Pellaea - Sinopteridaceae

Pellaea angulosa (Bory ex Willd.) Baker

 

 

 

 

Synonyms

Pteris angulosa (Bory ex Willd.) Baker
Pellaea articulata (Kaulf. ex Spreng.) Baker
Allusorus angulosus (Bory ex Willd.) Kuntze
Litobrochia articulata (Kaulf. ex Spreng.) C. Presl.
Doryopteris articulata (Kaulf. ex Spreng.) Fée

Common name

Description

Rhizome short, creeping, up to 7 mm in diameter; rhizome scales linearin outline, subentire, up to 5 mm long pale chestnut to dark brown. Fronds monomorphic, tufted, erect to suberect, 4-8, 10.5-90 cm tall, coriaceous. Stipe6-50 cm long, black, shining, with a few brown scales near the base. Lamina pinnate in the distal half of the lamina with a single pinna on the top resembling the lateral pinnae, to 3- to 2-pinnate on the lower pinnae, sharply triangular in outline, 4.5-40 x 13-43 cm; pinnae with 5-7 pairs of pinnules; ultimate segments narrowly triangular to lanceolate in outline, forming a long drawn out point, rounded to cordate base articulated to a short black petiole, glabrous on both surfaces; veins hardly visible, anastomosing; rhachis, secondary rhachis and petioles black, with short brown hairs on the upper surfaces. Sori marginal, continuous to within a few milimeters of the apex and petiole; indusium entire, membranous, continuous.

Notes

Can be seperated from Cheilanthes virides by the articulated pinnae, the obscure and anastomosing venation, the basiscopical developed basal pinnae.

Derivation

angulosa: strongly angled; an allusion to the sharp angles created by the rhachis, secondary rachises and pinnules.

Habitat

In tall, evergreen forest dominated by Chrysophyllum gorungosanum, on moist forest floor where an opening in the forest canopy occurs, evergreen forest in rocky places.

Distribution worldwide

Africa, Madagascar, Mauritius, Réunion, Seychelles (Mahé).

Distribution in Africa

Malawi, Mozambique, Tanzania , Zimbabwe.

Growth form

Terrestrial.

Literature

  • Burrows, J.E. (1990) Southern African Ferns and Fern Allies. Frandsen, Sandton. Page 172. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Page 272. (Includes a picture).
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 70.
  • Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar and neighbouring islands. Strelitzia 23, South African National Biodiversity Institute, Pretoria. Pages 188 - 189.
  • Schelpe, E.A.C.L.E. (1970) Pteridophyta. Flora Zambesiaca, 0 Page 131. (Includes a picture).
  • Verdcourt, B. (2002) Adiantaceae. Flora of Tropical East Africa, Pages 15 - 16.
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