Athyrium - Woodsiaceae

Athyrium rondoense Verdc.

 

 

 

 

Synonyms

Common name

Description

Rhizome creeping; rhizome scales blackish or black-veined with a latticed appearance, ± 1.5 mm long. Frond single, 15–40 cm tall. Stipe slender, 10–20 cm long with few scales and dense very short hairs. Lamina up to 20 x 15 cm, tripartite; pinnae confocal, simply pinnate to bipinnate, broadly lanceolate in outline, apex gradually tapering to a point, up to 18 x 6 cm; each pinnae with 6–9 pairs of pinnules; pinnules up to c. 5 x 2 cm, the apical ones reduced, toothed only at the apex, running together and narrowly decurrent into each other resembling a series of fish-tails; lower pinnules deeply divided into ± 6 elliptic lobes, the largest c. 15 x 8mm, ± entire to bluntly or subacutely lobed or toothed; main lobes of largest pinnules decurrent, separated by narrowly winged midrib 1–2 mm wide. Sori 1–4 per pinna-lobe, ± 1 mm wide; indusium fimbriate and hairy.

Notes

Derivation

rondoense: this fern was first found on the Rondo plateau in Tanzania.

Habitat

Evergreen forest of Milicia-Albizia-Dialium, in small gully and amphitheatre around well on escarpment, 650m.

Distribution worldwide

See African distribution.

Distribution in Africa

Tanzania .

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 214.
  • Verdcourt, B. (2003) Woodsiaceae. Flora of Tropical East Africa, Page 12.
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