Asplenium inaequilaterale Willd.

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Asplenium inaequilaterale

Picture: Petra Ballings

Asplenium inaequilaterale

Picture: Petra Ballings

Asplenium inaequilaterale

Picture: Petra Ballings
Chirinda Forest

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Synonyms: Asplenium brachyotus Kunze
Asplenium erectum Bory ex Willd. var. brachyotus (Kunze) Sim
Asplenium laetum sensu Sim
Asplenium suppositum Hieron.
Common names:
Status: Native
Rhizome erect, up to 8 mm diameter; scales 2.5 mm long, dark brown, entire. Fronds not proliferous, tufted. Stipe up to 19 cm, stipe and rhachis pale to dark matt brown, hairless. Lamina 12-30 cm × 4-10 cm, pinnate and narrowly triangular in outline. Pinnae 12-20 pairs, lanceolate, glabrous, base asymmetric with a well developed acroscopic lobe, apex acute, margins irregularly crenate. Sori 5-12 pair, linear, situated on each pinnae at 45 degrees to the costa, indusium entire.  
Type location:
Notes: Differs from similar species by not having basal pinnae reducing in size, base strongly asymmetrical but the midrib does not form the lower margin for a significant distance.
Derivation of specific name: inaequilaterale: unequally sided, the pinnae bases of this species are asymmetric.
Habitat: Deep shade in moist evergreen forest. Terrestrial or lithophyte.
Altitude range: 780 - 1500 m
Worldwide distribution: Angola, Bioko, Burundi, Cameroon, Central African Republic, DRC, Ethiopia, Gabon, Ghana, Guinea, Kenya, Liberia, Malawi, Mozambique, Soa Tomé, Sierra Leone, South Africa, Sudan, Eswatini, Tanzania, Togo, Uganda, Zambia, Zimbabwe, Madagascan region
Zambian distribution (Flora Zambesiaca): N,E,S
Zambian distribution (Provinces): N
Growth form(s): Lithophyte, terrestrial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species

Burrows, J.E. (1990). Southern African Ferns and Fern Allies. Frandsen, Sandton. Pages 222 - 223. (Includes a picture).

Burrows, J.E. & Burrows, S.M. (1993). An annotated check-list of the pteridophytes of Malawi Kirkia 14(1) Page 92.

Chapano, C. & Mamuto, M. (2003). Plants of the Chimanimani District National Herbarium and Botanic Garden, Zimbabwe Page 7.

Crouch, N.R., Klopper, R.R., Burrows, J.E. & Burrows, S.M. (2011). Ferns of Southern Africa, A comprehensive guide Struik Nature Pages 602 - 603. (Includes a picture).

Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 9.

Dowsett-Lemaire, F. (1989). The flora and phytogeography of the evergreen forests of Malawi. I: Afromontane and mid-altitude forests; Bull. Jard. Bot. Nat. Belg. 59(1/2) Page 25.

Jacobsen, W.B.G. (1983). The Ferns and Fern Allies of Southern Africa. Butterworths, Durban and Pretoria. Pages 347 - 348. (Includes a picture).

Kornas, J. (1979). Distribution and ecology of the Pteridophytes in Zambia Polska Akademia Nauk Wydzial II Nauk Biologicznych Page 100.

Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 5.

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 Page 88.

Schelpe, E.A.C.L.E. (1970). Pteridophyta Flora Zambesiaca Page 176. (Includes a picture).

Other sources of information about Asplenium inaequilaterale:

Our websites:

Flora of Caprivi: cultivated Asplenium inaequilaterale
Flora of Malawi: Asplenium inaequilaterale
Flora of Mozambique: Asplenium inaequilaterale
Flora of Zimbabwe: Asplenium inaequilaterale

External websites:

African Plants: A Photo Guide (Senckenberg): Asplenium inaequilaterale
African Plant Database: Asplenium inaequilaterale
BHL (Biodiversity Heritage Library): Asplenium inaequilaterale
EOL (Encyclopedia of Life): Asplenium inaequilaterale
GBIF (Global Biodiversity Information Facility): Asplenium inaequilaterale
Google: Web - Images - Scholar
iNaturalist: Asplenium inaequilaterale
IPNI (International Plant Names Index): Asplenium inaequilaterale
JSTOR Plant Science: Asplenium inaequilaterale
Mansfeld World Database of Agricultural and Horticultural Crops: Asplenium inaequilaterale
Plants of the World Online: Asplenium inaequilaterale
Tropicos: Asplenium inaequilaterale
Wikipedia: Asplenium inaequilaterale

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-23

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2023). Flora of Zambia: Species information: Asplenium inaequilaterale., retrieved 9 December 2023

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