Taxon Details

Astragalus lentiginosus var. antonius

San Antonio milk-vetch

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Taxon Summary:

Astragalus lentiginosus var. antonius, commonly known as San Antonio milk-vetch, is a perennial herb in the Fabaceae that is found only in California. It occurs within Lower montane coniferous forest, and Upper montane coniferous forest, growing at elevations from 1500 to 2600 meters. Astragalus lentiginosus var. antonius is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Astragalus lentiginosus Hook. var. antonius Barneby
Common Name: San Antonio milk-vetch
Family:	Fabaceae
Element Code:	PDFAB0FB92
USDA Plants Symbol:	ASLEA3
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G5T2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; SB_USDA; USFS_S
CRPR Changes:
Add Date:	1994-01-01
Date Edited:	2021-05-26

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Apr-Jul

Elevation:
1500 - 2600 meters
4920 - 8530 feet

General Habitats:

Lower montane coniferous forest
Upper montane coniferous forest

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened by development, illegal dumping, non-native plants, and road maintenance. See Leaflets of Western Botany 4(5):100 (1945) for original description, and Memoirs of the New York Botanical Garden 13:926-927 (1964) 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:	6	50 %
Recreational use (non-ORV)	4	33%
Road/trail construction/maint.	4	33%
Non-native plant impacts	2	16%
Channelization	1	8%
Development	1	8%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					12
A	B	C	D	X	U
0	1	1	0	0	10

Occurrence Status:
Historical >20 Years	8
Recent <=20 Years	4

Presence:
Presumed Extant	12
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Los Angeles (LAX), San Bernardino (SBD)

Quads: Name (Quad Code)
Mescal Creek (3411746), Mount San Antonio (3411736), Telegraph Peak (3411735), Valyermo (3411747)

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