Flower Color: Arizona Milkvetch has multiple colored flowers of white, pink, yellow, purple, lavender or blue in showy clusters; fruits are linearpods also finely whitish.
Flowering Season: March to May or June.
Elevation: 2,800 to 4,500 feet (853 - 1,372 m).
Habitat Preferences: Arizona Milkvetch is found on plains, washes, canyon bottoms, hillsides, flats, mesas, roadsides, rocky slopes; also found in calcareous areas and alluvial fans; also found in desert grasslands, desert shrublands and Juniper communities.
Recorded Range: Rare in the United States, Arizona Milkvetch is found mostly throughout the mid-section in Arizona with possible records in New Mexico. It is also native to Sonora, Mexico.
In the Southwestern United States: Arizona has 160 species of genus, California has 180 species, Nevada has 189 species, New Mexico has 139 species, Texas has 60 species, Utah has 205 species. Data approximate, subject to revision.
Genus Information: Several hundred species in Astragalus throughout North America; 80 or more species in Arizona.
Comments: There is very little recorded or published information for the Arizona Milkvetch. The type specimen for Astragalus arizonicus was collected from near Camp Grant, Graham County, Arizona (Palmer).
Arizona Milkweed, Astragalus arizonicus has attractive flowers, the flowers and their seeds may be visited by hummingbirds and/or small mammals including rodents and granivorous birds in search of nectar or food.
Arizona Milkweed, Astragalus arizonicus has attractive flowers, the flowers and their plants may be visited by butterflies, moths, flies, honeybees, Native Bees and other insects in search of food and nectar.
The genus “Astragalus” (Astrag'alus:) is from the Greek word "astragalos" meaning "ankle bone"; the reference is from the shape of the seeds.