Is this a form of Medicago sativa or some relative of alfalfa? This was photographed in July in Custer National Forest in southern Montana. Thank you.
There are over 5 dozen species of Astragalus in Montana. They are most readily-identified by seed-pod.
You need to pull apart a flower to distinguish Astragalus from Oxytropis to see if the keel is pointed or rounded. I'd lean towards Oxytropis on this one... And it's absolutely not alfalfa.
