Taxon Report

Clarkia breweri (Gray) Greene

Brewer's clarkia

Print Report

Taxon Summary

Clarkia breweri, commonly known as Brewer's clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Coastal scrub, growing at elevations from 215 to 1115 meters. Clarkia breweri is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Clarkia breweri (Gray) Greene
Common Name:	Brewer's clarkia
Family:	Onagraceae
Element Code:	PDONA05080
USDA Plants Symbol:	CLBR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	215-1115 (705-3660)
General Habitats:	Chaparral, Cismontane woodland, Coastal scrub
Microhabitat:	Serpentine (often)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; SB_SBBG; 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)
Alameda (ALA), Fresno (FRE), Merced (MER), Monterey (MNT), Napa (NAP), San Benito (SBT), San Mateo (SMT), Santa Clara (SCL), Santa Cruz (SCR), Sonoma (SON), Stanislaus (STA)
Quads: Name (Quad Code)
Bickmore Canyon (3612152), Calistoga (3812255), Cedar Mtn. (3712155), Cherry Peak (3612162), Copper Mtn. (3712143), Curry Mountain (3612014), Eylar Mtn. (3712145), Hepsedam Peak (3612037), Idria (3612046), Isabel Valley (3712135), Joaquin Rocks (3612034), Kenwood (3812245), Lick Observatory (3712136), Llanada (3612058), Loma Prieta (3712117), Los Banos Valley (3612181), Los Gatos (3712128), Mariposa Peak (3612182), Mississippi Creek (3712124), Mount Johnson (3612153), Mt. Boardman (3712144), Mt. Day (3712146), Mt. Sizer (3712125), Mt. Stakes (3712134), North Chalone Peak (3612142), Ortigalita Peak (3612078), Panoche (3612057), Panoche Pass (3612161), Parkfield (3512084), Patterson (3712142), Priest Valley (3612026), Ruby Canyon (3612171), Rutherford (3812244), San Benito Mtn. (3612036), Santa Rita Peak (3612035), Solyo (3712153), The Dark Hole (3512083), Woodside (3712243)

Threat List Data from the CNDDB


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

Notes



Threatened by cattle grazing, and potentially by reservoir construction.
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 14 March 2025].