Taxon Report

Eriogonum collinum Jones

hill buckwheat

Print Report

Taxon Summary

Eriogonum collinum, commonly known as hill buckwheat, is a annual herb in the Polygonaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 1300 to 1800 meters. Eriogonum collinum is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Eriogonum collinum Jones
Common Name:	hill buckwheat
Family:	Polygonaceae
Element Code:	PDPGN08160
USDA Plants Symbol:	ERCO10
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Jun-Sep	Jun-Sep
Elevation:	1300-1800 (4265-5905)
General Habitats:	Great Basin scrub, Pinyon and juniper woodland
Microhabitat:	Clay
Microhabitat Details:	vertisol clay

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G4
State Rank:	S3
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)
Lassen (LAS)
Quads: Name (Quad Code)
Buckhorn Canyon (4012071), Bull Flat (4012041), Five Springs (4012052), Karlo (4012053), Litchfield (4012044), Little Hat Mtn. (4112011), Little Mud Flat (4012042), McDonald Peak (4012084), Petes Valley (4012054), Ravendale (4012073), Shaffer Mtn. (4012043), Shinn Mtn. (4012062), Snowstorm Mtn. (4012063), Termo (4012074), West of Snowstorm Mtn. (4012064)

Threat List Data from the CNDDB


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

Notes



Possibly threatened by pipeline construction. Not in The Jepson Manual. See Contributions to Western Botany 11:15 (1903) for original description, and Phytologia 66(4):368-369 (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].