Lastreopsis - Dryopteridaceae

Lastreopsis subsimilis (Hook.) Tindale

 

 

 

 

Synonyms

Gymnogramma subsimilis Hook.
Ctenitis subsimilis (Hook.)Tardieu
Dryopteris subsimilis (Hook.) C.Chr.
Dryopteris bicolor Bonap.

Common name

Description

Rhizome creeping, very big; rhizome scales narrow, apex tapering, margin entire, brown, cells with thin walls. Fronds monomorphic, tufted, subcoriaceous. Stipe 30-40 cm long, striped, grooved, with few short brown hairs in the groove only. Lamina 2-pinnatifid to 3-pinnatifid at the base, deltoid-lanceolate in outline, 40 x 40 cm; pinnae regularly increasing, petiolate, each pinnule tapering, lower segment more developped; lowermost pinnae with long petiole, pinnules lobed, first pinnule divided to the costa into rounded slightly toothed lobes, middle pinnae lobed to about half their width, lobes rounded, entire, apical pinnae lobed, decurrent; rhachis and surfaces hairless, costae with short hairs on the upper surface, no glands; veins 2 or 4 forked. Sori long, oblong; exindusiate.

Notes

Derivation

Habitat

Terrestrial in forested ravines, 610-915 m.

Distribution worldwide

See African distribution.

Distribution in Africa

Benin, Cameroon, Equatorial Guinea (incl. Bioko), Gabon, Ivory Coast, Liberia, Nigeria.

Growth form

Terrestrial.

Literature

  • 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 135.
  • Thardieu-Blot, M.L. (1964) Ptéridophytes vol.8. Flore du Gabon, Pages 166 - 167.
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