Literature references
1 literature reference for Astragalus nigrescens Nutt.:
| Author: | Nutt. |
|---|---|
| Year: | 1848 |
| Title: | – |
| Source: | In: Proc. Acad. Nat. Sci. Philad. 4: 9 (1848); et in Journ. Acad.Nat. Sci. Philad., Ser. 2, 1: 153 |
1 literature reference for Astragalus nigrescens Nutt.:
| Author: | Nutt. |
|---|---|
| Year: | 1848 |
| Title: | – |
| Source: | In: Proc. Acad. Nat. Sci. Philad. 4: 9 (1848); et in Journ. Acad.Nat. Sci. Philad., Ser. 2, 1: 153 |