Athyrium - Woodsiaceae

Athyrium ammifolium (Mett.) C.Chr.






Asplenium ammifolium Mett.

Common name


Rhizome erect; rhizomes scales lanceolate in outline, margins entire, cells very thin-walled, red-brown. Fronds monomorphic, somewhat leathery. Stipe 15-20 cm, strawcoloured, smooth. Lamina bipinnate, ovate in outline, 30-80 x 10-12 cm; pinnae c. 10 pairs, alternate, sessile, spaced c. 4 cm, making an angle of 80° with the rhachis, apex long tapering, middle pinnae 7-8 x 1.5 cm; pinnules triangular, oblong, 2 x 0.3 cm, acute, lobed to 1/2 of their width; lobes apex acute, base unequal, first basiscopic lobe more developed; rhachis smooth; veins forked. Sori slightly elongated along the vein, curved; indusiate.




High altitude forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Cameroon, Equatorial Guinea (incl. Bioko).

Growth form



  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Page 312.
  • Tardieu-Blot, M.-L. (1964) Ptéridophytes vol.3.Flore du Cameroun, Page 230. (Includes a picture).