Taxon Report

Clarkia lingulata Lewis & Lewis

Merced clarkia

Print Report

Taxon Summary

Clarkia lingulata, commonly known as Merced clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 400 to 455 meters. Clarkia lingulata is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Clarkia lingulata Lewis & Lewis
Common Name:	Merced clarkia
Family:	Onagraceae
Element Code:	PDONA050P0
USDA Plants Symbol:	CLLI
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Jun	May-Jun
Elevation:	400-455 (1310-1495)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	CE
Fed List:	None
Other Status:	SB_CalBG/RSABG; SB_UCBG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	2
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Mariposa (MPA)
Quads: Name (Quad Code)
Kinsley (3711968)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	2	100 %
Biocides	2	100%
Erosion/runoff	2	100%
Non-native plant impacts	2	100%
Road/trail construction/maint.	2	100%
Grazing	1	50%

Notes



Known from only two occurrences along the Merced River. Largest occurrence damaged by herbicide spraying in 1984; also possibly threatened by road widening. Multiagency conservation agreement signed in 1994. See Madroño 12(2):35 (1953) for original description.
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 5 February 2025].