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

Summary 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.