Crepidomanes - Hymenophyllaceae

Crepidomanes mettenii (C.Chr.) Ebihara & Dubuisson






Trichomanes mettenii C.Chr.
Trichomanes subsessile Mett. ex Kuhn
Trichomanes bipunctatum sensu Tardieu

Common name


Rhizome long creeping, set with thick black hairs. Fronds monomorphic, spaced, fan-shaped-pinnatifid, not proliferous. Lamina 1-2 x 1-2 cm, wedge-shaped to ovate in outline, divided in linear segments, subsessile, smooth, pale green; segments linear, apex rounded, flat, without longitudal folds; cells 70µ, with thick walls; false veins absent. Sori indusiate; indusium covered, tube oblong, opening expanded.



mettenii: named after Georg Heinrich Mettenius (1823-1866), German botanist born in Frankfurt am Main, professor at the University of Leipzig as well as director of its botanical garden, leading authority in the field of pteridology.


Wet tropical areas.

Distribution worldwide

See African distribution.

Distribution in Africa

Cameroon, Central African Republic, Congo, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Uganda.

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 40.
  • Tardieu-Blot, M.-L. (1964) Ptéridophytes vol.3.Flore du Cameroun, Pages 85 - 86. (Includes a picture).