Quang Binh Prov., Minh Hoa Distr., Dan Hoa Municipality, Bai Dinh village around point 17°44′04”N 105°49′14”E.
Remnants of primary evergreen broad-leaved forest on very steep slopes and on tops of remnant hills composed with highly eroded marble-like solid limestone at elevation about 400-500 m a.s.l.
Treelet 3-4 m tall on open rocks. Flowers white to light yellowish. Occasional.
HAL 12444 8 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.