S.Vietnam, Thua Thien Hue Prov., Phu Loc Distr., Bach Ma National Park, N slope of Bach Ma mt below Hai Vong Dai peak, around point 16°12′N 107°52′E at elev. 1100-900 m a.s.l.
Broad-leaved evergreen dry secondary mt forest on very steep shale/sandstone slopes. Terrestrial herb up to 1 m tall on shady steep slope. Flowers: tepals white with pink tint, Lip yellow with red center and red nerves, anthers yellow. Common.
HLF 1280 22 April 2003. (Photo).
Coll. V.X.Phuong, L.Averyanov, N.X.Tam, N.T.Vinh. Grant from Henry Luce Foundation.