| H.G.A. Engler, Pflanzenr., vol. 129 [Heft 53], (Geraniaceae): p. 9, fig. 5 (1912) [147] | |
| Illustration contributed by: | University of Toronto Library, Canada |
H.G.A. Engler, Pflanzenr., vol. 129 [Heft 53], (Geraniaceae): p. 9, fig. 5 (1912)