For Astragalus
Barneby, R.C. 1964. Atlas of North American Astragalus. Mem. New York Bot. Garden 13: 1-1188.
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young Univ., Provo, UT.
Welsh, S.L. 2023b. Astragalus. Pp. 584-900. In Flora of North America Editorial Committee. 2023b. Flora of North America north of Mexico. Volume 11.2, Magnoliophyta: Fabaceae, part 2. Oxford Univ. Press, New York, NY. 543-1108 pp.
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