Taxon Report

Clarkia exilis Lewis & Vasek

slender clarkia

Print Report

Taxon Summary

Clarkia exilis, commonly known as slender clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Cismontane woodland, growing at elevations from 120 to 1000 meters. Clarkia exilis is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Clarkia exilis Lewis & Vasek
Common Name:	slender clarkia
Family:	Onagraceae
Element Code:	PDONA050G0
USDA Plants Symbol:	CLEX
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-May	Apr-May
Elevation:	120-1000 (395-3280)
General Habitats:	Cismontane woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_UCBG
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Kern (KRN), Tulare (TUL), Ventura (VEN)
Quads: Name (Quad Code)
Alta Sierra (3511865), Camp Wishon (3611826), Democrat Hot Springs (3511856), Glennville (3511866), Lamont Peak (3511871), Mt. Adelaide (3511846), Oil Center (3511848), Onyx (3511862), Pine Flat Dam (3611973), Pine Mountain (3511857), Piru (3411847), Posey (3511876), Rio Bravo Ranch (3511847), Sand Canyon (3511868), Success Dam (3611818), Weldon (3511863), White River (3511877), Woody (3511867)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes



See Evolution 18:26-42 (1964) for occurrence information.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 2 March 2025].