Tuyen Quang Prov., Na Hang Distr., Sinh Long Municipality, central of Nam Duong Vill., around point 22 35′07″ N, 105 22′14″ E, 344 m In completely logged closed primary evergreen broad-leaved lowland forests on stream banks of limestone areas Lithophyte
CPC 1328 13 Mar 2011 Coll.: N.Q.Hieu, N.T.Hiep, P.K.Loc, N.T.Vinh