Astragalus canadensis var. brevidens (Gandog.) Barneby

this closeup of hairs on a leaf should be demonstrating the forked strigose hairs which is a key character. These are missing so the character may not be a good one or else this specimen in misidentified. See other example of leaf detail from another specimen.

This is a better closeup of strigose forked hairs. Actually they are more like tee shaped hairs with the central attachment axis very hard to see.