FLORA OF VIETNAM Polypodiaceae s.l. Polystichum sp.
Vietnam, Ha Giang Prov., Dong Van Distr, Ta Lung Municipality, vicinities of Xa Lung village around point 23°14′50″N, 105°21′34″E at elevation about 1450-1550 m a.s.l.
Degraded primary coniferous forest with Pseudotsuga sinensis, Tsuga chinensis and Pinus sp. on very steep rocky slopes and along tops of narrow rocky remnant ridge composed with highly eroded marble-like limestone.
Lithophytic fern on very steep rocky mossy slope. Common.