CNPS Inventory Plant Detail

Chorizanthe valida

Common Name:	Sonoma spineflower
Family:	Polygonaceae
Synonyms:
Element Code:	PDPGN040V0
Full Name:	Chorizanthe valida Wats.
USDA PLANTS Symbol:	CHVA

Biology
Lifeform: annual herb Blooming Period: June - August Habitat: • Coastal prairie (sandy)

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: FE Endangered (06/22/92) State Listing Status: CE Endangered (01/90) State Rank: S1 S1: Critically Imperiled. Global Rank: G1 G1: Critically Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 6
Element Occurrence Ranks:

A B C D X U

0 3 0 0 3 0

Population Status:

Historic >20 yrs	Recent <=20 yrs
3	3

Presence:

Present Extant	Possibly Extirpated	Extirpated
3	3	0

Notes

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 Madroño 39(4):271-280 (1992) and 40(4):285-288 (1993) for discussion of grazing effects.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2010-03-15

Location

Elevation: 10 - 305 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Marin (MRN), Sonoma (SON) *

Quads: name (DWR code) USGS code
Point Bonita (467D)* 37122G5, Petaluma (484B)?* 38122B6, Drakes Bay (485C) 38122A8, Sonoma (500C)* 38122C4, Sebastopol (502A)* 38122D7, Fort Ross (519C)* 38123E2

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

477

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-122.625,38.125