Vicia unijuga, commonly called two‑leaf vetch, is a plant in the family Fabaceae, native to Siberia, Mongolia, China, Korea, and Japan, where it is widespread. The genus name Vicia originates from the Latin term for vetch; the specific epithet unijuga combines the Latin uni‑ (“one”) and jugum (“pair”), referring to the plant’s single‑paired leaflets. The species exhibits considerable morphological variation, and several forms and varieties have been described.
