S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, in 29-31 km to NNE from Dalat city. Old open secondary dry coniferous mt forest with domination of Pinus kesiya at 1550-1700 m alt. in 8-10 km from Bi Dup main peak to the W (N 12° 07′, E 108° 36′). Herb up to 1.2 m hg in open sandy place. Flowers light blue. Not common. VH 3951 14.04.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)