SafePlants

Borrego Milkvetch (Astragalus lentiginosus var. borreganus)

The Borrego Milkvetch is a fascinating plant found in specific desert environments. Below is information compiled about this unique species and its characteristics.

Considerations for Pets

• Common names include "goat's-thorn" for A. gummifer, a related species.

Nomenclature and Taxonomy

• Scientific Name: Astragalus lentiginosus Douglas ex Hook. var. borreganus M.E. Jones
• Common Names: Borrego Milkvetch, Borrego Milk Vetch
• Family: Fabaceae (Pea Family)
• Synonyms: Astragalus lentiginosus Hook. var. borreganus M.E. Jones, Astragalus lentiginosus var. borreganus

Distribution and Habitat

• The Borrego Milkvetch is found in desert dunes, specifically in locations like the Anza-Borrego Desert State Park in Southern California.
• It has also been observed in the Borrego Badlands area and Borrego Valley.

Ecological Role

• The Borrego Milkvetch is listed by the California Native Plant Society as rare and endangered in California.
• It serves as a host plant for the adult blister beetle Meloe franciscanus.
• The emergence of a specific bee species is synchronized with the blooms of the Borrego Milkvetch, which is its sole host plant.

Interactions with Other Organisms

• Digger bees (Habropoda pallida) have been observed foraging on Borrego Milkvetch. Note that parasitic larvae may also be present.

Further Information

• Dave's Garden: A community where gardeners share tips and ideas, including information on seeds and plants.
• Wikimedia Commons: Hosts images of the Borrego Milkvetch.
• Anza-Borrego Desert Natural History Association: Offers information and updates on the flora of the region.