Fam. Polypodiaceae s.l.

Polystichum sp.

N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, village Phia Khao, Lung Li valley, around point 22º16'10''N, 105º31'01''E, Cot Moc mountain at elevation 800-900 m a.s.l. Primary broad-leaved evergreen closed forest on very steep slopes and cliffs near tops of rocky ridge composed with solid marble-like stratified limestone. Lithophytic fern on vertical cliffs. Very common.

No HAL 4800a 23 May 2004 (Photo).

Collectors: L.Averyanov, N.T.Hiep, P.V.The, N.T.Vinh.