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 about 500-560 m a.s.l.
Lowland closed secondary and primary old evergreen forest on steep slopes along rocky limestone ridge and on rocky tops composed with solid limestone.
Lithophyte and epiphyte on mossy trees along ridge tops. Very common.
HLF 6730 18 March 2007.
Coll. Averyanov L., P.K.Loc, N.V.Trai, N.T.Vinh, N.D.Phuong, Averyanova A. Grant from Henry Luce Foundation.