View source for Gymnocarpium appalachianum

{{Treatment/ID
|accepted_name=Gymnocarpium appalachianum
|accepted_authority=Pryer & Haufler
|publications={{Treatment/Publication
|title=Syst. Bot.
|place=18: 161. 1993
|year=1993
}}
|common_names=Appalachian oak fern
|basionyms=
|synonyms=
|hierarchy=Dryopteridaceae;Gymnocarpium;Gymnocarpium appalachianum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dryopteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Gymnocarpium]]</div><div class="higher-taxon"><small>species</small>[[Gymnocarpium appalachianum]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>0.5–1.5 mm diam.; scales 1.5–3 mm. <b>Fertile</b> leaves usually 10–32 cm. <b>Petiole</b> 6–20 cm, with sparse glandular hairs distally; scales 2–5 mm. <b>Blade</b> broadly deltate, 2–3-pinnate-pinnatifid, 4–12 cm, lax and delicate, abaxial surface and rachis glabrous or with occasional glandular hairs, adaxial surface glabrous. <b>Pinna</b> apex entire, rounded. <b>Proximal</b> pinnae 3–10 cm, ± perpendicular to rachis, with basiscopic pinnules ± perpendicular to costa; basal basiscopic pinnules stalked or sessile, pinnate-pinnatifid or pinnatifid, if sessile then with basal basiscopic pinnulet (division of pinnule) always shorter than adjacent pinnulet; 2d basal basiscopic pinnule infrequently stalked, if sessile then with basal basiscopic pinnulet shorter than adjacent pinnulet; basal acroscopic pinnule occasionally stalked, if sessile then with basal basiscopic pinnulet shorter than adjacent pinnulet. <b>Pinnae</b> of 2d pair usually stalked, if sessile then with basal basiscopic pinnule shorter than adjacent pinnule and equaling basal acroscopic pinnule; basal acroscopic pinnule shorter than adjacent pinnule, often with entire, rounded apex. <b>Pinnae</b> of 3d pair usually sessile with basal basiscopic pinnule shorter than adjacent pinnule and equaling or shorter than basal acroscopic pinnule; basal acroscopic pinnule equaling or shorter than adjacent pinnule. <b>Ultimate</b> segments of proximal pinnae oblong, entire to crenate, apex entire, rounded. <b>Spores</b> 27–31 µm. <b>2n</b> = 80.</span><!--

-->{{Treatment/Body
|habitat=Maple-birch-hemlock (Acer - Betula - Tsuga) woods on mountain slopes and summits, on moist sandstone or talus slopes with cold air seepage (algific)
|elevation=200–1400 m
|distribution=Md.;N.C.;Ohio;Pa.;Va.;W.Va.
|discussion=<p>Gymnocarpium appalachianum, restricted to the Appalachian region, is a very local endemic.</p><!--
--><p>Of conservation concern.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Gymnocarpium appalachianum
|author=
|authority=Pryer & Haufler
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Dryopteridaceae
|habitat=Maple-birch-hemlock (Acer - Betula - Tsuga) woods on mountain slopes and summits, on moist sandstone or talus slopes with cold air seepage (algific)
|elevation=200–1400 m
|distribution=Md.;N.C.;Ohio;Pa.;Va.;W.Va.
|reference=None
|publication title=Syst. Bot.
|publication year=1993
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_708.xml
|genus=Gymnocarpium
|species=Gymnocarpium appalachianum
}}<!--

-->[[Category:Treatment]][[Category:Gymnocarpium]]