Literature references
2 literature references:
| Author: | McGregor,R.L. |
|---|---|
| Year: | 1986 |
| Title: | – |
| Source: | Mim.Fab.Caesal. In:Flora of the Great Plains.pp407-490 |
| Author: | Ross-Craig,S. |
|---|---|
| Year: | 1954 |
| Title: | – |
| Source: | Drawings of British Plants Part VII.Reprinted 1979,Vol 3. |