FLORA OF VIETNAM. Anoectochilus calcareus Aver. 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'). Broadleaved evergreen primary dry open forest on and near tops of limestone mesas . at 550-600 m alt. Terrestrial prostrate herb up to 10 cm hg in deep shadow limestone. hollows and largr crevices near tops of mesas. Leaves velvetly. greenish-gray with white venation. Rare. No VH 4764 17.05.1997. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 5803-96). . Collectors: L. Averyanov, N.T. Hiep, P.K. Loc