Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Ban Vin vill., Xuan Lien Nature Reserve, shale mountains, around point 19°58′18″N 104°59′10″E, 950-1200 m.
In primary closed evergreen seasonal tropical broad-leaved submontane forests on slopes of mountains.
Perennial herb, up to 1.5-2 m tall on shady wet slope. Clustered. HAL 11152 18 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