Taxon Report

Eriogonum grande Greene var. grande

island buckwheat

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Taxon Summary

Eriogonum grande var. grande, commonly known as island buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Coastal bluff scrub, Coastal scrub, and Valley and foothill grassland, growing at elevations from 3 to 460 meters. Eriogonum grande var. grande is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

Classification


Scientific Name:	Eriogonum grande Greene var. grande
Common Name:	island buckwheat
Family:	Polygonaceae
Element Code:	PDPGN082J1
USDA Plants Symbol:	ERGRG5
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Oct	Jun-Oct
Elevation:	3-460 (10-1510)
General Habitats:	Coastal bluff scrub, Coastal scrub, Valley and foothill grassland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.2
Global Rank:	G4T4
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: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), Santa Barbara (SBA), Ventura (VEN)
Quads: Name (Quad Code)
Anacapa Island (3311983), San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873), San Miguel Island East (3312083), San Miguel Island West (3312084), Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina West (3311845), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Cruz Island D (3311984), Santa Rosa Island East (3311988), Santa Rosa Island North (3312081)

Threat List Data from the CNDDB


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

Notes



Potentially threatened by development. See Phytologia 66(4):333-334 (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 5 February 2025].