S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 32 km to NNE from Dalat city (N 12° 08′, E 108° 39′). Old secondary dry evergreen broadleaved mt forest rich in primary elements at 1500-1550 m alt. in 8-10 km from Bi Dup main peak to the W. Woody vine up to 8-10 m lg in open place.Flowers yellow, inflorescence leaves white. Common. VH 3689 06.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)