S. Vietnam, Prov. Kon Tum, Distr. Dak Gley, about 15-18 km to NW of Dak Gley town, between Mang Khen (Dak Che) and Dak Polo villages, near Laos boundary. Primary evergreen mountain forest at 1250-1450 m alt.
Small herb in wet places along streams, often just in the water. Flowers blue. Very common.
VH 1906 22.11.1995
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5094-93)
Participants: L. Averyanov, N.T. Ban, A. Budantzev, L. Budantzev, N.T. Hiep, D.D. Huyen, P.K. Loc, G. Yakovlev