Asplenium lobatum Pappe & Rawson


Cite taxon page as 'WFO (2020): Asplenium lobatum Pappe & Rawson. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001110838. Accessed on: 08 Apr 2020'

Morphology

Rhizome erect, up to 7 mm in diameter, set with dark brown, lanceolate-acuminate rhizome scales. Lamina narrowly elliptic, margin crenate or obtusely dentate. Lower pinnae gradually decrescent. Sori 3-6 per pinnule.

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

    Plants terrestrial or epilithic. Rhizome erect to suberect, to 20 mm long, to 4 mm in diameter, set with roots, crowded stipe bases and scales, scales chartaceous, atrocastaneous, clathrate, sessile, subulate to narrowly lanceolate, cordate, margins irregularly set with short filiform outgrowths, apex terminates in an oblong thin-walled cell, to 5 mm long, to 0.7 mm wide. Fronds crowded, caespitose, erect to arching, to 475 mm long; stipe firm, castaneous, terete, to 120 mm long, to 1.2 mm in diameter, narrowly green-winged for most of the length, initially moderately set with hairs and scales, subglabrous later, hairs 3-5-celled, clavate, to 0.25 mm long, scales chartaceous, atrocastaneous, clathrate, stalked, subulate to filiform, the larger often with short filiform outgrowths along the margin, apex terminates in an oblong thin-walled cell, to 5 mm long, to 0.7 mm wide; lamina anadromous, 2-pinnate, narrowly elliptic, to 360 mm long, to 85 mm wide, with up to 23 petiolated pinna pairs; rachis firm, castaneous, green towards the apex, terete, narrowly green-winged, sparsely set with hairs and scales similar to those on the stipe, glabrous later; pinnae petiolate, petiole to 1 mm long, opposite to alternate, basally more widely spaced than apically, pinnae in the lower half gradually reduced, ovate to narrowly ovate, to 45 mm long, to 16 mm wide, with up to 5 pinnule pairs; pinna-rachis terete, narrowly winged, glabrous; pinnules herbaceous, sessile, rhombic to flabellate, coarsely serrate or divided into 2-fid or 3-fid lobes, lobe apices entire or shallowly repand to erose, to 12 mm long, to 10 mm wide, glabrous adaxially and abaxially. Venation anadromous, evident, flabellately forked, ending in the teeth near the margin. Sori linear, usually on the terminal vein branches, but often also at a fork, to 3.5 mm long; indusium chartaceous, stramineous, linear, entire, to 3.5 mm long, to 0.3 mm wide; sporangium long-stalked, uniseriate, 3-seriate below the capsule, capsule globose to broadly elliptic in lateral view, annulus with (17-)19 indurated annulus cells, epistomium 2- celled, hypostomium 4-celled. Spores 64 per sporangium, brown, elliptic, monolete, perispore forms broad reticulate wings, exospore (28-)31.3(-34) x (18-)20.1(-22) µm.

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

    Perennial with short rhizome. Fronds arching, to 45 cm, stipe subglabrous, lamina herbaceous, narrowly elliptic, 2-pinnate to 4-pinnatifid, pinnae narrowly oblong, pinnules rhombic, coarsely serrate or lobed, sparsely scaled beneath. Sori 3-6 per pinnule, indusium entire.

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

    Rhizome erect, up to 7 mm in diameter, set with dark brown, lanceolate-acuminate, subentire rhizome-scales up to 6 mm long with narrow paler borders. Fronds tufted, membranous, usually not gemmiferous (occasionally proliferating at lamina base); stipe matt greenish brown, subglabrous at maturity; lamina narrowly elliptic, up to 350 x 135 mm, apex acuminate, winging rhachis for most of its length, 2- pinnate to 4-pinnatifid, lower pinnae decrescent; pinnae narrowly oblong-deltate, basal acroscopic pinnule overlapping rhachis; pinnules rhombic to deltate, coarsely serrate or divided into 3-fid to 2-fid or linear acute lobes, upper surface glabrous, lower surface set with occasional, minute, hair-like, pale scales. Sori 3-6 per pinnule, c. 2 mm long (up to 4 mm); indusium membranous, entire, c. 0.2 mm broad.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 4
    • ]. 

    Habitat

    On deeply shaded floors of moist forest and occasionally a low-level epiphyte.

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

    Terrestrial or epilithic, in leaf-litter on seasonally moist forest floor, deeply shaded. Not edaphically bound.

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

    Moist, deeply shaded forests, to 800 m.

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

    Deeply shaded floors of moist forest and occasionally a low-level epiphyte, 1100-2000 m.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 4
    • ]. 

    Distribution

    The species appears to be restricted to the eastern parts of south tropical and southern Africa and the western Indian Ocean region.

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

    Knysna to E Africa and Madagascar.

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

    Cape Province, Transkei, Natal, Transvaal, Zimbabwe, Malawi, Mozambique and Madagascar.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 4
    • ]. 

      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 Roux, JP. 2012. Pteridophytes. 31 - 47. South African National Biodiversity Institute, Pretoria.
    • 4 Schelpe, EACLE; Anthony, NC. 1986. Pteridophyta. In: O.A. Leistner (ed.). Fl. S. Africa : 1 - 278.

     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
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).