S. Vietnam, Prov. Lam Dong, distr. Lac Duong, municipalite Da Chay, vicinities Klong Lanh village, 31 km to NE from Dalat city. Old open evergreen broadleaved secondary forest rich in primary elements along mt river on NW macroslope of Bi Dup mt system at 1450 m alt. (N 12° 08′, E 108° 39′). Prostrate herb up to 0.4 m hg in open sandy place along river. Flowers blue-violet. Common. VH 3873 12.04.1997
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)