View source for Woodsia alpina

{{Treatment/ID
|accepted_name=Woodsia alpina
|accepted_authority=(Bolton) Gray
|publications={{Treatment/Publication
|title=Nat. Arr. Brit. Pl.
|place=2: 17. 1822
|year=1822
}}
|common_names=Alpine cliff fern;woodsie alpine
|basionyms={{Treatment/ID/Basionym
|name=Acrostichum alpinum
|authority=Bolton
|rank=species
|publication_title=Fil. Brit.
|publication_place=2: 76, plate 42. 1790
}}
|synonyms={{Treatment/ID/Synonym
|name=Woodsia alpina var. bellii
|authority=Lawson
|rank=variety
}} {{Treatment/ID/Synonym
|name=Woodsia bellii
|authority=(Liljeblad) R. Brown
|rank=species
}} {{Treatment/ID/Synonym
|name=Woodsia hyperborea
|authority=(Linnaeus) R. Brown
|rank=species
}} {{Treatment/ID/Synonym
|name=Woodsia ilvensis var. alpina
|authority=(Bolton) Watt
|rank=variety
}}
|hierarchy=Dryopteridaceae;Woodsia;Woodsia alpina
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dryopteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Woodsia]]</div><div class="higher-taxon"><small>species</small>[[Woodsia alpina]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>compact, erect to ascending, with cluster of persistent petiole bases of ± equal length; scales uniformly brown, lanceolate. <b>Leaves</b> 2.5–20 × 0.5–2.5 cm. <b>Petiole</b> reddish brown or dark purple when mature, articulate above base at swollen node, relatively brittle and easily shattered. <b>Blade</b> linear to narrowly lanceolate, usually pinnate-pinnatifid proximally, lacking glands, never viscid; rachis with widely scattered hairs and scales. <b>Pinnae</b> ovate-lanceolate to deltate, longer than wide, abruptly tapered to a rounded or broadly acute apex; largest pinnae with 1–3 pairs of pinnules; abaxial surface with isolated hairs and linear scales, adaxial surface glabrous. <b>Pinnules</b> entire or broadly crenate; margins nonlustrous, thin, with occasional isolated cilia, lacking translucent projections. <b>Vein</b> tips often enlarged to form whitish hydathodes visible adaxially. <b>Indusia</b> of narrow, hairlike segments, these uniseriate throughout, composed of cells many times longer than wide, usually surpassing mature sporangia. <b>Spores</b> averaging 46–53 µm.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–early fall.
|habitat=Crevices and ledges on cliffs (occasionally on rocky slopes), mostly slaty and calcareous rocks
|elevation=0–1500 m
|distribution=Greenland;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Maine;Mich.;Minn.;N.H.;N.Y.;Vt.;n Eurasia.
|discussion=<p>Isozyme studies confirm the longstanding hypothesis that <i>Woodsia alpina</i> is an allotetraploid derived from hybridization between <i>W. glabella</i> and <i>W. ilvensis</i> (see reticulogram). Considerable disagreement exists concerning the chromosome number of <i>W. alpina</i>, but 2n = 160 seems most likely, given the numbers reported for the two parental species. Hybrids between <i>W. alpina</i> and <i>W. ilvensis</i> have been reported from both Europe and North America. These morphologically intermediate triploids with malformed spores have been called W. × gracilis (Lawson) Butters.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Woodsia alpina
|authority=(Bolton) Gray
|rank=species
|parent rank=genus
|synonyms=Woodsia alpina var. bellii;Woodsia bellii;Woodsia hyperborea;Woodsia ilvensis var. alpina
|basionyms=Acrostichum alpinum
|family=Dryopteridaceae
|phenology=Sporulating summer–early fall.
|habitat=Crevices and ledges on cliffs (occasionally on rocky slopes), mostly slaty and calcareous rocks
|elevation=0–1500 m
|distribution=Greenland;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Maine;Mich.;Minn.;N.H.;N.Y.;Vt.;n Eurasia.
|reference=None
|publication title=Nat. Arr. Brit. Pl.
|publication year=1822
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_48.xml
|genus=Woodsia
|species=Woodsia alpina
}}<!--

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[[Category:Treatment]]
[[Category:Woodsia]]
[[Category:Revised Since Print]]