| H.G.A. Engler, Pflanzenr., vol. 228(I): [Heft 43], (Umbelliferae - Apioideae - Bupleurum, Trinia et reliquae Ammineae heteroclitae): p. 10, fig. 2 (1910) [58] | |
| Illustration contributed by: | University of Toronto Library, Canada |