Vietnam, Nghe An Prov., Tuong Duong Distr., Tam Quang Municipality, Tung Huong village, along Khe Mat stream around point 19°03′26″N 104°37′22″E at elevation about 200 m a.s.l.
Lowland closed secondary evergreen forest on steep slopes along rocky stream valley composed with stratified solid shale and sandstone.
Shrub 2-3 m tall in rather open place along steep rocky shady stream slopes. Flower buds dull yellow. Occasional.
HLF 6577 15 March 2007.
Coll. Averyanov L., P.K.Loc, N.V.Trai, N.T.Vinh, N.D.Phuong, Averyanova A. Grant from Henry Luce Foundation.