FLORA OF VIETNAM Polypodiaceae s.l. Vittaria hainanensis C. Chr. ex Ching
Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountains.
Primary and secondary evergreen broad-leaved forest on very steep slopes and cliffs of highly eroded red-brown sandstone at elevation 1000-1050 m a.s.l. around point 20°42′02.1N 104°37′23.1E.
Lithophytic fern on shady mossy wet cliff and large boulders. Occasional.