Vicia unijuga, commonly called two-leaf vetch, is a species of flowering plant in the family Fabaceae, native to Siberia, Mongolia, China, Korea, and Japan, where it is widespread. It is a perennial that produces purple flowers in the summer and fall. This species contains a considerable amount of morphological variation, with some forms and varieties being named. Vicia unijuga historically included the similar-looking Vicia ohwiana, which has now been given the rank of species.
