CNPS

CNPS Rare Plant Inventory

Species Details

Astragalus traskiae

Trask's milk-vetch

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  Classification

Scientific Name:
Astragalus traskiae Eastw.
Common Name:
Trask's milk-vetch
Family: Fabaceae
Element Code: PDFAB0F910
USDA Plants Symbol: ASTR4
Synonyms/Other Names:

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

  Occurrence Data from the CNDDB

Total Occurrences: 15
Element Occurrence Ranks:
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 21 November 2024].