Taxon Details

Camissonia integrifolia

Kern River evening-primrose

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Taxon Summary:

Camissonia integrifolia, commonly known as Kern River evening-primrose, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, and Mojavean desert scrub, growing at elevations from 700 to 1200 meters. Camissonia integrifolia is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Camissonia integrifolia Raven
Common Name: Kern River evening-primrose
Family:	Onagraceae
Element Code:	PDONA030T0
USDA Plants Symbol:	CAIN22
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S
CRPR Changes:
Add Date:	1980-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: (Apr)May

Elevation:
700 - 1200 meters
2295 - 3935 feet

General Habitats:

Chaparral
Mojavean desert scrub

Microhabitat Details: Toeslopes and terraces along drainages

Microhabitat:

Openings
Sandy

Notes

Notes: Rediscovered to science in 2015 after many decades without observation.
Threats: Potentially threatened by road maintenance.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	2	33 %
Foot traffic/trampling	1	16%
Road/trail construction/maint.	1	16%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					6
A	B	C	D	X	U
0	0	1	0	0	5

Occurrence Status:
Historical >20 Years	4
Recent <=20 Years	2

Presence:
Presumed Extant	6
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Kern (KRN)

Quads: Name (Quad Code)
Cane Canyon (3511852), Horse Canyon (3511851), Miracle Hot Springs (3511855), Onyx (3511862), Weldon (3511863), Woolstalf Creek (3511853)

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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Original Description:	Contributions from the U.S. National Herbarium 37(5): 344 (1969)
Other:	Fremontia 43(3): 24-25 (2015) [notes on rediscovery]

CNPS Rare Plant Inventory