Taxon Report

Eriogonum ovalifolium Nutt. var. eximium (Tides.) J.T. Howell

brown-margined buckwheat

Print Report

Taxon Summary

Eriogonum ovalifolium var. eximium, commonly known as brown-margined buckwheat, is a perennial herb in the Polygonaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, and Subalpine coniferous forest, growing at elevations from 1800 to 3400 meters. Eriogonum ovalifolium var. eximium is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Eriogonum ovalifolium Nutt. var. eximium (Tides.) J.T. Howell
Common Name:	brown-margined buckwheat
Family:	Polygonaceae
Element Code:	PDPGN084FD
USDA Plants Symbol:	EROVE
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Aug	Jun-Aug
Elevation:	1800-3400 (5905-11155)
General Habitats:	Alpine boulder and rock field, Subalpine coniferous forest
Microhabitat:	Granitic, Sandy
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G5T2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


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

Location


California Endemic: False
California Counties and Islands: Name (Code)
El Dorado (ELD)
Quads: Name (Quad Code)
Robbs Peak (3812084)

Threat List Data from the CNDDB


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

Notes



Intergrades with var. nivale. See Proceedings of the Biological Society of Washington 36:181 (1923) for original description, Mentzelia 1:19 (1976) for revised nomenclature, and Phytologia 66(4):335-336 (1989) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 3 July 2025].