Hoa Binh Prov., Tan Lac Distr., Ngo Luong Municipality, Bo village., coordinate ca. 20°29′18”N 105°15′43”E. In heavily logged evergreen broad-leaved woodland on ridges of limestone mts., at elevation about 800-850 m a.s.l. Lithophyte and epiphyte. Rather common. CPC 1960 31 March 2011 Coll.: N.Q.Hieu, L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, N.T.Vinh, T.B.Ngan, N.Tap, D.D.Dao, V.T.Ha.
Flowered under cultivation at September 2012. Sepals and petals lilac-violet, lip dirty yellowish. Photos. L.Averyanov.