Northern Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, to the S of Rao An village, around point 18°20′50′'N, 105°14′09′'E. Primary evergreen submontane seasonal broad-leaved and mixed (with Dacrycarpus) forest along granite ridge at 1100 m a.s.l. Lithophyte on vertical flanks of large shady mossy boulders. Leaves up to 0.5 m lg and 0.4 m wide. Locally abundant (at 1100-1150 m a.s.l.).