FLORA OF VIETNAM Polypodiaceae s.l. Polypodium s.l.
Vietnam, Ha Giang Prov., Dong Van Distr, Sinh Lung Municipality, vicinities of Ha De village around point 23°12′23″N, 105°17′18″E at elevation about 1450 m a.s.l.
Degraded primary coniferous forest with Pseudotsuga sinensis on very steep rocky slopes and along tops of narrow rocky remnant Chong Sia ridge composed with highly eroded marble-like limestone.
Lithophytic creeping fern on very steep rocky mossy slope. Common.