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 si