Asplenium platyneuron (L.) Britton, Sterns & Poggenb.
  • Prelim. Cat. : 73 (1888)
  • Ebony spleenwort, doradille ébène


Cite taxon page as 'WFO (2022): Asplenium platyneuron (L.) Britton, Sterns & Poggenb. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0001110406. Accessed on: 29 Nov 2022'

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: [D].Flora of North America @ efloras.org
    • Source: [
    • 1
    • ]. 

    Rhizome 2–3.5 mm thick, the few linear-subulate black scales 2.5–4 mm; lvs subdimorphic, 5–50 cm, with dark brown petiole and rachis; sterile blades spreading, 5–10 cm, very shortly petiolate, pinnate, with 15–22 pairs of sessile, alternate, crowded, oblong pinnae 7–10 × 3.5–4.5 mm, these rounded and remotely serrulate, tending to be auriculate at the upper base; fertile lvs few, erect, to 4.5 dm × 6 cm, short-petiolate, the blade linear-oblong, acute, narrowed basally, pinnate, the 30–50 pairs of alternate pinnae less crowded, more linear-oblong (except the reduced, more deltoid lowermost ones), to 3.5 cm × 6 mm, more prominently auriculate at the upper base and sometimes at the lower base as well, mostly serrate, seldom more deeply cleft; 2n=72. Woods, banks, and rocks in circumneutral soil; Que. and Ont. to se. Minn., Kans., and Colo., s. to Fla., Tex., and Ariz.

  • Provided by: [C].Manual of Vascular Plants of Northeastern US and Canada
    • Source: [
    • 2
    • ]. 

    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
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    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
    http://www.worldfloraonline.org/organisation/Aspleniaceae
    World Flora Online Data. 2021.
    • 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
    Manual of Vascular Plants of Northeastern US and Canada
    https://www.nybg.org/
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    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.
    • D Flora of North America Association
    Pteridaceae
    http://www.worldfloraonline.org/organisation/Pteridaceae
    World Flora Online Data. 2022.
    • E CC0 1.0 Universal (CC0 1.0).
    Hymenophyllaceae
    http://www.worldfloraonline.org/organisation/Hymenophyllaceae
    World Flora Online Data. 2021.
    • F CC0 1.0 Universal (CC0 1.0).
    World Flora Online Consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2017.
    • G CC0 1.0 Universal (CC0 1.0).