Diphyllarium
Diphyllarium is a genus of flowering plants in the legume family, Fabaceae. It contains a single species, Diphyllarium mekongense, a shrub native to Vietnam, Laos, and Thailand. It belongs to subfamily Faboideae.

References 

Phaseoleae
Monotypic Fabaceae genera
Flora of Laos
Flora of Thailand
Flora of Vietnam
Plants described in 1915
Taxa named by François Gagnepain