| G.F. Hoffmann, Deutschl. Fl. (Hoffmann), vol. 2 (Cryptogamie): t. 8, fig. 2 (1796) [27] | |
| Illustration contributed by: | Wellcome Museum and Library, London, U.K. |
G.F. Hoffmann, Deutschl. Fl. (Hoffmann), vol. 2 (Cryptogamie): t. 8, fig. 2 (1796)