SafePlants

Santa Barbara Milkvetch (Astragalus trichopodus)

Considerations for Pets

• This plant is also referred to as "locoweed," a general term sometimes associated with plants that can cause neurological issues in livestock. Further research is recommended.

Considerations for Children

• This plant is also referred to as "locoweed," a general term sometimes associated with plants that can cause neurological issues in livestock. Although not directly applicable to children, understanding the plant's traditional association is relevant.

Astragalus trichopodus is a species of legume known by the common name Santa Barbara milkvetch. It is also sometimes referred to as locoweed or ocean milkvetch.

Taxonomy and Nomenclature

• Scientific Name: Astragalus trichopodus (Nutt.) A. Gray
• Family: Fabaceae (Pea Family)
• Synonyms/Varieties:
  • 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 var. phoxus

Distribution and Habitat

• Astragalus trichopodus is native to southern California and Baja California.
• It is found in locations such as Santa Barbara County and Ventura County.

Ecological Role

• This species is sometimes considered an invasive species.

Morphological Characteristics

• It is described as a finely textured shrub.

Interactions with Other Organisms

• Astragalus trichopodus var. lonchus serves as a larval hostplant for the Palos Verdes Blue butterfly (Glaucopsyche lygdamus palosverdesensis).
• It attracts the Pale Swallowtail (Papilio eurymedon) butterfly.

Further Information

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