FLORA OF VIETNAM
Polypodiaceae s.l.
Asplenium sp.

N. Vietnam, prov. Cao Bang, distr. Thach An, about 28 km to SE from
Cao Bang town (N 22°29′ E 106°28). Primary evergreen broadleaved
closed forest on steep slopes of remnant limestone ridge at 300-450 m
alt. Epilite fern on vertical shadow cliffs. Common.

CBL 956 06 Dec. 1998

International Botanical Expedition of the U.S.A. National Geographic
Society (grant No 6300-98)

Collectors: Averyanov L., N.Q.Binh, N.X.Tam.