Asplenium inaequilaterale Willd.
  • Sp. Pl.


Cite taxon page as 'WFO (2020): Asplenium inaequilaterale Willd. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001108079. Accessed on: 27 May 2020'

Morphology

Rhizome erect, set with dark brown rhizome scales. Pinna with margin unequally incised to form multifid lobes, alternating deeper and shallower incissions, simple. Lamina membranous to herbaceous, up to 320 x 130 mm, not decrescent basally.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Plants epilithic. Rhizome short, erect to suberect, to 20 mm long, to 4 mm in diameter, set with roots, crowded persistent stipe bases and scales, scales crustaceous, atrocastaneous to black, clathrate, sessile, subulate to lanceolate, cordate to cordate-imbricate, entire or with scattered, pluricellular recurved outgrowths along the margin, apex terminates in a thin-walled cell, to 5 mm long, to 0.7 mm wide. Fronds crowded, caespitose, erect, to 430 mm long; stipe firm, castaneous, matt, terete, to 210 mm long, to 1.6 mm in diameter, narrowly green-winged to the base, base sparsely set with scales similar to those on the rhizome, higher up with filiform clathrate scales terminating in an elliptic thin-walled cell, to 1 mm long, and 3 or 4-celled hairs terminating in an enlarged obovate thin-walled cell, to 0.3 mm long; lamina 1-pinnate, narrowly elliptic, to 230 mm long, to 68 mm wide, with up to 17 petiolated pinna pairs; rachis firm, castaneous to greenish higher up, shallowly sulcate adaxially, narrowly green-winged, set with filiform scales and hairs similar to those on the stipe, glabrous later; pinnae basal pinnae petiolate, petiole to 1.5 mm long, sessile towards the apex, herbaceous, dark to mid-green, opposite to alternate, basally more widely spaced than apically, often slightly overlapping, basal 2-4 pairs often gradually reduced, inequilaterally lanceolate to trapezoid, acroscopically truncate, basiscopically excavate, usually alternately shallowly and deeply dentate, to 38 mm long, to 10 mm wide, glabrous adaxially and abaxially; costa adaxially raised, convex. Venation anadromous, evident, pinnately branched, branches forked, ending in the teeth near the margin. Sori linear, usually at or above a vein fork, to 4 mm long; indusium chartaceous, stramineous, transversely narrowly elliptic, entire, to 4 mm long, to 1.2 mm wide; sporangium long-stalked, uniseriate, 3- seriate below the capsule, capsule globose in lateral view, annulus with 19(-22) indurated annulus cells, epistomium 2(-3)-celled, hypostomium 4(-5)-celled. Spores 64 per sporangium, brown, elliptic, monolete, perispore forms broad reticulate wings, erose, the areas between the wings irregularly echinulate, exospore (30-)32.2(-36) x (20-)22.3(-24) µm.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Rhizome erect, up to 4 mm in diameter, set with dark brown, entire, lanceolate-attenuate rhizome-scales c. 2.5 mm long. Fronds tufted, firmly membranous, not gemmiferous; stipe greenish brown, subglabrous at maturity; lamina narrowly oblong-acuminate, up to 320 x 130 mm, winging rhachis, pinnate, lower pinnae not decrescent; pinnae in 12-20 pairs, narrowly oblong, obtuse to attenuate, base unequally cuneate, crenate-serrate, crenations emarginate, upper surface glabrous, lower surface set with scattered minute scales; apical segment crenate-serrate. Sori borne on outermost branch-vein of a fork, midway between costa and margin, c. 4 mm long; indusium membranous, entire, c. 0.8 mm long.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Habitat

    Forest floors and streambanks in dense shade.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 1
    • ]. 

    Forest floors and streambanks in dense shade, 25-1400 m.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Epilithic and restricted to moist, deeply shaded forests where the plants generally grow on wet or seasonally wet moss-covered rocks in or near perennial steams. Not edaphically bound.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Distribution

    The species is widespread in sub-Saharan Africa and the western Indian Ocean region.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 2
    • ]. 

    Transkei, Natal, Swaziland, Transvaal, Zimbabwe, Mozambique, Malawi, Zambia, Angola, Zaire, Tanzania, Kenya, Uganda, Sudan, Ethiopia, Gabon, Cameroun, Togo, Ghana, Liberia, Fernando Po, São Tomé, Reunion and Comoro Islands.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 3
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Alagoas
    • Bahia
    • Ceará
    • Pernambuco
    • Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Espirito Santo
    • Minas Gerais
    • Rio de Janeiro
    • São Paulo
    • Mato Grosso
    • Mato Grosso do Sul

      Bibliography

    • 1 Herman, PPJ; Retief, E. 1997. Plants of thenorthern provinces of South Africa: keys and diagnostic characters. Strelitzia 6: 1 - 681. National Botanical Institute, Pretoria.
    • 2 Roux, JP. 2003. Swaziland ferns and fern allies.
    • 3 Schelpe, EACLE; Anthony, NC. 1986. Pteridophyta. In: O.A. Leistner (ed.). Fl. S. Africa : 1 - 278.
    • 4 Sp. Pl.

     Information From

    Aspleniaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • B All Rights Reserved
    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    http://floradobrasil.jbrj.gov.br
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • C Group Brazil Flora, REFLORA Program
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).