Taxon Details

Eriogonum giganteum var. formosum

San Clemente Island buckwheat

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Taxon Summary:

Eriogonum giganteum var. formosum, commonly known as San Clemente Island buckwheat, is a perennial deciduous shrub in the Polygonaceae that is found only in California. It occurs within Coastal bluff scrub, growing at elevations from 10 to 455 meters. Eriogonum giganteum var. formosum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Eriogonum giganteum Wats. var. formosum K. Bdg.
Common Name: San Clemente Island buckwheat
Family:	Polygonaceae
Element Code:	PDPGN082A2
USDA Plants Symbol:	ERGIF
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G3T3?
State Rank:	S3?
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: Mar-Oct

Elevation:
10 - 455 meters
35 - 1495 feet

General Habitats:

Coastal bluff scrub (rocky)

Microhabitat Details:

Microhabitat:

Notes

Notes: Possibly threatened by Navy activities. Feral herbivores removed from SCM Isl., and vegetation recovering. See Phytologia 66(4):318-319 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	3 %
Development	1	2%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					39
A	B	C	D	X	U
0	0	0	0	0	39

Occurrence Status:
Historical >20 Years	13
Recent <=20 Years	26

Presence:
Presumed Extant	39
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX)

Quads: Name (Quad Code)
San Clemente Island Central (3211874), San Clemente Island North (3211885), San Clemente Island South (3211873)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory