Causonis is a genus of flowering plants belonging to the family Vitaceae; it is now placed in the tribe Cayratieae.
Its native range is Tropical and Subtropical Asia to Southwestern Pacific.
Species Plants of the World Online currently includes: Causonis clematidea (F.Muell.) Jackes Causonis corniculata (Benth.) J.Wen & L.M.Lu Causonis eurynema (B.L.Burtt) Jackes Causonis japonica (Thunb.) Raf. - type species Causonis maritima (Jackes) Jackes Causonis pterita (Merr.) J.Wen & L.M.Lu Causonis trifolia (L.) Mabb. & J.Wen
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