FLORA OF VIETNAM Polypodiaceae s.l. Polystichum sp.
Vietnam, Ha Giang Prov., Quan Ba Distr, Can Ty Municipality, about 3 km to NWW of Quan Ba town, around point 23°05′49″N, 105°00′28″E at elevation about 1200 m a.s.l.
Primary mossy cloudy coniferous forest with Pseudotsuga sinensis on tops of high rocky ridge composed with highly eroded marble-like limestone along left side of Mien river.
Lithophytic fern on shady rocky slope. Very common.