S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, 29 km to NEE from Dalat city. Old open secondary grassy coniferous mt forest with domination of Pinus kesiya on river valley slopes on W macroslope of Bi Dup mt system at 1450-1500 m alt. (N 12° 08′, E 108° 39′). Herb vine up to 3-4 m lg. Flowers light blue-violet. Common. VH 4026 16.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)