View source for Woodsia ilvensis

{{Treatment/ID
|accepted_name=Woodsia ilvensis
|accepted_authority=(Linnaeus) R. Brown
|publications={{Treatment/Publication
|title=Trans. Linn. Soc. London, Bot.
|place=11: 173. 1813
|year=1813
}}
|common_names=Rusty cliff fern;woodsie de l'île d'Elbe
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Acrostichum ilvense
|authority=Linnaeus
|rank=species
|publication_title=Sp. Pl.
|publication_place=2: 1071. 1753
}}
|synonyms=
|hierarchy=Dryopteridaceae;Woodsia;Woodsia ilvensis
|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 ilvensis]]</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 abundant persistent petiole bases of ± equal length; scales uniformly brown, lanceolate. <b>Leaves</b> 4.5–25 × 1.2–3.5 cm. <b>Petiole</b> usually brown or dark purple when mature, articulate above base at swollen node, relatively brittle and easily shattered. <b>Blade</b> narrowly lanceolate, usually 2-pinnate proximally, lacking glands, never viscid; rachis usually with abundant 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 4–9 pairs of pinnules; abaxial surface with mixture of hairs and linear-lanceolate scales, adaxial surface with multicellular hairs concentrated along midrib. <b>Pinnules</b> entire or crenate, rarely shallowly lobed; margins nonlustrous, thin, ciliate with multicellular hairs, lacking translucent projections. <b>Vein</b> tips frequently 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 39–46 µm. <b>2n</b> = 82.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–early fall.
|habitat=Cliffs and rocky slopes, found on variety of substrates including serpentine
|elevation=0–1500 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;Que.;Sask.;Yukon;Alaska;Conn.;Ill.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.;n Eurasia.
|discussion=<p>Although generally separable by the characters given in the key, shade forms of <i>Woodsia ilvensis</i> with a reduced number of scales and hairs are occasionally misidentified as <i>W. alpina</i>. The morphologic distinctions between these species are further blurred by natural hybridization, which produces the intermediate triploid known as W. × gracilis. Some of the best characters for distinguishing these taxa are spore size and morphology. Spores average less than 46 µm in <i>W. ilvensis</i>, more than 46 µm in <i>W. alpina</i>, and are malformed and abortive in W. × gracilis. <i>Woodsia ilvensis</i> also hybridizes with <i>W. oregana </i>subsp.<i> cathcartiana</i> to form the sterile triploid W. × abbeae (F. S. Wagner 1987).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Woodsia ilvensis
|authority=(Linnaeus) R. Brown
|rank=species
|parent rank=genus
|synonyms=
|basionyms=Acrostichum ilvense
|family=Dryopteridaceae
|phenology=Sporulating summer–early fall.
|habitat=Cliffs and rocky slopes, found on variety of substrates including serpentine
|elevation=0–1500 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;Que.;Sask.;Yukon;Alaska;Conn.;Ill.;Iowa;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;Vt.;Va.;W.Va.;Wis.;n Eurasia.
|reference=None
|publication title=Trans. Linn. Soc. London, Bot.
|publication year=1813
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_349.xml
|genus=Woodsia
|species=Woodsia ilvensis
}}<!--

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