Taxon Report

Eriogonum heermannii Dur. & Hilg. var. floccosum Munz

Clark Mountain buckwheat

Print Report

Taxon Summary

Eriogonum heermannii var. floccosum, commonly known as Clark Mountain buckwheat, is a perennial deciduous shrub in the Polygonaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland, growing at elevations from 900 to 2400 meters. Eriogonum heermannii var. floccosum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Eriogonum heermannii Dur. & Hilg. var. floccosum Munz
Common Name:	Clark Mountain buckwheat
Family:	Polygonaceae
Element Code:	PDPGN082P3
USDA Plants Symbol:	ERHEF
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial deciduous shrub
Blooming Period: Aug-Oct	Aug-Oct
Elevation:	900-2400 (2955-7875)
General Habitats:	Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G5T4
State Rank:	S4
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
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)
San Bernardino (SBD)
Quads: Name (Quad Code)
Bighorn Basin (3411576), Blackwater Mine (3511577), Castle Peaks (3511532), Cima (3511525), Cima Dome (3511535), Clark Mtn. (3511555), Colton Well (3411584), Columbia Mtn. (3511514), Fountain Peak (3411585), Hackberry Mountain (3511512), Hart Peak (3511531), Ivanpah (3511533), Ivanpah Lake (3511554), Kelso (3511516), Mescal Range (3511545), Mid Hills (3511524), Mineral Hill (3511544), Old Woman Statue (3411552), Ord Mountain (3411667), Pachalka Spring (3511556), Pinto Valley (3511523), Red Pass Lake Ne (3511643), Solomons Knob (3511547), State Line Pass (3511564), Turquoise Mtn. (3511548), Valley Wells (3511546)

Threat List Data from the CNDDB


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

Notes



See Phytologia 66(4):314-316 (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].