Rubiaceae Juss. Ophiorrhiza subrubescens Drake S. Vietnam, Prov. Khanh Hoa. Open dry evegreen forest on cliffs at 600-700 m alt. on NE slope of Bi Dup mountain system, near 5-6 km to W of Khanh Le village on Lieng Ly river (near 15 km to W of Cau Ba village). Herb shrub up to 0.5 m high in wey shadow place. Flowers white. VH 1442 23.04.1995 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, N. Q. Binh, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, N.X. Tam, G. Yakovlev