Taxon Report

Eriogonum nudum Douglas ex Benth. var. psychicola Reveal

Antioch Dunes buckwheat

Print Report

Taxon Summary

Eriogonum nudum var. psychicola, commonly known as Antioch Dunes buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Inland dunes, growing at elevations from 0 to 20 meters. Eriogonum nudum var. psychicola is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Eriogonum nudum Douglas ex Benth. var. psychicola Reveal
Common Name:	Antioch Dunes buckwheat
Family:	Polygonaceae
Element Code:	PDPGN0849Q
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jul-Oct	Jul-Oct
Elevation:	0-20 (0-65)
General Habitats:	Inland dunes
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G5T1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 1B.1 on 2010-06-21

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: True
California Counties and Islands: Name (Code)
Contra Costa (CCA)
Quads: Name (Quad Code)
Antioch North (3812117)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	1	100 %
Development	1	100%
Mining	1	100%

Notes



Known from a single occurrence in the Antioch Dunes. Possibly threatened by non-native plants. See Phytologia 89:287 (2007) for original description.
Threats:

Taxonomy:

Selected References

CRPR List Addition on 2010-06-21

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 2 November 2025].