Literature Based Distribution
Region
Country
Mapping will be based on a standard reference mark based on political units when available.
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| United States | | | Turner, B. L. | 1959 | The Legumes of Texas Univ. of Texas Press, Austin | | 284 pp |
| United States | | | Williams, M. C. & R. C. Barneby | 1977 | The Occurrence of Nitro-toxins in North America Astragalus (Fabaceae) | Brittonia | 29(3): 310–326 |
| United States | | | Barneby, R. C. | 1964 | Atlas of North American Astragalus | Mem. New York Bot. Gard. | 13(1–2): 1–1188 |
| United States | | | Anonymous | 1986 | (none) | List-Based Rec., Soil Conserv. Serv., U.S.D.A. | |
| United States | | | Correll, D. S. & M. C. Johnston | 1970 | (none) | Man. Vasc. Pl. Texas | i–xv, 1–1881 |
| United States | Texas | | Barneby, R. C. | 1964 | Atlas of North American Astragalus | Mem. New York Bot. Gard. | 13(1–2): 1–1188 |
| United States | Texas | | Correll, D. S. & M. C. Johnston | 1970 | (none) | Man. Vasc. Pl. Texas | i–xv, 1–1881 |
| United States | Texas | | Turner, B. L. | 1959 | The Legumes of Texas Univ. of Texas Press, Austin | | 284 pp |
| United States | Texas | | Williams, M. C. & R. C. Barneby | 1977 | The Occurrence of Nitro-toxins in North America Astragalus (Fabaceae) | Brittonia | 29(3): 310–326 |
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