Vietnam, Nghe An Prov., Tuong Duong Distr., Tam Quang Municipality, Tung Huong village, along Khe Mat stream around point 19°03′15″N 104°36′19″ at elevation 550-700 m a.s.l.
Lowland closed secondary and primary old evergreen forest on steep slopes along rocky ridge composed with stratified solid limestone.
Terrestrial and lithophytic herb on steep slope. Leaves uniform green. Not common.
HLF 6774 19 March 2007.
Coll. Averyanov L., P.K.Loc, N.V.Trai, N.T.Vinh, N.D.Phuong, Averyanova A. Grant from Henry Luce Foundation.