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 closed primary forest on steep slopes and bluffs of limestone mesas at 450-550 m alt. Prostrate terrestrial herb on rocky steep slopes. Flowers pink. Leaves dark green with pink central vein. Not common. VH 4772 17.05.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)