Taxon Report

Silene occidentalis S. Watson ssp. occidentalis

Western campion

Print Report

Taxon Summary

Silene occidentalis ssp. occidentalis, commonly known as Western campion, is a perennial herb in the Caryophyllaceae that is found only in California. It occurs within Chaparral, Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 1030 to 2090 meters. Silene occidentalis ssp. occidentalis is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Silene occidentalis S. Watson ssp. occidentalis
Common Name:	Western campion
Family:	Caryophyllaceae
Element Code:	PDCAR0U162
USDA Plants Symbol:	SIOCO
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	1030-2090 (3380-6855)
General Habitats:	Chaparral, Lower montane coniferous forest, Upper montane coniferous forest
Microhabitat:	Dry, Openings, Rocky (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 4.3 on 2010-03-04

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)
Butte (BUT), Lassen (LAS), Nevada (NEV), Plumas (PLU), Shasta (SHA), Tehama (TEH)
Quads: Name (Quad Code)
Antelope Mtn. (4012058), Bullard Lake (4012078), Graniteville (3912046), Grays Peak (4012146), Jonesville (4012114), Manton (4012147), Pegleg Mtn. (4012048), Pondosa (4112126), Storrie (3912183), Swain Mountain (4012141), Viola (4012156), West Prospect Peak (4012154), Westwood West (4012131)

Threat List Data from the CNDDB


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

Notes



Possibly threatened by grazing. A synonym of S. occidentalis in TJM 2.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2010-03-04

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].