Dolichos kasetsartianus (Fabaceae: Papilionoideae), a new species from Thailand, and clarification of the identity compared with D. junghuhnianus and Wajira grahamiana

A new species, Dolichos kasetsartianus, is described from Thailand; we include a line drawing, photographs, distribution, specimens examined, phenology, etymology, vernacular name, a summary of the ecology and IUCN conservation status, and taxonomic comments. The morphological differences and some nomenclatural problems between D. kasetsartianus and the allied species, D. junghuhnianus and D. grahamianus, currently accepted as Wajira grahamiana, are clarified. A table is provided to compare the new species with the two allied species on the basis of vegetative and reproductive characters, ecology and distribution.