Astragalus gambelianus is an annual herb with slender stems reaching a maximum of 30 centimeters long, but generally remaining shorter. A dwarf milkvetch, it is smaller than most other species of its genus. The leaves are less than 4 centimeters long and are made up of several oblong leaflets, each a few millimeters in length. The
inflorescence holds up to 15 purple-tinted white flowers, each generally less than 6 millimeters long. The herbage of the inflorescence is coated in black hairs. The fruit is a tiny rounded or oval
legume pod just a few millimeters long. ==References==