(Fabaceae, Papilionoideae), a new species from Yunnan, China, based on morphological and molecular evidence.

, a new species from the dry-hot valley of the Jinsha River in the Yunnan province, China, is described and illustrated. It is morphologically similar to and in having glabrescent old branches, absent stipels, 3-foliolate leaves, and adaxially puberulent leaflets, while it differs from the latter two in having often paniculate inflorescences, obviously white standard, not incurved sickle keel, larger narrowly oblique legumes, and longer legume beak. The complete chloroplast genome of this new species is 149,073 bp in length and exhibits a typical quadripartite structure. Phylogenetic analyses based on the complete chloroplast genome also supported as a new species located at the basal distinct clade of the genus , clearly separated from the remaining members of the genus and its allied genera. A conservation assessment of data deficient (DD) is recommended for the new species without extensive exploring of similar habitats according to the IUCN Categories and Criteria.