N. Vietnam, prov. Ha Giang, distr. Dong Van, municipality Dong Van, vicinities of Dong Van town (N 23°16′ E 105°22′). Secondary shrubs on steep slopes and bluffs of karst remnant limestone ridges at 1100 m elev. Climbing shrub with shoots up to 3 m lg. Flowers white with yellow center. Common.
CBL 1705 27 April 1999
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98)