Rubiaceae sp. S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay and Prov. Khanh Hoa, distr. Khanh Son boundary region, 41 km to NE from Dalat city. Primary closed broadleaved cloud forest along Hon Giao mt. ridge at 1800-2000 m alt. (N 12° 11′, E 108° 43′). Treelet or tree up to 10 m hg. Not common. VH 4142 21.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)