N.Vietnam, Ha Tinh Prov., Huong Son Distr., Son Kim Municipality, Rao Bun stream around Rao An FPD station at 18°25′18′'N, 105°13′15′'E. Primary and secondary broad-leaved evergreen closed wet forest on very
steep shale slopes of river canyon at elevation about 200-300 m a.s.l.
Terrestrial fern. Very common. HAL 5145 6 May 2004 (Photo)