Son La Prov., Quynh Nhai Distr., Ca Nang Comm., Pu Cau Mt., 600-900 m, around point 21050′46” N, 103035′52” E), about 2-4 km to NE of Quynh Nhai FPD Station (around point 21050′10” N, 103034′12” E, 203 m), medium and upper parts of slope of limestone mountains.
In heavily logged primary closed evergreen broad-leaved submontane forests and scrubs suffered from fire.
Scattered. Perennial herb.
HAL 11291 C 29 Nov 2007 Coll.: P.K. Loc & N.T. Vinh
Grant from MOST, Council for Natural Science, Section of Life Sciences (6.077.06), Vietnam