View source for Calliergon richardsonii

{{Treatment/ID
|accepted_name=Calliergon richardsonii
|accepted_authority=(Mitten) Kindberg
|publications={{Treatment/Publication
|title=Eur. N. Amer. Bryin.
|place=1: 80. 1897
|year=1897
}}
|basionyms={{Treatment/ID/Synonym
|name=Stereodon richardsonii
|authority=Mitten
}}
|synonyms={{Treatment/ID/Synonym
|name=Calliergon macounii
|authority=Karczmarz
}} {{Treatment/ID/Synonym
|name=C. obtusifolium
|authority=Karczmarz
}} {{Treatment/ID/Synonym
|name=C. subgiganteum
|authority=Kindberg
}}
|hierarchy=Calliergonaceae;Calliergon;Calliergon richardsonii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Calliergonaceae]]</div><div class="higher-taxon"><small>genus</small>[[Calliergon]]</div><div class="higher-taxon"><small>species</small>[[Calliergon richardsonii]]</div></div>
|volume=Volume 28
|mention_page=page 391, 393
|treatment_page=page 392
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>medium-sized to large, brownish, yellow, or sometimes green. <b>Stems</b> regularly radially pinnate; axillary hair apical cell short- to long-linear. <b>Stem</b> leaves rounded ovate, broadly rounded ovate, or rounded ovate-cordate; costa single, usually branched or distally 2-fid, 53–119 µm wide near base, 1/2–9/10 leaf length; alar region sharply delimited, triangular or usually oblong, from margins 60–80% distance to costa; medial laminal cells 50–133 × (7–)8–13(–14) µm. <b>Sexual</b> condition autoicous. <b>Spores</b> 17–31 µm.</span><!--

-->{{Treatment/Body
|habitat=Wet, ± mineral-and nutrient-rich fens, ditches, shores, floating or submerged in lakes
|elevation=low to high elevations
|distribution=Greenland;Alta.;Man.;N.B.;Nfld. and Labr.;N.W.T.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Maine;Mich.;Minn.;Wyo.;n Eurasia;Pacific Islands (New Zealand).
|discussion=<p><i>Calliergon richardsonii</i> is easily separated from other members of the genus by its comparatively short, usually branched or 2-fid stem leaf costa. The species has smaller alar regions than <i>C. cordifolium</i> and <i>C. giganteum</i>, which aids in separating it from occasional specimens of the other two that have some leaves with a slightly shorter costa than usual. Due to somewhat less spreading branch leaves and a less regular branching pattern, the plants do not become spruce treelike as in <i>C. giganteum</i>. Differences between 5. <i>C. megalophyllum</i> and <i>C. richardsonii</i> are provided with the former. Molecular evidence (M. Stech, pers. comm.) suggests that <i>C. richardsonii</i> consists of two entities, the status of which is currently being investigated.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Calliergon richardsonii
|author=
|authority=(Mitten) Kindberg
|rank=species
|parent rank=genus
|synonyms=Calliergon macounii;C. obtusifolium;C. subgiganteum
|basionyms=Stereodon richardsonii
|family=Calliergonaceae
|habitat=Wet, ± mineral-and nutrient-rich fens, ditches, shores, floating or submerged in lakes
|elevation=low to high elevations
|distribution=Greenland;Alta.;Man.;N.B.;Nfld. and Labr.;N.W.T.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Maine;Mich.;Minn.;Wyo.;n Eurasia;Pacific Islands (New Zealand).
|reference=None
|publication title=Eur. N. Amer. Bryin.
|publication year=1897
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V28/V28_616.xml
|genus=Calliergon
|species=Calliergon richardsonii
}}<!--

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