View source for Polystichum imbricans

{{Treatment/ID
|accepted_name=Polystichum imbricans
|accepted_authority=(D. C. Eaton) D. H. Wagner
|publications={{Treatment/Publication
|title=Pteridologia
|place=1: 50. 1979
|year=1979
}}
|common_names=Imbricate sword fern
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Aspidium munitum var. imbricans
|authority=D. C. Eaton
|rank=variety
|publication_title=Ferns N. Amer.
|publication_place=1: 188, plate 25, fig. 3. 1878
}}
|synonyms={{Treatment/ID/Synonym
|name=Polystichum munitum subsp. imbricans
|authority=(D. C. Eaton) Munz
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Polystichum munitum var. imbricans
|authority=(D. C. Eaton) Maxon
|rank=variety
}}
|hierarchy=Dryopteridaceae;Polystichum;Polystichum imbricans
|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 imbricans]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>ascending to erect. <b>Leaves</b> erect to arching back at tip, 2–8 dm; bulblets absent. <b>Petiole</b> 1/4–1/3 length of leaf; scales abruptly diminishing in size distally and falling off early but retaining conspicuous tuft of brown scales at base. <b>Blade</b> linear-lanceolate to linear, 1-pinnate, base not or slightly narrowed. <b>Pinnae</b> oblong, slenderly lanceolate, or falcate, usually overlapping, in 1 plane or twisted out of plane of blade, 2–4 cm; base oblique, auricles well developed; margins serrulate-spiny with teeth ascending; apex cuspidate or apiculate with subapical teeth smaller than apical tooth; microscales lanceolate to linear with straight or sharply angular projections, sparse, on abaxial surface only. <b>Indusia</b> entire to sharply dentate. <b>Spores</b> dark brown.</span><!--

-->{{Treatment/Body
|distribution=B.C.;Calif.;Oreg.;Wash.;only in the flora.
|discussion=<p><i>Polystichum imbricans</i> is one of the postulated ancestors of two allopolyploids, <i>P. californicum</i> and <i>P. scopulinum</i> (D. H. Wagner 1979). Relationships to <i>P. munitum</i> are discussed under that species.</p><!--
--><p>Subspecies 2.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Pinnae oblong, less than 5 times longer than wide, adaxial surfaces facing upward and twisted out of plane of blade; leaves stiffly erect to tip; at base of boulders or in cliff crevices in exposed sites; California to British Columbia.
|[[Polystichum imbricans subsp. imbricans|Polystichum imbricans subsp. imbricans]]
|-id=key-0-1
|1
|Pinnae narrowly lanceolate, more than 5 times longer than wide, generally in 1 plane; leaf tips arching back; on forest floor in shade; only in California.
|[[Polystichum imbricans subsp. curtum|Polystichum imbricans subsp. curtum]]
|}
</div></div><!--

-->{{#Taxon:
name=Polystichum imbricans
|authority=(D. C. Eaton) D. H. Wagner
|rank=species
|parent rank=genus
|synonyms=Polystichum munitum subsp. imbricans;Polystichum munitum var. imbricans
|basionyms=Aspidium munitum var. imbricans
|family=Dryopteridaceae
|distribution=B.C.;Calif.;Oreg.;Wash.;only in the flora.
|reference=None
|publication title=Pteridologia
|publication year=1979
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_319.xml
|genus=Polystichum
|species=Polystichum imbricans
}}<!--

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[[Category:Treatment]]
[[Category:Polystichum]]
[[Category:Revised Since Print]]