including California), iNat Observations
Galium nuttallii A. Gray - San Diego Bedstraw
Galium parisiense L. - Wall Bedstraw
NATURALIZED (native to Mediterranean), iNat Observations
Citrus aurantium L. - bergamot orange
PERSISTING FROM CULTIVATION (native to southeast Asia), iNat Observations
PERSISTING FROM CULTIVATION (native to Asia, India, Myanmar or China), iNat Observations
Salix exigua Nutt. - Narrow-Leaf Willow
NATURALIZED (native to Eurasia), iNat Observations
NATURALIZED (native to China), iNat Observations; CalFlora Observations
NATURALIZED (native to South America), iNat Observations; CalFlora Observations
Solanum douglasii Dunal - Douglas’s Nightshade
Solanum elaeagnifolium Cav. - white horsenettle
NATURALIZED (native to central United States, northern Mexico), iNat Observations; CalFlora Observations
NATIVE Note: Not determined to variety, iNat Observations
Dipterostemon capitatus (Benth.) Rydb. - Blue Dicks, School Bells
NATIVE Note: Not determined to subspecies, iNat Observations
Urtica dioica L. - Tall Nettle
Urtica urens L. - Dwarf Nettle
NATURALIZED (native to Europe), iNat Observations; CalFlora Observations
Verbena lasiostachys Link - Western Vervain
NATIVE Note: Not determined to subtaxa, iNat Observations
NATIVE, ; Note: S. nigra L. subsp. caerulea (Raf.) Bolli now considered a synonym; iNat Observations; CalFlora Observations
Vitis girdiana Munson - Southern California Wild Grape
Tribulus terrestris L. - Puncture Vine
NATURALIZED (native to Mediterranean), CalFlora Observations