FLORA OF VIETNAM Polypodiaceae s.l. Microlepia sp.
N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22°54′59′'N, 106°31′44′'E, at elevation 500-600 m a.s.l.
Secondary shrubs on very steep mossy rocky slope of N exposition of rocky ridge composed with light gray solid marble-like highly eroded crystalline limestone along Quy Son River valley. Lithophytic and terrestrial fern. Not common. HAL 5749 15 June 2004