Taxon Details

Eriogonum twisselmannii

Twisselmann's buckwheat

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Taxon Summary:

Eriogonum twisselmannii, commonly known as Twisselmann's buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Upper montane coniferous forest, growing at elevations from 2375 to 2805 meters. Eriogonum twisselmannii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Eriogonum twisselmannii (J.T. Howell) Rev.
Common Name: Twisselmann's buckwheat
Family:	Polygonaceae
Element Code:	PDPGN08610
USDA Plants Symbol:	ERTW2
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	CR (1982-07-01)
Global Rank:	G2
State Rank:	S2
Other Status:	USFS_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Sep

Elevation:
2375 - 2805 meters
7790 - 9205 feet

General Habitats:

Upper montane coniferous forest (granitic)

Microhabitat Details:

Microhabitat:

Notes

Notes: See Leaflets of Western Botany 10(1):13 (1963) for original description, and Phytologia 66(4):352 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	4	31 %
Logging	2	15%
Other	1	7%
Foot traffic/trampling	1	7%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					13
A	B	C	D	X	U
9	3	0	0	0	1

Occurrence Status:
Historical >20 Years	10
Recent <=20 Years	3

Presence:
Presumed Extant	13
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Tulare (TUL)

Quads: Name (Quad Code)
Camp Nelson (3611825), Sentinel Peak (3611815)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Rare Plant Inventory