Tylophora tengii Tsiang (Asclepiadaceae R. Br.) is an additional species for the flora of Vietnam. Tylophora tengii Tsiang distinguishes with other species of Asclepiadaceae by: colour of flower, hairs on corolla throat, inflorescens shorter than leaves, lateral vein clearly, shape of leave, length of peduncle and pedicel, habitus. This species was found in the Quangtri province (Trieuphong, Trieuthuong).
Tran The Bach