Cheilanthes - Sinopteridaceae

Cheilanthes angustifrondosa Alston

 

 

 

 

Synonyms

Common name

Description

Rhizome creeping; rhizome scales linear and tapering to a fine point, 4.5–5 × 0.5 mm, brown with a dark central stripe and pale margins. Fronds monomorphic, tufted, 22–55 cm tall. Stipe 3–14 cm long, purple-brown or chestnut to black, glabrous except at the extreme base. Lamina 1–2-pinnate, if 1-pinnate then pinnae deeply pinnatifid, narrowly oblong-lanceolate in outline, 17–49 × 3–8.5 cm; pinnae in 15–18 pairs, oblong-lanceolate in outline, 1–6 × 0.5–2.8 cm; pinnules or ultimate segments narrowly oblong, 0.5–1 cm × 2–5 mm, apex rounded, crenate to pinnatifid, glabrous; venation obscure. Sori on margins of segments, minute, less than 1 mm in diameter; indusium minute, membranous, entire.

Notes

Differs from other Cheilanthes species by lacking a powdery substance on the undersurface of the lamina, the lamina is glabrous on both surfaces and the fronds are narrowly elliptic & 2-3 pinnatifid.

Derivation

Habitat

Among rocks in woodland, rocky hillsides, rock crevices in escarpment forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Angola, Dem. Republic of Congo, Mozambique, Tanzania , Zambia.

Growth form

Lithophytic, terrestrial.

Literature

  • Kornas, J. (1979) Distribution and ecology of the Pteridophytes in Zambia. Polska Akademia Nauk Wydzial II Nauk Biologicznych. Page 47.
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 61.
  • 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 180.
  • Schelpe, E.A.C.L.E. (1970) Pteridophyta. Flora Zambesiaca, 0 Pages 123 - 124.
  • Verdcourt, B. (2002) Adiantaceae. Flora of Tropical East Africa, Pages 33 - 34.
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