View source for Polystichum braunii

{{Treatment/ID
|accepted_name=Polystichum braunii
|accepted_authority=(Spenner) Fée
|publications={{Treatment/Publication
|place=5: 278. 1852
|year=1852
}}
|common_names=Braun's holly fern;polystic de braun
|basionyms={{Treatment/ID/Basionym
|name=Aspidium braunii
|authority=Spenner
|rank=species
|publication_title=Fl. Friburg.
|publication_place=1: 9, plate 2. 1825
}}
|synonyms={{Treatment/ID/Synonym
|name=Polystichum braunii subsp. purshii
|authority=(Fernald) Calder & Roy L. Taylor
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Polystichum braunii var. purshii
|authority=Fernald
|rank=variety
}}
|hierarchy=Dryopteridaceae;Polystichum;Polystichum braunii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Dryopteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Polystichum]]</div><div class="higher-taxon"><small>species</small>[[Polystichum braunii]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>erect. <b>Leaves</b> monomorphic, arching, 2–10 dm; bulblets absent. <b>Petiole</b> 1/8–1/6 length of leaf, densely scaly; scales light brown, gradually diminishing in size distally. <b>Blade</b> broadly lanceolate, 2-pinnate; base narrowed. <b>Pinnae</b> oblong-lanceolate or falcate, proximal pinnae ± rectangular, not overlapping, in 1 plane, 2–10 cm; base oblique except proximal 3–4 pinnae, where auricles not developed; apex acute, subapical and apical teeth same size; microscales filiform to linear, lacking projections, dense abaxially, sparse adaxially. <b>Pinnules</b> ± stalked, short-falcate to oblique-rhombic, acroscopic auricle well developed on proximal pinnules; margins dentate, with slender bristle tips; apex broadly acute. <b>Indusia</b> ciliate. <b>Spores</b> brown. <b>2n</b> = 164.</span><!--

-->{{Treatment/Body
|habitat=Moist places in boreal forests, interior moist forests
|elevation=0–300 m
|distribution=St. Pierre and Miquelon;B.C.;N.B.;Nfld.;N.S.;Ont.;Que.;Yukon;Alaska;Conn.;Idaho;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;Vt.;Wis.;Eurasia.
|discussion=<p>Because no diploid ancestors have been found, <i>Polystichum braunii</i> is thought to be an ancient tetraploid. Its sterile hybrid with <i>P. acrostichoides</i>, P. × potteri, is discussed under <i>P. acrostichoides</i>. <i>Polystichum braunii</i> × lonchitis has been reported from southeast Alaska (S. L. Welsh 1974). This hybrid has been cytologically confirmed in Europe and named P. × meyeri Sleep & Reichstein (A. Sleep and T. Reichstein 1967). It has narrower and less divided leaves than <i>P. braunii</i> and poorly developed auricles. <i>Polystichum braunii</i> × lonchitis was described by J. Ewan (1944), but the type (from British Columbia) is <i>P. braunii</i> × munitum (A. Sleep and T. Reichstein 1967). This latter hybrid is the postulated progenitor of <i>P. setigerum</i> (D. H. Wagner 1979). North American <i>P. braunii</i> has been segregated as <i></i>var.<i> purshii</i> Fernald, distinguished from European populations (var. braunii) by having broader microscales.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Polystichum braunii
|authority=(Spenner) Fée
|rank=species
|parent rank=genus
|synonyms=Polystichum braunii subsp. purshii;Polystichum braunii var. purshii
|basionyms=Aspidium braunii
|family=Dryopteridaceae
|habitat=Moist places in boreal forests, interior moist forests
|elevation=0–300 m
|distribution=St. Pierre and Miquelon;B.C.;N.B.;Nfld.;N.S.;Ont.;Que.;Yukon;Alaska;Conn.;Idaho;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;Vt.;Wis.;Eurasia.
|reference=None
|publication title=
|publication year=1852
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_248.xml
|genus=Polystichum
|species=Polystichum braunii
}}<!--

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