Laxmann's milkvetch, Astragalus laxmannii

Laxmann's milkvetch is part of a very large genus. I started to count the species on the USDA plants site but gave it up at 46 species that start with a. It's the largest genus, with about 4200 species worldwide. Not too many here in the northeast, but as one gets farther away, they quickly multiply. An almost constant delight on the wildflower search, and some real good puzzles for identification. Laxmann's grows in AK, CO, IA, ID, KS, MN, MT, ND, NE, NM, OR, SD, UT, WA, WY, AB, BC, MB, NT, ON, SK, and YT. Lake co CO, 6/20/13.