Lastreopsis - Dryopteridaceae

Lastreopsis davalliiformis (Tardieu) Tardieu

 

 

 

 

Synonyms

Dryopteris davalliiformis Tardieu

Common name

Description

Rhizome widely creeping, thin; rhizome scales narrow brown, apex gradually tapering, base cordate, cells brown-walled with clear contents. Fronds monomorphic, spaced, thin. Stipe 25-40 cm long, striped-reddish, grooved, with scales near the base. Lamina 3-pinnate to 4-pinnatifid, deltoid in outline, 30-40 x 25-30 cm, light green; pinnae with the lowermost pair basiscopically developed, 17-20 x 6-7 cm, petiole 1 cm, divided into 3 cm long pinnate pinnules, middle pinnae slightly falciform, bipinnatifid with rounded pinnules, divided into decurrent wedge-shaped segments, the first segment on the side of the costula clearly more developed; rhachis grooved below; all axes finely set with short hairs; veins often with small gland on the lower surface. Sori rounded, situated at the veins ending, submarginal; indusium persistent, dark brown.

Notes

Derivation

Habitat

Close to waterfalls or streams.

Distribution worldwide

See African distribution.

Distribution in Africa

Cameroon, Gabon.

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 134.
  • Thardieu-Blot, M.L. (1964) Ptéridophytes vol.8. Flore du Gabon, Pages 165 - 166. (Includes a picture).
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