Taxon Details

Eriogonum apricum var. prostratum

Irish Hill buckwheat

View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist

Taxon Summary:

Eriogonum apricum var. prostratum, commonly known as Irish Hill buckwheat, is a perennial herb in the Polygonaceae that is found only in California. It occurs within Chaparral (openings, and Ione soil), growing at elevations from 90 to 120 meters. Eriogonum apricum var. prostratum is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Eriogonum apricum J.T. Howell var. prostratum Myatt
Common Name: Irish Hill buckwheat
Family:	Polygonaceae
Element Code:	PDPGN080F2
USDA Plants Symbol:	ERAPP
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	FE (1999-05-26)
State List:	CE (1987-01-01)
Global Rank:	G2T1
State Rank:	S1
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Jul

Elevation:
90 - 120 meters
295 - 395 feet

General Habitats:

Chaparral (openings, Ione soil)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from only two occurrences near Irish Hill and Carbondale Mesa on the Ione Formation. Threatened by vehicles, mining, and erosion. See Madroño 20(6):320 (1970) for original description, and Phytologia 66(4):320-321 (1989) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	5
	Total EOs	% of EOs
EOs with Threat Listed:	2	100 %
Mining	2	100%
ORV activity	1	50%
Road/trail construction/maint.	1	50%
Development	1	50%
Grazing	1	50%

Occurrence Data from the CNDDB

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

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	1

Presence:
Presumed Extant	2
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Amador (AMA)

Quads: Name (Quad Code)
Carbondale (3812141), Irish Hill (3812048)

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