S. Vietnam, Prov. Lam Dong, 31 km to NE from Dalat city, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village (N 12° 08′, E 108° 39′). Old open secondary coniferous forest with domination of Pinus kesiya on NW macroslope of Bi Dup mt system at 1500-1550 m alt. Herb vine up to 8 m lg. Flowers white to light blue. Not rare. VH 2794 17.03.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)
Collectors: L. Averyanov, N.Q. Binh, N.V. Duy, P.K. Loc