Asplenium - Aspleniaceae

Asplenium angolense Baker

 

 

 

 

Synonyms

Common name

Description

Rhizome erect or shortly creeping, to 5 mm diameter; rhizome scales dark brown, narrowly triangular ? in outline, margin entire, apex acute, to 1.5 mm long, with paler margins. Fronds tufted, to 30 cm long, proliferous in centre of terminal pinna. Stipe 9–25 cm long, with scattered scales similar to those of rhizome. Lamina ovate in outline, 8–13 x 7–10 cm, pinnate, the lower pinnae hardly or not decrescent, the terminal pinna very similar to the lateral ones and the same size. Pinnae 2–3 pairs, (sub-)opposite, to 6 x 2 cm, shortly petiolate, narrowly ovate in outline, base slightly asymmetric, margin crenate, glabrous or nearly so. Rhachis slightly winged, with some scattered scales. Sori many on veins, linear, to 10 mm long; indusium linear, entire, to 0.7 mm wide, membranous.

Notes

The proliferous fronds with the gemmae halfway up the terminal pinna seems to be characteristic for A. angolense.
This species might also occur in Tanzania and Uganda.

Derivation

angolense: of Angola, type specimen from Angola.

Habitat

Dense shade in intermediate forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Angola, Dem. Republic of Congo, Kenya.

Growth form

Terrestrial.

Literature

  • Beentje, H.J. (2008) Aspleniaceae. Flora of Tropical East Africa, Page 13. (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 79.
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