RT Journal Article T1 Heterostemma cucphuongense (Apocynaceae, Asclepiadoideae), a new species from Vietnam JF PhytoKeys JO PK FD Pensoft Publishers DO 10.3897/phytokeys.148.50029 VO 148 A1 Tran, The Bach A1 Han, Le Ngoc A1 Van Hai, Do A1 Quang, Bui Hong A1 Huong, Nguyen Thi Thanh A1 Ha, Bui Thu A1 Hai, Tran Van A1 Rodda, Michele YR 2020 UL https://doi.org/10.3897/phytokeys.148.50029 AB Heterostemma cucphuongense (Apocynaceae, Asclepiadoideae), a new species from Vietnam is described, illustrated and compared with the similar species Heterostemma succosum Kerr. Heterostemma cucphuongense differs from H. succosum by the morphology of the rachis of the inflorescence, the margins of the corolla lobes and the colour of the adaxial surface of the corolla.