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. Herb up to 0.5 m hg in open place. Flowers blue. Common. VH 3697 06.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)