Taxon Report

Eriogonum ursinum S. Watson var. erubescens Reveal & J.D. Knorr

blushing wild buckwheat

Print Report

Taxon Summary

Eriogonum ursinum var. erubescens, commonly known as blushing wild buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Chaparral (montane), and Lower montane coniferous forest, growing at elevations from 750 to 1900 meters. Eriogonum ursinum var. erubescens is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Eriogonum ursinum S. Watson var. erubescens Reveal & J.D. Knorr
Common Name:	blushing wild buckwheat
Family:	Polygonaceae
Element Code:	PDPGN08632
USDA Plants Symbol:	ERURE
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	750-1900 (2460-6235)
General Habitats:	Chaparral, Lower montane coniferous forest
Microhabitat:	Rocky, Scree, Talus
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G3G4T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes:	added to 1B.3 on 2006-10-24

Occurrence Data from the CNDDB


Total Occurrences:	36
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	19
Fair (C)	3
Poor (D)	0
None (X)	0
Unknown (U)	9

Location


California Endemic: True
California Counties and Islands: Name (Code)
Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Bully Choop Mtn. (4012257), Carrville (4112216), Damnation Peak (4012285), Hanland Peak (4012283), Indian Creek Baldy (4112267), Lamoine (4012284), Lewiston (4012267), McKinley Mtn. (4112277), Papoose Creek (4012276), Russell Peak (4112268), Schell Mtn. (4012275), Shoeinhorse Mtn. (4112211), Whisky Bill Peak (4112215), Yreka (4112266)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	18	50 %
Logging	14	38%
Road/trail construction/maint.	6	16%
ORV activity	2	5%
Vandalism/dumping/litter	1	2%

Notes



Possibly threatened by road construction and maintenance. See Phytologia 86(3):160-168 (2004) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2006-10-24

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].