CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record chorizanthe_valida - Wed, Dec. 1, 2021, 23:27 ET b
Chorizanthe valida
common nameSonoma spineflower
CalPhotos image
more photos
© 2000 Doreen Smith  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S1      ranking system key
global rank
G1     G1: Less than 6 occurrences OR less than 1,000 individuals OR less than 2,000 acres.
Where did the "RED" code go?
CA state listingEndangered  01/90
federal listingEndangered  06/22/92
where found
MAPS - Use v8 link below.

Topographic quads (6):
Point Bonita (467D)* 3712275, Petaluma (484B)?* 3812226, Drakes Bay (485C) 3812218, Sonoma (500C)* 3812234, Sebastopol (502A)* 3812247, Fort Ross (519C)* 3812352
quad data info

Counties, states, regions:
Marin (MRN), Sonoma (SON)*
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Coastal prairie (CoPrr)(sandy)
blooming period Jun-Aug  
elevation range10 - 305 meters
Thought extinct for 77 years; only known extant occurrence was rediscovered in 1980 at Pt. Reyes NS. Experimental introduction work ongoing as of 2000. Closely related to C. pungens. See Proceedings of the American Academy of Arts and Sciences 12:271 (1877) for original description, Phytologia 66(2):132-134 (1989) for taxonomic treatment, Fremontia 18(1):17-18 (1990) for species account, and Madroņo 39(4):271-280 (1992) and 40(4):285-288 (1993) for discussion of grazing effects.
full nameChorizanthe valida Wats.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  CHVA Element Code  PDPGN040V0
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Wed, Dec. 1, 2021 from

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