Pellaea - Sinopteridaceae

Pellaea dura (Willd.) Hook. var. schweinfurthii (Hieron.) Verdc.

 

 

 

 

Synonyms

Pteridella schweinfurthii hieron.
Pellaea schweinfurthii (Hieron.) Hieron. ex Diels
Pellaea maxima Bonap.
Pellaea holstii sensu Tardieu
Pellaea dura (Willd.) var. holstii sensu Schelpe

Common name

Description

Rhizome shortly creeping to semi-erect, up to 5-7 mm in diameter; rhizome scales linear-lanceolate in outline, apex slowly tapering to a point, subentire, 3-7 mm long, reddish brown. Fronds monomorphic, tufted, erect, 7-50 cm tall, coriaceous. Stipe up to 25 cm long, dark brown, subglabrous with with dense short stiff hairs on upper surface and few hair-like brown scales near the base. Lamina pinnate but sometimes lower pinnae -3-pinnulate, ovate to lanceolate in outline, up to 24 cm × 10 cm; pinnae in 5-22(-25) pairs; pinnules narrowly elliptic to lanceolate in outline, apex rounded, cordate to rounded base articulated to a short petiole, 1-7.5(-9) x 0.3-2.5 cm, densely to sparsely hairy on both sides or becoming hairless above, paler green below; veins hardly visible and anastomosing; rhachis and secondary rhachises black, with short, soft hairs above, hairless below. Sori marginal, continuous; indusium entire, membranous, continuous.

Notes

Derivation

dura: hard, referring to the stiff fronds; schweinfurthii: named after Schweinfurth.

Habitat

Rock outcrops and pavements , shady gullies in woodland, wooded grassland and bushland.

Distribution worldwide

See African distribution.

Distribution in Africa

Burundi, Cameroon, Central African Republic, Dem. Republic of Congo, Ethiopia, Gabon, Kenya, Nigeria, Sudan and South Sudan, Tanzania , Uganda.

Growth form

Lithophytic, 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 190.
  • Verdcourt, B. (2002) Adiantaceae. Flora of Tropical East Africa, Pages 14 - 15.
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