Vietnam, Nghe An Prov., Tuong Duong Distr., Tam Quang Municipality, near Tung Huong village, around point 19°05′23″N 104°39′59″E at elevation about 124 m a.s.l.
Lowland open secondary evergreen forest on steep slopes along rocky stream valley composed with stratified solid shale and solid sandstone.
Terrestrial prostrate herb on wet open places along stream. Common.
HLF 6559 14 March 2007.
Coll. Averyanov L., P.K.Loc, N.V.Trai, N.T.Vinh, N.D.Phuong, Averyanova A. Grant from Henry Luce Foundation.