Didymoglossum - Hymenophyllaceae

Didymoglossum lenormandii (Bosch) Ebihara & Dubuisson






Trichomanes lenormandii Bosch.
Microgonium lenormandii (Bosch.) Copel.

Common name


Rhizome creeping, filiform, with dense brown hairs to 0.5 mm. Fronds spaced 0.2–1.2 cm apart. Stipe 1–20 mm long, winged in the upper half, glabrous except for base. Lamina lanceolate or deltoid in outline, (1–)2–4.5 x 0.5–3 cm, pinnately lobed to bipinnate; pinnae 2–5 mm wide, obtuse, glabrous; pinnately veined, intramarginal vein present but not very distinct, often interrupted; false veins many. Sori many, lateral, one per lobe; indusium narrowly turbinate, 1–1.5 mm long, 0.4–0.5 mm in diameter, mouth not dilated; receptacle exserted for up to 12 mm, often recurved.



lenormandii: named after Sébastien-René Lenormand (1796-1871), French botanist, algologist and plant collector.


Moist forest by stream.

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

Tanzania .

Growth form

Epiphytic, terrestrial.


  • Beentje, H.J. (2008) Hymenophyllaceae.Flora of Tropical East Africa, Pages 15 - 18. (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 42.