Crepidomanes - Hymenophyllaceae

Crepidomanes fallax (H. Christ) Ebihara & Dubuisson






Trichomanes fallax Christ.
Vandenboschia fallax (Christ) Copel.

Common name


Rhizome creeping, much branched, with dense dark brown hairs to 0.3 mm long. Fronds spaced up to 35 mm apart, glabrous. Stipe 3–30 mm long, winged in upper part, glabrous except for very base. Lamina grey-green to dark green, narrowly lanceolate in outline, 6–16 x 2–3.5 cm, bipinnatifid, base gradually tapering; pinnae 6–13 on each side, lanceolate in outline, to 2.2 x 0.5 cm, decurrent on rhachis, ascending, divided in up to 7 segments; ultimate segments to 12 x 2 mm, obtuse to slightly emarginate. Rhachis broadly winged. Sori marginal, axillary or terminal, in mid- and upper part of lamina, always sunk into the lobe; indusium turbinate to campanulate, 1.5–2 mm long, to 0.8 mm in diameter, the mouth dilated and to 1.5 mm in diameter; receptacle exserted to 5 mm.




Moist forest.

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

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

Growth form

Epiphytic, lithophytic.


  • Beentje, H.J. (2008) Hymenophyllaceae.Flora of Tropical East Africa, Page 24. (Includes a picture).
  • 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 39.