View source for Adiantum aleuticum

{{Treatment/ID
|accepted_name=Adiantum aleuticum
|accepted_authority=(Ruprecht) Paris
|publications={{Treatment/Publication
|title=Rhodora
|place=93: 112. 1991
|year=1991
}}
|common_names=Western maidenhair;Aleutian maidenhair;adiante des aléoutiennes
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Adiantum pedatum var. aleuticum
|authority=Ruprecht
|rank=variety
|publication_title=Distr. Crypt. Vasc. Ross.,
|publication_place=49. 1845
}}
|synonyms={{Treatment/ID/Synonym
|name=Adiantum boreale
|authority=C. Presl
|rank=species
}} {{Treatment/ID/Synonym
|name=Adiantum pedatum subsp. aleuticum
|authority=(Ruprecht) Calder & Roy L. Taylor
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Adiantum pedatum subsp. calderi
|authority=Cody
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Adiantum pedatum subsp. subpumilum
|authority=(W. H. Wagner) Lellinger
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Adiantum pedatum var. subpumilum
|authority=W. H. Wagner
|rank=variety
}}
|hierarchy=Pteridaceae;Adiantum;Adiantum aleuticum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Pteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Adiantum]]</div><div class="higher-taxon"><small>species</small>[[Adiantum aleuticum]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short-creeping or suberect; scales bronzy deep yellow, concolored, margins entire. <b>Leaves</b> lax-arching to stiffly erect or pendent, often densely clustered, 15–110 cm. <b>Petiole</b> 0.5–3 mm diam., glabrous, often glaucous. <b>Blade</b> fan-shaped to funnel-shaped, pseudopedate, 1-pinnate distally, 5–45 × 5–45 cm; proximal pinnae (1–)2–7-pinnate; rachis straight, glabrous, often with glaucous bloom. <b>Segment</b> stalks 0.2–0.9(–1.3) mm, dark color entering into segment base or not. <b>Ultimate</b> segments oblong, long-triangular, or occasionally reniform, ca. 2.5–4 times as long as broad; basiscopic margin straight to oblique, or occasionally excavate; acroscopic margin lobed, lobes separated by narrow to broad incisions 0.2–3 mm wide; apex acute to obtuse, obtuse apices divided into ± angular lobes separated by sinuses 0.6–4 mm deep, margins of lobes sharply denticulate. <b>False</b> indusia transversely oblong to crescent-shaped, 0.2–3.5(–6) mm, glabrous. <b>Spores</b> mostly 37–47 µm diam. <b>2n</b> = 58.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–fall.
|habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon)
|elevation=0–3200 m
|distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua.
|discussion=<p><i>Adiantum aleuticum</i> is disjunct in wet rock fissures at high elevations in Arizona, Colorado, Montana, <i>Nevada</i>, Utah, Wyoming, and Mexico in Chihuahua, and it is disjunct on serpentine in Newfoundland, Quebec, Maine, Maryland, Pennsylvania, and Vermont.</p><!--
--><p>Although the western maidenhair has traditionally been interpreted as an infraspecific variant of <i>Adiantum pedatum</i>, the two taxa are reproductively isolated and differ in an array of morphologic characteristics. Therefore, they are more appropriately considered separate species (C. A. Paris and M. D. Windham 1988). Morphologic differences between <i>A. pedatum</i> and <i>A. aleuticum</i> are subtle; the two may be separated, however, using characteristics in the key. <i>Adiantum aleuticum</i> occurs in a variety of habitats throughout its range, from moist, wooded ravines to stark serpentine barrens and from coastal cliffs to subalpine boulder fields. Although morphologic differences exist among populations in these diverse habitats, they are not consistent. Consequently, infraspecific taxa are not recognized here within <i>A. aleuticum</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Adiantum aleuticum
|authority=(Ruprecht) Paris
|rank=species
|parent rank=genus
|synonyms=Adiantum boreale;Adiantum pedatum subsp. aleuticum;Adiantum pedatum subsp. calderi;Adiantum pedatum subsp. subpumilum;Adiantum pedatum var. subpumilum
|basionyms=Adiantum pedatum var. aleuticum
|family=Pteridaceae
|phenology=Sporulating summer–fall.
|habitat=Wooded ravines, shaded banks, talus slopes, serpentine barrens, and coastal headlands (uncommon)
|elevation=0–3200 m
|distribution=Alta.;B.C.;Nfld. and Labr. (Nfld.);Que.;Alaska;Ariz.;Calif.;Colo.;Idaho;Maine;Md.;Mont.;Nev.;Oreg.;Pa.;Utah;Vt.;Wash.;Wyo.;Mexico in Chihuahua.
|reference=None
|publication title=Rhodora
|publication year=1991
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_517.xml
|genus=Adiantum
|species=Adiantum aleuticum
}}<!--

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