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
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|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-d0_s0" data-properties="stem orientation"><b>Stems </b>erect.</span> <span class="statement" id="st-d0_s1" data-properties="leaf architecture;leaf orientation;leaf some measurement"><b>Leaves </b>monomorphic, arching, 2–10 dm;</span> <span class="statement" id="st-d0_s2" data-properties="bulblet presence">bulblets absent.</span> <span class="statement" id="st-d0_s3" data-properties="petiole length;petiole architecture or pubescence"><b>Petiole </b>1/8–1/6 length of leaf, densely scaly;</span> <span class="statement" id="st-d0_s4" data-properties="scale coloration;scale size">scales light-brown, gradually diminishing in size distally.</span> <span class="statement" id="st-d0_s5" data-properties="blade shape;blade architecture or shape"><b>Blade </b>broadly lanceolate, 2-pinnate;</span> <span class="statement" id="st-d0_s6" data-properties="base shape">base narrowed.</span> <span class="statement" id="st-d0_s7" data-properties="pinna shape;pinna shape;proximal pinna shape;proximal pinna arrangement;proximal pinna some measurement"><b>Pinnae </b>oblong-lanceolate or falcate, proximal pinnae ± rectangular, not overlapping, in 1 plane, 2–10 cm;</span> <span class="statement" id="st-d0_s8" data-properties="base orientation or shape;pinna position;pinna quantity;auricle development">base oblique except proximal 3–4 pinnae, where auricles not developed;</span> <span class="statement" id="st-d0_s9" data-properties="apex shape">apex acute, subapical and apical teeth same size;</span> <span class="statement" id="st-d0_s10" data-properties="microscale shape;projection quantity;projection density;projection count or density">microscales filiform to linear, lacking projections, dense abaxially, sparse adaxially.</span> <span class="statement" id="st-d0_s11" data-properties="pinnule architecture;pinnule shape;auricle orientation"><b>Pinnules </b>± stalked, short-falcate to oblique-rhombic, acroscopic auricle well developed on proximal pinnules;</span> <span class="statement" id="st-d0_s12" data-properties="margin architecture or shape">margins dentate, with slender bristle tips;</span> <span class="statement" id="st-d0_s13" data-properties="apex shape">apex broadly acute.</span> <span class="statement" id="st-d0_s14" data-properties="indusium architecture or pubescence or shape"><b>Indusia </b>ciliate.</span> <span class="statement" id="st-d0_s15" data-properties=""><b>Spores </b>brown.</span> <span class="statement" id="st-d0_s16" data-properties="spore coloration;2n chromosome quantity">2n = 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. and Labr. (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, Polystichum braunii is thought to be an ancient tetraploid. Its sterile hybrid with P. acrostichoides, P. × potteri, is discussed under P. acrostichoides. Polystichum braunii × 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 P. braunii and poorly developed auricles. Polystichum braunii × lonchitis was described by J. Ewan (1944), but the type (from British Columbia) is P. braunii × munitum (A. Sleep and T. Reichstein 1967). This latter hybrid is the postulated progenitor of P. setigerum (D. H. Wagner 1979). North American P. braunii has been segregated as var. purshii Fernald, distinguished from European populations (var. braunii) by having broader microscales.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#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. and Labr. (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=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V2/V2_248.xml
|genus=Polystichum
|species=Polystichum braunii
|2n chromosome quantity=164
|apex shape=acute;acute
|auricle development=not developed
|auricle orientation=acroscopic
|base orientation or shape=oblique
|base shape=narrowed
|blade architecture or shape=2-pinnate
|blade shape=lanceolate
|bulblet presence=absent
|indusium architecture or pubescence or shape=ciliate
|leaf architecture=monomorphic
|leaf orientation=arching
|leaf some measurement=2dm;10dm
|margin architecture or shape=dentate
|microscale shape=filiform;linear
|petiole architecture or pubescence=scaly
|petiole length=1/8 length of leaf;1/6 length of leaf
|pinna position=proximal
|pinna quantity=3;4
|pinna shape=falcate;oblong-lanceolate
|pinnule architecture=stalked
|pinnule shape=short-falcate;oblique-rhombic
|projection count or density=sparse
|projection density=dense
|projection quantity=lacking
|proximal pinna arrangement=not overlapping
|proximal pinna shape=rectangular
|proximal pinna some measurement=2cm;10cm
|scale coloration=light-brown
|scale size=diminishing
|spore coloration=brown
|stem orientation=erect
}}<!--

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