Species Details

Clarkia gracilis ssp. albicaulis

white-stemmed clarkia

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Classification

Scientific Name: Clarkia gracilis (Piper) Nels. & Macbr. ssp. albicaulis (Jeps.) Lewis & Lewis
Common Name: white-stemmed clarkia
Family:	Onagraceae
Element Code:	PDONA050J1
USDA Plants Symbol:	CLGRA
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G5T3
State Rank:	S3
Other Status:	BLM_S; SB_UCBG; USFS_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2021-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: May-Jul

Elevation:
245 - 1085 meters
805 - 3560 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Serpentine (sometimes)

Notes

Notes: Threatened by urbanization and non-native plants. Possibly threatened by erosion and road maintenance. See University of California Publications in Botany 2:239 (1907) for original description and 20:241-392 (1955) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	16	50 %
Road/trail construction/maint.	13	40%
Non-native plant impacts	4	12%
Erosion/runoff	2	6%
Logging	1	3%
Mining	1	3%
Recreational use (non-ORV)	1	3%
Vandalism/dumping/litter	1	3%
Biocides	1	3%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					32
A	B	C	D	X	U
4	10	2	0	0	16

Occurrence Status:
Historical >20 Years	24
Recent <=20 Years	8

Presence:
Presumed Extant	32
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Butte (BUT), Tehama (TEH)

Quads: Name (Quad Code)
Acorn Hollow (4012118), Barkley Mtn. (4012126), Berry Creek (3912164), Cherokee (3912165), Cohasset (3912186), Devils Parade Ground (4012116), Forbestown (3912153), Paradise East (3912175), Paradise West (3912176), Pulga (3912174), Richardson Springs (3912177)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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Selected References

Other:

USFS Potential Species of Conservation Concern Profile