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Santa Barbara milkvetch

Scientific Name: Astragalus trichopodus

Family: Fabaceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Perennial

Other Names:

       

Santa Barbara Milkvetch (Astragalus trichopodus)

The Santa Barbara milkvetch is a fascinating plant native to southern California and Baja California.

Considerations for Pets

  • This plant is also known as locoweed.

Considerations for Children

  • This plant is also known as locoweed.

Common Names

  • Santa Barbara milk vetch
  • Santa Barbara milkvetch
  • Locoweed
  • Antiselli's milkvetch

Taxonomy and Nomenclature

  • Scientific Name: Astragalus trichopodus (Nutt.) A. Gray
  • Family: Fabaceae (Pea Family)
  • Genus: Astragalus (Milkvetch)
  • Synonyms/Variations:
    • Astragalus trichopodus var. lonchus (M.E. Jones) Barneby
    • Astragalus trichopodus var. trichopodus
    • Astragalus trichopodus var. antisellii (A. Gray ex W.H. Brewer & S. Watson) Jeps.
    • Astragalus trichopodus phoxus

Distribution and Habitat

  • Native to southern California and Baja California.
  • Found in locations such as Torrey Pines State Park, CA, and Ventura and Santa Barbara counties.

Ecological Role

  • In some areas, this species is considered invasive.
  • It serves as a larval host plant for the Palos Verdes Blue butterfly, particularly the variety Astragalus trichopodus var. lonchus.

Morphological Characteristics and Growth Habits

  • Described as a finely textured shrub.
  • It's a native perennial herb.
  • Herbaceous forb.

Fertilization

  • Fertilization is recommended when planting, or every 2-3 years, towards the end of winter or beginning of Autumn.

Further Information

  • CalPhotos
  • Dave's Garden
  • Idaho Fish and Wildlife Information System
  • Discover Life
  • University of California Santa Barbara
  • UC Natural Reserve System