Taxon Report

Silene suksdorfii Rob.

Cascade alpine campion

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Taxon Summary

Silene suksdorfii, commonly known as Cascade alpine campion, is a perennial herb in the Caryophyllaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Subalpine coniferous forest, and Upper montane coniferous forest, growing at elevations from 2355 to 3110 meters. Silene suksdorfii is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Silene suksdorfii Rob.
Common Name:	Cascade alpine campion
Family:	Caryophyllaceae
Element Code:	PDCAR0U1W0
USDA Plants Symbol:	SISU
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Sep	Jul-Sep
Elevation:	2355-3110 (7725-10205)
General Habitats:	Alpine boulder and rock field, Subalpine coniferous forest, Upper montane coniferous forest
Microhabitat:	Rocky, Volcanic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G4
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_UCSC
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	10
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	8

Location


California Endemic: False
California Counties and Islands: Name (Code)
Shasta (SHA), Siskiyou (SIS), Tehama (TEH)
Quads: Name (Quad Code)
Lassen Peak (4012145), Manzanita Lake (4012155), McCloud (4112232), Mt. Shasta (4112242), Rainbow Mtn. (4112148)?, Reading Peak (4012144), West Prospect Peak (4012154)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	10 %
Logging	1	10%

Notes



Known in CA only from Mt. Shasta and Mt. Lassen. On review list in ID, and watch list in OR. See Bot. Gaz. 16: 44 (1891) for original description and Madroño 34(1):29-40 (1987) for taxonomic discussion.
Threats:

Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile

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].