View source for Polypodium virginianum

{{Treatment/ID
|accepted_name=Polypodium virginianum
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1085. 1753
|year=1753
}}
|common_names=Rock polypody;tripes-de-roches;polypode de virginie
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Polypodium vinlandicum
|authority=A. Löve & D. Löve
|rank=species
}} {{Treatment/ID/Synonym
|name=Polypodium vulgare var. americanum
|authority=Hooker
|rank=variety
}} {{Treatment/ID/Synonym
|name=Polypodium vulgare var. virginianum
|authority=(Linnaeus) D. C. Eaton
|rank=variety
}}
|hierarchy=Polypodiaceae;Polypodium;Polypodium virginianum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polypodiaceae]]</div><div class="higher-taxon"><small>genus</small>[[Polypodium]]</div><div class="higher-taxon"><small>species</small>[[Polypodium virginianum]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>often whitish pruinose, slender, to 6 mm diam., acrid-tasting; scales weakly bicolored, lanceolate, contorted distally, base and margins light brown, sometimes with dark central stripe, margins denticulate. <b>Leaves</b> to 40 cm. <b>Petiole</b> slender, to 2 mm diam. <b>Blade</b> oblong to narrowly lanceolate, pinnatifid, usually widest near middle, occasionally at or near base, to 7 cm wide, somewhat leathery; rachis sparsely scaly to glabrescent abaxially, glabrous adaxially; scales lanceolate-ovate, usually more than 6 cells wide. <b>Segments</b> oblong, less than 8 mm wide; margins entire to crenulate; apex rounded to broadly acute; midrib glabrous adaxially. <b>Venation</b> free. <b>Sori</b> midway between margin and midrib to nearly marginal, less than 3 mm diam., circular when immature. <b>Sporangiasters</b> present, usually less than 40 per sorus, heads covered with glandular hairs. <b>Spores</b> more than 52 µm, tuberculate, surface projections more than 3 µm tall. <b>2n</b> = 148.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–fall.
|habitat=Cliffs and rocky slopes, on a variety of substrates
|elevation=0–1800 m
|distribution=St. Pierre and Miquelon;Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Conn.;Del.;D.C.;Ga.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Vt.;Va.;W.Va.;Wis.
|discussion=<p>Traditionally, two cytotypes have been recognized within <i>Polypodium virginianum</i> (I. Manton and M. Shivas 1953). Recent research has demonstrated that the tetraploid cytotype, which properly bears the name <i>P. virginianum</i> (R. Cranfill and D. M. Britton 1983), is an allopolyploid produced by hybridization between the diploid cytotype (here called <i>P. appalachianum</i>) and <i>P. sibiricum</i> (C. H. Haufler and M. D. Windham 1991; C. H. Haufler and Wang Z. R. 1991). Although sometimes similar to its diploid parents in overall leaf morphology, <i>P. virginianum</i> has consistently larger spores, typically more than 52 µm (see additional comments under <i>P. appalachianum</i> and <i>P. sibiricum</i>). Frequent hybridizations between <i>P. virginianum</i> and <i>P. appalachianum</i> form morphologically intermediate, triploid individuals with misshapen spores. Sterile triploids also result from hybridization between <i>P. virginianum</i> and <i>P. sibiricum</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polypodium virginianum
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Polypodium vinlandicum;Polypodium vulgare var. americanum;Polypodium vulgare var. virginianum
|basionyms=
|family=Polypodiaceae
|phenology=Sporulating summer–fall.
|habitat=Cliffs and rocky slopes, on a variety of substrates
|elevation=0–1800 m
|distribution=St. Pierre and Miquelon;Alta.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Ala.;Ark.;Conn.;Del.;D.C.;Ga.;Ill.;Ind.;Iowa;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Vt.;Va.;W.Va.;Wis.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_572.xml
|genus=Polypodium
|species=Polypodium virginianum
}}<!--

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