S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, N slope of Bach Ma mt system, to the N of point 16°12′11′'N 107°50′23′'E at elev. about 400 m a.s.l.
Broad-leaved evergreen primary closed wet mt forest along deep rocky stream canyon. Terrestrial herb up to 1 m tall. Flowers white, median tepal with yellow spot. Occasional.
HLF 1459 29 April 2003.
Coll. N.T.Hiep, L.Averyanov, N.T.Vinh et al. Grant from Henry Luce Foundation.