FLORA OF VIETNAM Polypodiaceae s.l. Thelypteris sp.?
Son La Prov., Van Ho Distr., Tan Xuan Municipality, Cot Moc village, territory of Xuan Nha natural reserve, eastern slopes of Pha Luong Mountain.
Remnants of primary and secondary broad-leaved evergreen humid forest on very steep mountain slopes composed by shale and sandstone at elevation about 900-1450 m a.s.l. around point 20°40′33.3″N 104°39′00.3″E.
Lithophytic fern on wet stream rocks along narrow shady rocky stream canyon. Common.