Thanh Hoa Prov., Quan Son Distr., Son Dien Municipality, around point 20°16′57″N 104°48′32″E, 450-600 m, shale mountains, in logged evergreen broad-leaved lowland forests on slopes.
Occasionally common.
HAL 11211a 26 Aug. 2007 Coll.: P.K. Loc, N.S. Khang & N.T.Vinh
Grant from MOST, Council for Natural Science, Section of Life Sciences (6.077.06), Vietnam