Asplenium platyneuron (L.) Britton, Sterns & Poggenb.
  • Ferns N. Amer.
  • Ebony spleenwort, doradille ébène


Cite taxon page as 'WFO (2020): Asplenium platyneuron (L.) Britton, Sterns & Poggenb. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001110406. Accessed on: 07 Apr 2020'

General Information

Roots not proliferous. Stems short-creeping, unbranched; scales dark brown to black throughout, narrowly linear-deltate, 2--4 × 0.3--0.6 mm, margins entire. Leaves ± dimorphic; fertile leaves taller and more erect than sterile leaves. Petiole reddish brown throughout, lustrous, 1--10 cm, 1/4--1/3 length of blade; indument of dark brown to black, filiform scales at base. Blade lustrous, linear to narrowly oblanceolate, 1-pinnate throughout, 4--50 × 2--5(--7) cm, thin, glabrous, or occasionally sparsely pubescent; base gradually tapered; apex acute, not rooting. Rachis reddish or purplish brown throughout, lustrous, glabrous. Pinnae in 15--45 pairs, oblong to quadrangular; medial pinnae 1--2.5 × 0.3--0.5 cm; base with conspicuous acroscopic and sometimes basiscopic auricle, this overlapping rachis; margins crenate to serrulate, sometimes more deeply incised in robust specimens; apex acute to obtuse. Veins free, evident. Sori 1--12 pairs per pinna, on both basiscopic and acroscopic sides. Spores 64 per sporangium. 2 n = 72.

  • Provided by: [C].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    Morphology

    Terrestrial. Rhizome shortly creeping to suberect, with blackish brown scales. Fronds tufted, strongly erect, pinnate, lamina linear-elliptic to linear-oblanceolate, ± 240 x 26 mm, glabrous adaxially, subglabrous with minute, scattered scales abaxially; pinnae roughly rectangular, somewhat falcate and angled downwards, sessile, with enlarged acroscopic lobe, margins crenate to subentire; rachis black, glossy; stipe blackish brown, glabrous at maturity. Sporangia in linear, indusiate sori borne in 7-18 pairs set at 45° angle to midrib.

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

    Rhizome suberect. Fronds to 24 cm, erect, tufted, stipe initially scaled, lamina linear, 1-pinnate, with up to 50 pinna pairs, pinnae oblong, auriculate acroscopically, margins irregularly crenate-serrate, sparsely scaled beneath. Sori to 14 pairs per pinna, indusium erose.

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

    Rhizome erect to suberect, c. 4 mm in diameter, set with dark brown to black, lanceolate-attenuate, subentire rhizome-scales c. 3 mm long. Fronds tufted, firmly membranous, not gemmiferous; stipe atrocastaneous, nitid, less than V6 lamina length, set at first with hair-like scales; lamina linear, c. 240 x 26 mm, pinnate, lower pinnae decrescent; pinnae in up to 50 pairs, subsessile, set at 90 or more to rhachis; midpinnae linear to oblong or lanceolate, auriculate acroscopically, base cordate, overlapping rhachis, margin somewhat irregularly crenate-serrate, incisions sometimes alternating deeper and shallower, upper surface glabrous, lower surface set with minute pale or dark-tipped scales; venation obscure. Sori up to 18 per pinna, c. 2 mm long; indusium membranous, erose, c. 0.5 mm broad.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Habitat

    Mesic Grassland. Forest margins, among rocks and boulder bases in scrub and open grassland.

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

    Forest margins and stream banks, 150-800 m.

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

    Forest floors, streambanks and shady ledges, 1200-2200 m.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Distribution

    Langeberg to Mpumalanga and N America.

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

    Cape Province, Transkei, Natal, Lesotho and Transvaal. Also North America and Jamaica.

  • Provided by: [B].e-Flora of South Africa
    • Source: [
    • 5
    • ]. 

    Other Local Names

    NameLanguageCountry
    Ebony spleenwort, doradille ébène

      Bibliography

     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
    Flora of North America @ efloras.org
    http://www.efloras.org/flora_page.aspx?flora_id=1
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Flora of North America Association
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • D CC0 1.0 Universal (CC0 1.0).