Phu Tho Prov., Tan Son Distr., Xuan Son Municipality, Du village, Nhon Mountain, around mountain top, point 21°06′51”N 104°57′34”E.
Open secondary shrubs and short tall grasslands on flat alluvial clay valley between limestone remnant hills in agricultural area near village at elevation about 400 m a.s.l.
Treelet to 4 m tall. Flowers white. Common.
HAL 12843 19 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.