Phu Tho Prov., Tan Son Distr., Xuan Son Comm., Can mt., 21010′02” N, 104054′24” E, mostly ca. 800-1000 m, ca. 5 km to NW of Coi vill., 21009′13” N, 104056′47” E, medium and upper parts of slope and ridges of limestone mountains.
Clustered, terrestrial, in slightly logged primary evergreen broad-leaved submontane forests. Leaves cordate inegally at base HAL 11262 22 Oct 2007 Loc’s Photos: 23407a-23407 Coll.: P.K. Loc, N.T. Vinh & L.P. Ngau
Grant from MOST, Council for Natural Science, Section of Life Sciences (6.077.06), Vietnam