Taxon Report

Clarkia lewisii Raven & Parnell

Lewis' clarkia

Print Report

Taxon Summary

Clarkia lewisii, commonly known as Lewis' clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, Closed-cone coniferous forest, and Coastal scrub, growing at elevations from 30 to 1195 meters. Clarkia lewisii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Clarkia lewisii Raven & Parnell
Common Name:	Lewis' clarkia
Family:	Onagraceae
Element Code:	PDONA050N0
USDA Plants Symbol:	CLLE2
Synonyms/Other Names:	Clarkia bottae (Spach) Lewis & Lewis

Ecology and Life History


Lifeform:	annual herb
Blooming Period: (Feb)May-Jul	(Feb)May-Jul
Elevation:	30-1195 (100-3920)
General Habitats:	Broadleafed upland forest, Chaparral, Cismontane woodland, Closed-cone coniferous forest, Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; SB_SBBG
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), Monterey (MNT), San Benito (SBT), Santa Clara (SCL)
Quads: Name (Quad Code)
Bickmore Canyon (3612152), Big Sur (3612137), Burro Mountain (3512173), Cape San Martin (3512184), Carmel Valley (3612146), Chews Ridge (3612135), Cone Peak (3612114), Cosio Knob (3612112), Espinosa Canyon (3612111), Gonzales (3612154), Hollister (3612174), Junipero Serra Peak (3612124), Lopez Point (3612115), Los Gatos (3712128), Marina (3612167), Monterey (3612158), Mount Johnson (3612153), Mt. Carmel (3612147), Mt. Harlan (3612164), Natividad (3612165), North Chalone Peak (3612142), Paraiso Springs (3612133), Partington Ridge (3612126), Pfeiffer Point (3612127), Point Sur (3612138), Rana Creek (3612145), Salinas (3612166), San Jose West (3712138), San Juan Bautista (3612175), Seaside (3612157), Smith Mountain (3612015), Soberanes Point (3612148), Soledad (3612143), Spreckels (3612156), Sycamore Flat (3612134), Tassajara Hot Springs (3612125), Ventana Cones (3612136), Villa Creek (3512174), Williams Hill (3512181)

Threat List Data from the CNDDB


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

Notes



Possibly threatened by non-native plants. Can be confused with C. jolonensis. See Annals of the Missouri Botanical Garden 64:642 (1977) for revised taxonomy.
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 8 February 2025].