FLORA OF VIETNAM
Polypodiaceae s.l.
Polystichum sp.

N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, Phia
Khao village, Cau Muc locality 22°17′32′'N 105°31′27′'E.

Primary closed evergreen wet broadleaved and mixed forest with Pinus
kwangtungensis on very steep slopes and cliffs of remnant mountains
composed with highly eroded crystalline limestone near the top of
ridge at elev. 900-1000 m a.s.l.

Lithophytic fern on travertine deposits on vertical shady cliffs.
Occasional.

HLF 808 26 Dec. 2002.

Coll. Phan Ke Loc, L.Averyanov, Nguyen Anh Duc, To Van Thao, Mai Van
Xinh, Nguyen Tien Vinh.
Grant from Henry Luce Foundation.