Taxon Report

Eriogonum eastwoodianum J.T. Howell

Eastwood's buckwheat

Print Report

Taxon Summary

Eriogonum eastwoodianum, commonly known as Eastwood's buckwheat, is a annual herb in the Polygonaceae that is found only in California. It occurs within Cismontane woodland, and Valley and foothill grassland, growing at elevations from 200 to 1000 meters. Eriogonum eastwoodianum is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Eriogonum eastwoodianum J.T. Howell
Common Name:	Eastwood's buckwheat
Family:	Polygonaceae
Element Code:	PDPGN081V0
USDA Plants Symbol:	EREA2
Synonyms/Other Names:

Ecology and Life History


Lifeform:	annual herb
Blooming Period: May-Sep	May-Sep
Elevation:	200-1000 (655-3280)
General Habitats:	Cismontane woodland, Valley and foothill grassland
Microhabitat:	Clay, Sandy, Shale, Talus
Microhabitat Details:	barren clay

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G2
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_SBBG
CRPR Changes:	changed from 4.3 to 1B.3 on 2006-03-03

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Monterey (MNT)
Quads: Name (Quad Code)
Curry Mountain (3612014), Parkfield (3512084), Smith Mountain (3612015)

Threat List Data from the CNDDB


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

Notes



Marginally distinct from E. temblorense and E. vestitum; only fully mature plants can be identified with certainty. Potentially threatened by road maintenance and grazing. See Leaflets of Western Botany 2: 133 (1938) for original description, and Phytologia 66(4): 374-375 (1989) and Flora North America 5: 417-418 (2005) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

CRPR List Change on 2006-03-03

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 November 2025].