Taxon Report

Silene marmorensis Kruckeberg

Marble Mountain campion

Print Report

Taxon Summary

Silene marmorensis, commonly known as Marble Mountain campion, is a perennial herb in the Caryophyllaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 170 to 1250 meters. Silene marmorensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Silene marmorensis Kruckeberg
Common Name:	Marble Mountain campion
Family:	Caryophyllaceae
Element Code:	PDCAR0U0Z0
USDA Plants Symbol:	SIMA5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	170-1250 (560-4100)
General Habitats:	Broadleafed upland forest, Chaparral, Cismontane woodland, Lower montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	41
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	8
Fair (C)	7
Poor (D)	2
None (X)	0
Unknown (U)	22

Location


California Endemic: True
California Counties and Islands: Name (Code)
Siskiyou (SIS)
Quads: Name (Quad Code)
Cecilville (4112322), Forks of Salmon (4112333), Medicine Mtn. (4112343), Orleans Mtn. (4112334), Sawyers Bar (4112332), Somes Bar (4112344), Youngs Peak (4112323)

Threat List Data from the CNDDB


Threat List Total:	10
EOs with Threat Listed:	Total EOs	% of EOs
	37	90 %
Logging	22	53%
Road/trail construction/maint.	20	48%
Recreational use (non-ORV)	10	24%
Mining	4	9%
Grazing	4	9%
Other	3	7%
Foot traffic/trampling	2	4%
Biocides	1	2%
Improper burning regime	1	2%
Wood cutting or brush clearing	1	2%

Notes



Need quads for HUM Co. Threatened by logging. Closely related to S. bridgesii. See Madroño 15(6):172-177 (1960) for original description.
Threats:

Taxonomy:

Selected References

Silene marmorensis account for potential Species of Conservation Concern evaluation (2021)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 December 2025].