Taxon Details

Eriogonum umbellatum var. ahartii

Ahart's buckwheat

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Taxon Summary:

Eriogonum umbellatum var. ahartii, commonly known as Ahart's buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 400 to 2000 meters. Eriogonum umbellatum var. ahartii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Eriogonum umbellatum Torr. var. ahartii Reveal
Common Name: Ahart's buckwheat
Family:	Polygonaceae
Element Code:	PDPGN086UY
USDA Plants Symbol:
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:	G5T3
State Rank:	S3
Other Status:	BLM_S; SB_UCSC; USFS_S
CRPR Changes: added to 1B.2 on 2010-11-29 added to 4.2? on 2007-09-17
Add Date:	2010-11-29
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Sep

Elevation:
400 - 2000 meters
1310 - 6560 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Openings
Serpentine
Slopes

Notes

Notes: Threatened by road and trail construction and maintenance, vehicles, and fire suppression. Potentially threatened by logging. Not in The Jepson Manual (1993). See Phytologia 86:146 (2004) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	9
	Total EOs	% of EOs
EOs with Threat Listed:	15	47 %
Road/trail construction/maint.	8	25%
Logging	6	18%
ORV activity	4	12%
Other	4	12%
Wood cutting or brush clearing	4	12%
Erosion/runoff	2	6%
Recreational use (non-ORV)	2	6%
Mining	2	6%
Non-native plant impacts	2	6%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					32
A	B	C	D	X	U
1	13	3	0	0	15

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	29

Presence:
Presumed Extant	32
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Butte (BUT), Plumas (PLU), Sierra (SIE), Yuba (YUB)

Quads: Name (Quad Code)
Berry Creek (3912164), Cascade (3912162), Challenge (3912142), Cherokee (3912165), Clipper Mills (3912152), Cohasset (3912186), Goodyears Bar (3912058), Meadow Valley (3912181), Paradise East (3912175), Paradise West (3912176), Pulga (3912174), Stirling City (3912185)

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 Status Review:	CRPR List Addition on 2007-09-17
CNPS Status Review:	CRPR List Addition on 2010-11-29

CNPS Rare Plant Inventory