FLORA OF VIETNAM. Elatostemma sp. N. Vietnam, Prov. Quang Binh, distr. Minh Hoa, 72 km to NWW. from Dong Hoi, municipalite Thong Hoa, vicinities of Yen Son village, limestone massif Ke Bang (N 17°40' E 105°57'). Primary evergreen broadleaved forest on steep slopes and bluffs of limestone mesas . at 200-250 m alt. Prostrate herb on shadow limestone bluffs. Not rare. No VH 4611  15.05.1997. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 5803-96). . Collectors: L. Averyanov, N.T. Hiep, P.K. Loc