Taxon Report

Rosa gymnocarpa Nutt. var. serpentina Ertter & W.H. Lewis

Gasquet rose

Print Report

Dean Wm. Taylor, 2020

Taxon Summary

Rosa gymnocarpa var. serpentina, commonly known as Gasquet rose, is a perennial rhizomatous shrub in the Rosaceae that is found in California and elsewhere. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 400 to 1725 meters. Rosa gymnocarpa var. serpentina is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Rosa gymnocarpa Nutt. var. serpentina Ertter & W.H. Lewis
Common Name:	Gasquet rose
Family:	Rosaceae
Element Code:	PDROS1J1V1
USDA Plants Symbol:	ROGYS
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous shrub
Blooming Period: Apr-Jun(Aug)	Apr-Jun(Aug)
Elevation:	400-1725 (1310-5660)
General Habitats:	Chaparral, Cismontane woodland
Microhabitat:	Openings, Roadsides (often), Serpentine, Streambanks
Microhabitat Details:	sometimes ridges

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G5T3T4
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_BerrySB; SB_CalBG/RSABG
CRPR Changes:	added to 1B.3 on 2011-11-30

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Siskiyou (SIS)?
Quads: Name (Quad Code)
City of Mount Shasta (4112233), Gasquet (4112378), Grouse Mtn. (4012376), Hurdygurdy Butte (4112377), Preston Peak (4112375)?, Willow Creek (4012386)

Threat List Data from the CNDDB


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

Notes



Known only from the Siskiyou Mtns. Of CA and OR. Identification of specimen from SIS Co. needs verification; field surveys needed. Similar to R. spithamea. Not in TJM (1993).
Threats:
Possibly threatened by foot traffic and vehicles.
Taxonomy:

Selected References

Proposed New Add to Rank 1B.3, G5T2T3 / S2

Madroño 55(2):170-177 (2008)

Rosa gymnocarpa var. serpentina profile for potential Species of Conservation Concern evaluation (2022)

Rosa gymnocarpa var. serpentina profile for potential Species of Conservation Concern evaluation (2022)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 2 November 2025].