Taxon Report

Astragalus didymocarpus H. & A. var. milesianus (Rydb.) Jeps.

Miles' milk-vetch

Print Report


Taxon Summary

Astragalus didymocarpus var. milesianus, commonly known as Miles' milk-vetch, is a annual herb in the Fabaceae that is found only in California. It occurs within Coastal scrub, growing at elevations from 20 to 90 meters. Astragalus didymocarpus var. milesianus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Astragalus didymocarpus H. & A. var. milesianus (Rydb.) Jeps.
Common Name:
 Miles' milk-vetch
Family: Fabaceae
Element Code: PDFAB0F2X3
USDA Plants Symbol: ASDIM
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Mar-Jun Mar-Jun
Elevation: 20-90 (65-295)
General Habitats: Coastal scrub
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G5T2
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 16
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 1
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 15

Location
California Endemic:  True
California Counties and Islands: Name (Code)
San Luis Obispo (SLO), Santa Barbara (SBA), Ventura (VEN)
Quads: Name (Quad Code)
Atascadero (3512046), Caldwell Mesa (3512023), Cayucos (3512048), Foxen Canyon (3412072), Gaviota (3412042), Hildreth Peak (3411955), Little Pine Mtn. (3411956), Lompoc (3412064), Matilija (3411943), Morro Bay North (3512047), Morro Bay South (3512037), Ojai (3411942), San Luis Obispo (3512036), Santa Margarita (3512045), Twitchell Dam (3412083), Ventura (3411933), Zaca Creek (3412062), Zaca Lake (3412071)

Threat List Data from the CNDDB

Threat List Total: 1
EOs with Threat Listed: Total EOs % of EOs
1 6 %
Development 1 6%

Notes
Threatened by development. See Bulletin of the Torrey Botanical Club 53(3):169 (1926) for original description, and Flora of California 2(1):376-377 (1936) by W.L. Jepson for revised nomenclature.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 9 May 2025].