Asplenium - Aspleniaceae

Asplenium emarginatum P. Beauv.

 

 

 

 

Synonyms

Common name

Description

Rhizome erect or short-creeping, to 10 mm diameter; rhizome scales ovate to lanceolate in outline, apex long tapering to a point, margin (sub)entire, to 7 mm long, persistent,. monomorphic, tufted or sometimes shortly spaced, erect, 35–90 cm long, proliferous at pinnae apices, the terminal lobe similar to the laterals but usually larger, thin. Stipe 10–50 cm long, grooved, pale brown, with scales to 6 mm long at the base. Lamina (narrowly) ovate to lanceolate in outline, pinnate; pinnae in 1–5 pairs, ovate to oblong in outline, apex notched with an abrupt and wedge-shaped sinus and a gemma in the notch, base unequally wedge-shaped, margin with rounded teeth, 6–23 x 2.4–5.5 cm, sessile or very shortly petiolate, hairless on both surfaces; veins forked; rhachis similar to stipe. Sori many and usually closely parallel on the ascending veins, almost reaching the costa but ending quite a way from the margin, brown and oblong, to 2.5 cm long; indusium whitish, membranous, entire, linear, persistent.

Notes

Derivation

emarginatum: notched at the apex.

Habitat

Moist forests, usually in deep shade; less often in semi-deciduous forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Angola, Benin, Burundi, Cameroon, Central African Republic, Congo, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Gabon, Ghana, Guinea, Ivory Coast, Kenya, Liberia, Sudan and South Sudan, Tanzania , Togo, Uganda.

Growth form

Terrestrial.

Literature

  • Beentje, H.J. (2008) Aspleniaceae. Flora of Tropical East Africa, Pages 13 - 14. (Includes a picture).
  • 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 84.
  • Tardieu-Blot, M.-L. (1964) Ptéridophytes vol.3. Flore du Cameroun, Page 192. (Includes a picture).
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