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Aztec milkvetch

Astragalus proximus

Aztec milkvetch
Photo: Robb Hannawacker https://www.inaturalist.org/people/hannawacker, CC0

Aztec milkvetch is a small perennial legume from the dry grasslands and foothills of southern Colorado and northern New Mexico, grown for its grayish foliage and white or lavender flowers. It is a native wildflower that needs sun, sharp drainage and little water once established.

Family
Fabaceae (Pea & bean family)
Grows as
Perennial
Light
Full sun
Water
Water sparingly, letting the soil dry out fully between waterings.
Soil
Well-drained, sandy or gravelly soil; avoid heavy clay.
Temperature
Hardy in cold winters typical of its native range; protect pots from prolonged freezing.
How easy
Moderate
Native range
SW. Colorado to NW. New Mexico
Climate
temperate

About

Astragalus proximus is a species of flowering plant in the legume family known by the common name Aztec milkvetch. It is native to southern Colorado and northern New Mexico in the United States.

This perennial herb produces a cluster of stems from an underground caudex. The stems are up to 50 centimeters long. The herbage is grayish green due to flat hairs. The leaves are up to 8 centimeters long and are compound, made up of up to 11 leaflets. There are stipules at the bases of the leaf stalks. Flowering occurs in April through July. The inflorescence is a raceme of up to 40 flowers. The flowers are white or lavender-tinted and measure about 6 or 7 millimeters in length. The fruit is a hanging legume pod with one chamber containing small seeds. This species can be distinguished from the similar Astragalus flexuosus by its hairless pods and usually fewer leaflets on each leaf.

Other Astragalus plants

Astragalus aboriginum · Rogue River milkvetch · Sharp-leaved Milk Vetch · Sharpkeel milkvetch · Humboldt County milkvetch · Purple milkvetch · Cushenbury milkvetch · Astragalus alopecurus · Alpine milkvetch · Crescent milkvetch · Hermit Milkvetch · Anderson's milkvetch

Text excerpted from the Wikipedia article Astragalus proximus by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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