Tuyen Quang Prov., Na Hang Distr., Sinh Long Municipality, Nam Duong Vill., Xo Lo Tre Valley, around point 22°35′40″ N, 105°21′05″ E, 495 m In logged closed primary evergreen broad-leaved lowland forests on slopes of sand- and shalestone mts. Small shrub, ca. 2 m tall
CPC 1291 10 Mar 2011 Coll.: N.Q.Hieu, N.T.Hiep, P.K.Loc, N.T.Vinh