View source for Woodsia obtusa subsp. obtusa

{{Treatment/ID
|accepted_name=Woodsia obtusa subsp. obtusa
|accepted_authority=(Swartz) Torrey
|publications=
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Dryopteridaceae;Woodsia;Woodsia obtusa;Woodsia obtusa subsp. obtusa
|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 obtusa]]</div><div class="higher-taxon"><small>subspecies</small>[[Woodsia obtusa subsp. obtusa]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>compact to short-creeping, individual branches usually 5–10 mm diam. <b>Blade</b> coarsely cut and evidently 2-pinnate. <b>Proximal</b> pinnules of lower pinnae usually shallowly lobed or merely dentate. <b>Spores</b> averaging 42–47 µm. <b>2n</b> = 152.</span><!--

-->{{Treatment/Body
|phenology=Sporulating summer–fall.
|habitat=Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates including both granite and limestone
|elevation=0–1000 m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.
|discussion=<p>D. F. M. Brown (1964) hypothesized that tetraploid <i>Woodsia obtusa</i> might be an autopolyploid derived from <i>W. oregana</i>. Recent isozyme and spore ornamentation studies indicate, however, that these species are not closely related, and the discovery of a diploid cytotype of <i>W. obtusa</i> suggests a different (albeit autopolyploid) origin for this taxon (M. D. Windham 1993). Tetraploid <i></i>subsp.<i> obtusa</i> crosses with diploid <i></i>subsp.<i> occidentalis</i>; the resulting triploids are sterile and have malformed spores. It also hybridizes with <i>W. oregana </i>subsp.<i> cathcartiana</i> to form the sterile tetraploid hybrid known as W. × kansana Brooks.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Woodsia obtusa subsp. obtusa
|authority=(Swartz) Torrey
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=
|family=Dryopteridaceae
|phenology=Sporulating summer–fall.
|habitat=Cliffs and rocky slopes (rarely terrestrial), found on a variety of substrates including both granite and limestone
|elevation=0–1000 m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.
|reference=None
|publication title=
|publication year=
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_182.xml
|genus=Woodsia
|species=Woodsia obtusa
|subspecies=Woodsia obtusa subsp. obtusa
}}<!--

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[[Category:Treatment]]
[[Category:Woodsia obtusa]]
[[Category:Revised Since Print]]
[[Category:Revision Pending]]