FLORA OF VIETNAM. Elatostema 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'). Remnant open evergreen primary broadleaved forest along river in alluvial valley bottom between limestone ridges and mesas at 200 m. alt. Terrestrial and epilitic herb up to 0.5 m hg in wet shadow stream slope. Common. No VH 4793  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