N. Vietnam, Prov. Quang Binh, distr. Minh Hoa, 72 km to NWW from Dong Hoi, municipalite Thuong Hoa, Yen Son village, limestone massif Ke Bang (N 17°40' E 105°57'). Broadleaved evergreen primary dry closed forest on steep slopes and bluffs of limestone mesas and ridges at 400-450 m alt. Creeping epiphytic vine up to 4 m lg on shadow steep slopes. Rare.

No VH 4827 18.05.1997

International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)

Collectors: L. Averyanov, N.T. Hiep, P.K. Loc