FLORA OF VIETNAM Polypodiaceae s.l. Pteridium sp.?
Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, north-eastern slopes of Phu Xai Lai Leng mountain system.
Primary very humid broad-leaved forest with Cunninghamia konishii as emergent on steep mountain slopes composed of gray shale at elevation 2100-2200 m a.s.l. around point 19°13′52.9″N 104°05′30.5″E.
Terrestrial fern with climbing fronds to 2 m long in rather open place along road cut. Very common.