Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Ban Vin vill., Xuan Lien Nature Reserve, shale mountains, around point 19°58′40″N 104°59′00″E, 980-1100 m.
Terrestrial. In primary closed evergreen seasonal tropical broad-leaved submontane forests on ridges and slopes of shale mountains.
Flowers ivory white.
HAL 11186 20 Aug. 2007 Coll.: P.K. Loc, N.S. Khang, N.T.Vinh & L.V. Hung
Grant from MOST, Council for Natural Science, Section of Life Sciences (6.077.06), Vietnam