Taxon Report

Eriogonum nervulosum (S. Stokes) Rev.

Snow Mountain buckwheat

Print Report

Taxon Summary

Eriogonum nervulosum, commonly known as Snow Mountain buckwheat, is a perennial rhizomatous herb in the Polygonaceae that is found only in California. It occurs within Chaparral, growing at elevations from 300 to 2105 meters. Eriogonum nervulosum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Eriogonum nervulosum (S. Stokes) Rev.
Common Name:	Snow Mountain buckwheat
Family:	Polygonaceae
Element Code:	PDPGN08440
USDA Plants Symbol:	ERNE8
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	300-2105 (985-6905)
General Habitats:	Chaparral
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:	BLM_S; SB_CalBG/RSABG; SB_SBBG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	9
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	2
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	3

Location


California Endemic: True
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Lake (LAK), Napa (NAP), Sonoma (SON)
Quads: Name (Quad Code)
Crockett Peak (3912247), Gilmore Peak (3912235), Hough Springs (3912225), Jericho Valley (3812274), Knoxville (3812273), Leesville (3912224), Mount St. Helena (3812266), St. John Mtn. (3912246), Whispering Pines (3812276), Wilson Valley (3812284)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	3	33 %
Development	1	11%
Mining	1	11%
ORV activity	1	11%
Road/trail construction/maint.	1	11%

Notes



Known from fewer than twenty occurrences. Threatened by energy development, mining, and vehicles. See Phytologia 40:467 (1978) for revised nomenclature and 66(4):350 (1989) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Eriogonum nervulosum profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 29 October 2025].