Taxon Report

Camissoniopsis guadalupensis (S. Watson) W.L. Wagner & Hoch ssp. clementina (P.H. Raven) W.L. Wagner & Hoch

San Clemente Island evening-primrose

Print Report

Taxon Summary

Camissoniopsis guadalupensis ssp. clementina, commonly known as San Clemente Island evening-primrose, is a annual herb in the Onagraceae that is found only in California. It occurs within Coastal dunes, growing at elevations from 0 to 30 meters. Camissoniopsis guadalupensis ssp. clementina is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Camissoniopsis guadalupensis (S. Watson) W.L. Wagner & Hoch ssp. clementina (P.H. Raven) W.L. Wagner & Hoch
Common Name:	San Clemente Island evening-primrose
Family:	Onagraceae
Element Code:	PDONA030M1
USDA Plants Symbol:
Synonyms/Other Names:	Camissonia guadalupensis ssp. clementina

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Jun	Apr-Jun
Elevation:	0-30 (0-100)
General Habitats:	Coastal dunes
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G3T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; SB_CRES
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	8
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	8

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX)
Quads: Name (Quad Code)
San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	2	25 %
Development	1	12%
Non-native plant impacts	1	12%

Notes



See Aliso 5:332 (1963) for original description, Brittonia 16:284 (1964) for revised nomenclature, and Contributions from the U.S. National Herbarium 37(5):275 (1969) for taxonomic treatment.
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 28 October 2025].