Fam. Polypodiaceae s.l.

Adianthum gravesii

N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22º54'59''N, 106º31'44''E, at elevation 800-850 m a.s.l. Remnants of primary broad-leaved and coniferous forest on ridge tops and on very steep slopes and cliffs of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Lithophyte on wet shady travertine deposits on vertical cliffs. Not rare.

No HAL 5496 9 June 2004 (Photo)

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