Taxon Details

Eriogonum butterworthianum

Butterworth's buckwheat

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Taxon Summary:

Eriogonum butterworthianum, commonly known as Butterworth's buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Chaparral (sandstone), and Valley and foothill grassland, growing at elevations from 585 to 740 meters. Eriogonum butterworthianum is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Eriogonum butterworthianum J.T. Howell
Common Name: Butterworth's buckwheat
Family:	Polygonaceae
Element Code:	PDPGN080X0
USDA Plants Symbol:	ERBU2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	CR (1979-11-01)
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Jul

Elevation:
585 - 740 meters
1920 - 2430 feet

General Habitats:

Chaparral (sandstone)
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Sandy

Notes

Notes: Known from only four occurrences near Arroyo Seco in the Santa Lucia Mtns. See Leaflets of Western Botany 9(9-10):153-154 (1961) for original description, and Phytologia 66(4):328 (1989) for taxonomic treatment. Potentially threatened by foot traffic.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	1	25 %
Foot traffic/trampling	1	25%
Other	1	25%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					4
A	B	C	D	X	U
2	0	0	0	0	2

Occurrence Status:
Historical >20 Years	2
Recent <=20 Years	2

Presence:
Presumed Extant	4
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Monterey (MNT)

Quads: Name (Quad Code)
Cone Peak (3612114), Junipero Serra Peak (3612124), Reliz Canyon (3612123)

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