Pteris - Pteridaceae

Pteris similis Kuhn

 

 

 

 

Synonyms

Pteris congoensis H.Christ
Pteris molunduensis Hieron.

Common name

Description

Rhizome erect to 15 cm; rhizome scales linear-lanceolate in outline, to 3 mm long, with black central stripe, margins pale, entire. Fronds 6–10, tufted or solitary, trailing or scandent to 3 m and hanging down apically, often rooting at tips, 1.8–4(–6) m long. Stipe straw-coloured, violaceous or brownish at the base, 30–50 cm long, channelled above, bristly. Lamina lanceolate in outline, 0.5–3.4(–5.5) m long, up to 60 cm wide, pinnate. Pinnae oblong-lanceolate in outline, in 10–30 pairs, 8–35 x 3.2–12.5 cm wide, pinnatifid; ultimate segments in 12–28 pairs, oblong-lanceolate in outline, 1–8.5 x 0.3-1 cm, the terminal segments 1.5–4 cm long; sometimes a few basal segments are again pinnate so that some pinnae are partly bipinnatifid. Rhachis bristly or with fine spines and costae and costulae usually spinulose beneath; rhachis not or scarcely winged; veins forming narrow areoles along the costa and anastomosing in the lobes. Sori occupying 3/4–7/8 of the lobes, often extending right around the broad sinuses, the sterile apices toothed.

Notes

Derivation

Habitat

Primary forest, swamp forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Angola, Cameroon, Central African Republic, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Sudan and South Sudan, Tanzania , Togo, Uganda.

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 175.
  • Verdcourt, B. (2002) Pteridaceae. Flora of Tropical East Africa, Pages 11 - 12. (Includes a picture).
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