Astragalus atwoodii Welsh and Thorne is named and described on the basis of materials collected on the Kaibab Plateau in Coconino County, Arizona.
Welsh, Stanley L. and Thorne, Kaye H.
"Plants of Arizona: a new species of Astragalus from the Kaibab Plateau,"
Great Basin Naturalist: Vol. 37
, Article 15.
Available at: http://scholarsarchive.byu.edu/gbn/vol37/iss1/15