View source for Asplenium adiantum-nigrum

{{Treatment/ID
|accepted_name=Asplenium adiantum-nigrum
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1081. 1753
|year=1753
}}
|common_names=Black spleenwort
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Asplenium andrewsii
|authority=A. Nelson
|rank=species
}} {{Treatment/ID/Synonym
|name=Asplenium chihuahuense
|authority=J. G. Baker
|rank=species
}} {{Treatment/ID/Synonym
|name=Asplenium dubiosum
|authority=Davenport
|rank=species
}}
|hierarchy=Aspleniaceae;Asplenium;Asplenium adiantum-nigrum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Aspleniaceae]]</div><div class="higher-taxon"><small>genus</small>[[Asplenium]]</div><div class="higher-taxon"><small>species</small>[[Asplenium adiantum-nigrum]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>not proliferous. <b>Stems</b> ascending or short-creeping, infrequently branched; scales dark brown to blackish throughout, narrowly deltate, 2–4(–5) × 0.2–0.5 mm, margins entire or shallowly denticulate to serrulate. <b>Leaves</b> monomorphic. <b>Petiole</b> dark reddish brown proximally, often fading to green distally, lustrous, 2–20 cm, 2/3–2 times length of blade; indument of black filiform scales and minute hairs. <b>Blade</b> deltate, 2–3-pinnate, 2.5–10 × 2–6.5 cm, thick, hairs dark, scattered, minute; base truncate; apex acute to acuminate, not rooting. <b>Rachis</b> greenish throughout or sometimes reddish brown proximally, lustrous, sparsely pubescent. <b>Pinnae</b> in 4–10 pairs, deltate to lanceolate; most proximal (largest) pinnae 1.5–4 × 1–2.5 cm; base obliquely obtuse; segment margins coarsely incised; apex acute. <b>Veins</b> free, evident. <b>Sori</b> 1–numerous pairs per pinna [1–6 pairs per segment], on both basiscopic and acroscopic sides. <b>Spores</b> 64 per sporangium. <b>2n</b> = 144.</span><!--

-->{{Treatment/Body
|habitat=Cliffs
|elevation=1675–2300 m
|distribution=Ariz.;Colo.;Utah;Eurasia;Africa.
|discussion=<p><i>Asplenium adiantum-nigrum</i> is principally a Eurasian species and occurs extremely rarely in North America (see M. G. Shivas 1969 and M. D. Windham 1983 for a discussion of the conspecificity of Western Hemisphere and Eastern Hemisphere material). It is an allotetraploid derived from hybridization of two European taxa, A. cuneifolium Viviani and A. onopteris Linnaeus (M. G. Shivas 1969). Hybrids involving <i>A. adiantum-nigrum</i> and other <i>Asplenium</i> species occur in Europe but are unknown in North America.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Asplenium adiantum-nigrum
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Asplenium andrewsii;Asplenium chihuahuense;Asplenium dubiosum
|basionyms=
|family=Aspleniaceae
|habitat=Cliffs
|elevation=1675–2300 m
|distribution=Ariz.;Colo.;Utah;Eurasia;Africa.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_337.xml
|genus=Asplenium
|species=Asplenium adiantum-nigrum
}}<!--

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