Asplenium - Aspleniaceae

Asplenium lobatum Pappe & Rawson

Photo: JE. Burrows
South Africa

Photo: P. Ballings
Mozambique

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Zimbabwe

Photo: P. Ballings
Zimbabwe

 

 

 

 

Synonyms

Asplenium lobatum Pappe & Rawson var. pseudoabyssinicum Schelpe & N.C. Anthony
Asplenium gracile Pappe & Rawson
Asplenium erectum Bory ex Willd. var. gracile (Pappe & Rawson) Tardieu
Asplenium erectum Bory ex Willd. var. lobatum (Pappe & Rawson) Sim

Common name

Description

Rhizome erect, up to 7 mm diameter; scales up to 6 mm long, lanceolate, attenuate, pale brown. Fronds tufted, not proliferous or occasionally proliferous at the base of the lamina. Stipe up to 23 cm, stipe and rhachis matt brown, glabrous. Lamina 15-40 cm × 4-15 cm, 2-pinnate to 4-pinnatifid, narrowly lanceolate-elliptic in outline, lower pinnae variously reduced. Pinnae glabrous, incised into rhombic pinnules that are divided into 2- to 3-fid or linear acute lobes.  Sori linear to oblong (oval when dehisced), not marginal, 2-6 per pinnule, indusium entire. 

Notes

Differs from similar species by having oval, not marginal sori and gradually decrescent basal pinnae. It can be distinguished from A. varians by having a more dissected lamina and more rounded lobe margins.
Burrows, J.E. (1990) and Crouch N.R. et al. (2011), distinguish 2 varieties: var. lobatum is 2-pinnate (to 3-pinnatifid), has 2-5 pairs of basal pinnae reduced and is not gemmiferous; var. pseudoabyssinicum is 3-pinnate to 4-pinnatifid, basal pinnae are not reduced and is often gemmiferous on the stipe.

Derivation

lobatum: lobed; this fern has a separate acroscopic lobe on each pinnule

Habitat

Deeply shaded forest floor in evergreen forest..

Distribution worldwide

Africa, Madagascar.

Distribution in Africa

Malawi, Mozambique, South Africa, Swaziland, Zimbabwe.

Growth form

Lithophytic, terrestrial.

Literature

  • Burrows, J.E. (1990) Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 240 - 242. (Includes a picture).
  • Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011) Ferns of Southern Africa, A comprehensive guide. Struik Nature. Pages 636 - 639. (Includes a picture).
  • Jacobsen, W.B.G. (1983) The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 349 - 350. (Includes a picture).
  • Roux, J.P. (2001) Conspectus of Southern African Pteridophyta.Southern African Botanical Diversity Network Report, 13 Page 167.
  • 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 89.
  • Schelpe, E.A.C.L.E. (1970) Pteridophyta.Flora Zambesiaca, 0 Page 177. (Includes a picture).

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