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Home >> Checklist of the Vascular Flora of Santa Rosa Island

Checklist of the Vascular Flora of Santa Rosa Island

Authors: Kristen Hasenstab-Lehman and C. Matt Guilliams
Citation: K.E. Hasenstab-Lehman C.M. Guilliams, 2021. Checklist of the Vascular Flora of Santa Rosa Island, California, Version 1. Originally published online February 22, 2021, updated continually thereafter. www.cch2.org.
Locality: Santa Rosa Island, Channel Islands National Park
Abstract: This is a voucher-based checklist of Santa Rosa Island, one of the California Channel Islands off the coast of California. Data for the checklist came from study of specimens deposited in herbaria. All information was cross-referenced against Wallace (1985), and Ratay et al. (2014), along with the latest taxonomic treatments in regional floras (e.g., The Jepson eFlora, https://ucjeps.berkeley.edu/eflora/). In some cases, taxonomic experts were consulted to assist with determinations. This list will be continually updated.
less detail
Families: 86.
Genera: 301.
Species: 528.
Total Taxa: 541.
Page 1 of 2: 1 | 2
Acmispon argophyllus var. argenteus (Dunkle) Brouillet
Channel Islands endemic; a species of environmental concern.; Abrams, L. R.... 239 [CAS]
Aesculus parryi A. Gray
Single collection; needs herbarium study; Guy L. Fleming s.n. [SD]
Agave americana L.
Non-native taxon.
Agrostis stolonifera L.
Non-native taxon.
Amaranthus albus L.
Non-native taxon; single collection from 1930 possible waif.; Ralph Hoffmann 1930-06-12 [SBBG]
Anthemis cotula L.
Non-native taxon; waif? No vouchers located.
Arctium minus (Hill) Bernh.
Non-native taxon; single collection from 1994.; S. Chaney 1994-00-00 [SBBG]
Aristida adscensionis L.
No vouchers found.
Arundo donax L.
Non-native taxon; single collection from 1998.; S. A. Junak SR-887 [SBBG]
Atriplex pacifica A. Nelson
CA native taxon; represented by a single collection from 1932.; Ralph Hoffmann 1932-05-06 [SBBG]
Baccharis salicifolia subsp. salicifolia
This taxon requires herbarium study to confirm vouchers
Berberis pinnata subsp. insularis Munz
Channel Islands endemic taxon; a species of environmental concern; Ralph Hoffmann 1930-12-06 [SBBG]
Beta vulgaris subsp. maritima (L.) Arcang.
Non-native taxon; no vouchers located
Boechera hoffmannii (Munz) Al-Shehbaz
Channel Islands endemic; a species of environmental concern, last collected in 1930; Ralph Hoffmann 1930-12-05 [SBBG]
Brassica nigra (L.) W.D.J. Koch
Non-native taxon; single collection from 1979.; M. Daily SR 169 [SBBG]
Brassica rapa L.
Non-native taxon; no vouchers located
Bromus berteroanus Colla
Non-native taxon; single collection from 1930.; Ralph Hoffmann 1930-04-08 [SBBG]
Calochortus luteus Douglas ex Lindl.
No vouchers located; needs herbarium study
Carex gracilior Mack.
CA native taxon; collected one time in 1977.; Robert F. Thorne 48709 [RSA]
Carex harfordii Mack.
CA native taxon; collected one time in 2001.; Dirk Rodriguez s.n. [SBBG]
Castilleja mollis Pennell
Channel Islands endemic taxon; a species of environmental concern
Cercocarpus betuloides var. blancheae (C.K. Schneid.) Little
Channel Islands endemic taxon; a variety of environmental concern last collected in 1932; Ralph Hoffmann s.n. [RSA]
Crocanthemum greenei (B.L. Rob.) Sorrie
Channel Islands endemic taxon; a species of environmental concern; S. Chaney 1999-04-26 [SBBG], Carl Epling s.n. [LA]
Cuscuta pacifica var. pacifica
No voucher located; needs herbarium study.
Delairea odorata Lem.
Non-native taxon; single collection from 1978; S. A. Junak SR-211 [SBBG]
Diplacus longiflorus Nutt.
Vouchers need herbarium study.
Dudleya gnoma S. McCabe
Channel Islands endemic taxon; a species of environmental concern; S. W. McCabe 792 [SBBG], S. A. Junak SR-398 [SBBG], Reid Moran 3364 [SBBG]
Eleocharis palustris (L.) Roem. & Schult.
Single collection from 1930; needs herbarium study; Phillip A. Munz 11728 [RSA]
Erigeron bonariensis L.
Non-native taxon; needs herbarium study to annotate vouchers.
Eriogonum cinereum Benth.
CA native taxon; collected one time in 1922, requires herbarium study; Mary F. Spencer s.n. [RSA]
Eucalyptus camaldulensis Dehnh.
Non-native taxon; single collection from 1965; R. N. Philbrick... B65-1152 [SBBG]
Eulobus californicus Nutt. ex Torr. & A. Gray
CA native taxon; single collection from 1927, needs herbarium study; Ralph Hoffmann 1927-03-26 [SBBG]
Eurybia radulina (A. Gray) G.L. Nesom
Single collection from 1929; needs herbarium study; Ralph Hoffmann 1929-04-17 [SBBG]
Galium angustifolium subsp. angustifolium
Single collection from 1991; needs herbarium study; S. A. Junak SR-442 [SBBG]
Galium buxifolium Greene
Channel Islands endemic taxon; a species of environmental concern
Galium porrigens var. porrigens
No vouchers located; needs herbarium study
Gilia angelensis V.E. Grant
CA endemic taxon; single collection from 1932, needs herbarium study; Ralph Hoffmann 1932-04-18 [SBBG]
Herniaria hirsuta var. cinerea (DC.) Loret & Barrandon
Non-native taxon; single collection from 1994 needs further study; K. Rindlaub SR94-107 [SBBG]
Hesperocnide tenella Torr.
No vouchers located; needs herbarium study.
Hordeum murinum subsp. glaucum (Steud.) Tzvelev
Non-native taxon; subspecies need herbarium study
Juncus balticus subsp. ater (Rydb.) Snogerup
Single collection from 1949; needs herbarium study; C. F. Smith 2529 [RSA]
Leptosiphon bicolor Nutt.
Herbarium study needed; single collection from 1977; Robert F. Thorne 48860 [CATA]
Logfia gallica (L.) Coss. & Germ.
Non-native taxon; single collection from 1997; S. A. Junak SR-730 [SBBG]
Lonicera subspicata var. subspicata
No vouchers located; needs herbarium study.
Malva nicaeensis All.
Non-native taxon; first collected in 1978; S. A. Junak SR-201 [SBBG], M. Daily SR66 [SBBG]
Medicago sativa L.
Non-native taxon; single collection from 1929, requires herbarium study; Ralph Hoffmann 1929-04-18 [SBBG]
Micranthes californica (Greene) Small
No vouchers located; needs herbarium study.
Oenothera xenogaura W.L. Wagner & Hoch
Non-native taxon; collected one time in 1988; Don Pendleton s.n. [UCR]
Pelargonium sp.
No voucher located; waif?
Phalaris aquatica L.
Non-native taxon; single collection from 2013, needs herbarium study; K. Niessen 2013-05-19 [SBBG]
Phalaris minor Retz.
Non-native taxon; single collection from 1930; Ralph Hoffmann 1930-04-08 [SBBG]
Rumex conglomeratus Murray
Non-native taxon; no vouchers located.
Sagina apetala Ard.
Non-native taxon; single collection from 1993; S. A. Junak SR-610 [SBBG]
Salsola australis R. Br.
More study needed, no vouchers located
Schinus molle L.
Non-native taxon; growing along ranch fenceline; Steven A. Junak SR-695 [SBBG], M. Daily SR 238 [SBBG]
Scutellaria tuberosa Benth.
Single collection from 1995; needs further study; Dan Richards SC453 [SBBG]
Senecio aphanactis Greene
CA native taxon; a species of environmental concern last collected in 1929; Ralph Hoffmann 1929-04-16 [SBBG], Ralph Hoffmann 1929-04-15 [SBBG]
Stephanomeria diegensis Gottlieb
No vouchers located; needs herbarium study
Stipa miliacea var. miliacea
Non-native taxon; first collected in 1929
Stuckenia pectinata (L.) Börner
Single collection from 1977; needs herbarium work; Robert F. Thorne 48784 [RSA]
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