Rhynchosia Lour., Legume photography, Psoralea, Legume researchers, Character statement list for the Leguminosae, Bean Bag webpage, BHL (Biodiversity Heritage Library), Leguminosae, Legume systematics, Diversity of Legumes from Gran Chaco, LPWG (Legume Phylogeny Working Group), Advances in Legume Systematics Part 13, Extinct Psoraleas, Fabaceae, and Legumes