Taxon Details

Eriogonum umbellatum var. lautum

Scott Valley buckwheat

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Photo of Eriogonum umbellatum var. lautum

Taxon Summary:

Eriogonum umbellatum var. lautum, commonly known as Scott Valley buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 800 to 900 meters. Eriogonum umbellatum var. lautum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Eriogonum umbellatum Torrey var. lautum Reveal
Common Name: Scott Valley buckwheat
Family:	Polygonaceae
Element Code:	PDPGN086UX
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G5T1
State Rank:	S1
Other Status:	SB_UCSC
CRPR Changes: added to 1B.1 on 2007-06-25
Add Date:	2007-06-25
Date Edited:	2025-05-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Sep

Elevation:
800 - 900 meters
2625 - 2955 feet

General Habitats:

Cismontane woodland
Lower montane coniferous forest

Microhabitat Details:

Microhabitat:

Flats
Gravelly
Sandy

Notes

Notes: Known only from Scott Valley.
Threats: Severely threatened by housing development. Potentially threatened by horticultural collecting.
Taxonomy: See Phytologia 86: 148 (2004) for original description.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	1
	Total EOs	% of EOs
EOs with Threat Listed:	1	50 %
Development	1	50%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					2
A	B	C	D	X	U
0	0	0	0	1	1

Occurrence Status:
Historical >20 Years	2
Recent <=20 Years	0

Presence:
Presumed Extant	1
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Siskiyou (SIS)

Quads: Name (Quad Code)
Etna (4112248), Greenview (4112258), McConaughy Gulch (4112247)*

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