Astragalus lentiformis is a species of milkvetch known by the common name lens-pod milkvetch. It is endemic to the Sierra Nevada in eastern Plumas County, California, where it grows in chaparral scrub and coniferous forests.
Astragalus lentiformis is a small perennial herb forming a patch of spreading stems 10 to 20 centimeters long. The leaves are less than 4 centimeters in length and are made up of several narrow leaflets. Stem and leaves have a thin coat of fine grayish hairs.
The inflorescence is a small cluster of 5 to 10 off-white or pale yellow flowers each a few millimeters long. The fruit is a lens-shaped legume pod less than a centimeter long which is hairy and papery in texture.