Astragalus flavus Nutt.  

Family: Fabaceae

Yellow Milk-Vetch, more...yellow milkvetch

[Astragalus confertiflorus A. Gray, moreAstragalus confertiflorus var. confertiflorus , Astragalus confertiflorus var. flaviflorus (Kuntze) M.E. Jones, Astragalus flavus var. argillosus (M.E. Jones) Barneby, Astragalus flavus var. candicans A. Gray]