Asplenium - Aspleniaceae

Asplenium holstii Hieron.

Photo: BT. Wursten
Mozambique

Photo: BT. Wursten
Mozambique

Photo: BT. Wursten
Mozambique

 

 

 

 

Synonyms

Asplenium africanum Desv. var. holstii (Hieron.) Tardieu

Common name

Description

Rhizome erect or shortly ascending, up to 20(-60) mm thick; rhizome scales up to 13 x 2.7 mm, brown, ovate to narrowly triangular in outline, margin sparsely fringed, apex gradually tapering to a point and ending in a hair. Fronds tufted, erect or pendulous. Stipe pale matt grey-brown, up to 90 mm long, at the very base with scales similar to the rhizome, elsewhere with similar but smaller scales than rhizome scales, becoming (sub)glabrous with age. Lamina simple, up to 1 m long and 7 cm wide, elliptic to lanceolate-linear in outline, margins entire to wavy, apex tapering to a point to rounded, hairless. Sori linear, 5-33 mm long, set at 45 degrees to the midrib; indusium entire, membranous, 0.5-1.4 mm wide.

Notes

Simple fronds

Derivation

holstii: named after C.H.E.W. Holst, German horticulturist.

Habitat

Deeply shaded areas near streams in evergreen riverine forest.

Distribution worldwide

See African distribution.

Distribution in Africa

Kenya, Malawi, Mozambique, Tanzania , Zimbabwe.

Growth form

Epiphytic, lithophytic.

Literature

  • Beentje, H.J. (2008) Aspleniaceae. Flora of Tropical East Africa, Page 10. (Includes a picture).
  • Burrows, J.E. (1990) Southern African Ferns and Fern Allies. Frandsen, Sandton. Page 214. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 331 - 332.
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta. Southern African Botanical Diversity Network Report, 13 Page 166.
  • 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 87.
  • Schelpe, E.A.C.L.E. (1970) Pteridophyta. Flora Zambesiaca, 0 Page 170. (Includes a picture).
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