Taxon Details

Astragalus traskiae

Trask's milk-vetch

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Taxon Summary:

Astragalus traskiae, commonly known as Trask's milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Coastal bluff scrub, Coastal dunes, and Coastal scrub, growing at elevations from 5 to 245 meters. Astragalus traskiae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Astragalus traskiae Eastw.
Common Name: Trask's milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0F910
USDA Plants Symbol:	ASTR4
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	CR (1979-11-01)
Global Rank:	G3
State Rank:	S3
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Feb-Jul

Elevation:
5 - 245 meters
15 - 805 feet

General Habitats:

Coastal bluff scrub
Coastal dunes
Coastal scrub

Microhabitat Details:

Microhabitat:

Notes

Notes: Populations on SBR Isl. declined severely in the late 1980's. Possibly threatened by Navy activities on SNI Isl. See Proceedings of the California Academy of Sciences III 1:102 (1898) for original description, and Memoirs of the New York Botanical Garden 13:461-463 (1964) for taxonomic treatment.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	2
	Total EOs	% of EOs
EOs with Threat Listed:	2	13 %
Non-native plant impacts	2	13%
Erosion/runoff	1	6%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					15
A	B	C	D	X	U
0	13	0	0	0	2

Occurrence Status:
Historical >20 Years	13
Recent <=20 Years	2

Presence:
Presumed Extant	15
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Santa Barbara (SBA), Ventura (VEN)

Quads: Name (Quad Code)
San Nicolas Island (3311924), Santa Barbara Island (3311848)

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