View source for Sarmentypnum exannulatum

{{Treatment/ID
|accepted_name=Sarmentypnum exannulatum
|accepted_authority=(Schimper) Hedenas
|publications={{Treatment/Publication
|title=J. Hattori Bot. Lab.
|place=100: 132. 2006
|year=2006
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Selected by author to be illustrated
}}
|basionyms={{Treatment/ID/Basionym
|name=Hypnum exannulatum
|authority=Schimper
|publication_title=in P. Bruch and W. P. Schimper, Bryol. Europ.
|publication_place=6: 110, plate 603. 1854
}}
|synonyms={{Treatment/ID/Synonym
|name=Drepanocladus exannulatus
|authority=(Schimper) Warnstorf
}} {{Treatment/ID/Synonym
|name=D. exannulatus var. purpurascens
|authority=(Schimper) Herzog
}} {{Treatment/ID/Synonym
|name=D. exannulatus var. rotae
|authority=(De Notaris) Loeske
}} {{Treatment/ID/Synonym
|name=Warnstorfia exannulata
|authority=unknown
}} {{Treatment/ID/Synonym
|name=W. exannulata var. purpurascens
|authority=(Schimper) Tuomikoski & T. J. Koponen
}}
|hierarchy=Calliergonaceae;Sarmentypnum;Sarmentypnum exannulatum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Calliergonaceae]]</div><div class="higher-taxon"><small>genus</small>[[Sarmentypnum]]</div><div class="higher-taxon"><small>species</small>[[Sarmentypnum exannulatum]]</div></div>
|volume=Volume 28
|mention_page=page 398, 399, 401, 402
|treatment_page=page 400
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>medium-sized, green, yellowish, or with red secondary pigment. <b>Stems</b> with branch and shoot apices not pencil-like; epidermal cells usually widened to form partial hyalodermis; axillary hair distal cells 1–4, hyaline when young. <b>Stem</b> leaves ovate or ovate-triangular, gradually narrowed to apex, falcate or strongly so, sometimes straight, concave; base not decurrent; margins distinctly denticulate proximally, distally, or both; apex acuminate, sometimes furrowed but not strongly so; costa ending 3/5 to nearly entire leaf length; alar region from margins to costa or nearly so; marginal cells at widest part of leaf often differentiated from medial cells.</span><!--

-->{{Treatment/Body
|habitat=Intermediately mineral-rich fens, around springs, late snow beds, submerged in lakes
|elevation=low to high elevations (0-4200 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nev.;N.H.;N.Y.;Oreg.;Pa.;Utah;Wash.;Wyo.;Mexico;South America;Eurasia;Africa;Pacific Islands (New Zealand);Australia.
|discussion=<p><i>Sarmentypnum exannulatum</i> is one of the most frequent wetland species, with leaves that narrow gradually to the apex and are gradually curved throughout. The marginal laminal cells in the widest part of the stem leaves are often distinctly rectangular, distinctly widened, or both; this feature is never as pronounced in other species of <i>Sarmentypnum</i> as in <i>S. exannulatum</i>. However, because this feature is rather variable it should be used with caution when identifying material. <i>Warnstorfia fluitans</i> and <i>W. pseudostraminea</i> differ from <i>S. exannulatum</i> in being autoicous, having mainly narrowly triangular to lanceolate pseudoparaphyllia, hardly ever with pure red pigments, and with more weakly differentiated alar regions. The alar regions in <i>W. fluitans</i> usually reach less far distally in the leaf than in <i>S. exannulatum</i>, whereas those in <i>W. pseudostraminea</i> often form ovate regions together with the supra-alar cells. Phenotypes of <i>S. exannulatum</i>, found in springs, with inflated alar cells in more or less one row along the leaf base have been called W. exannulata <i></i></i>var.<i><i> purpurascens</i>. However, transitions between these phenotypes and those from other habitats exist, and if the different phenotypes are cultivated together, the resulting plants cannot be separated (based on north European material).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Sarmentypnum exannulatum
|author=
|authority=(Schimper) Hedenas
|rank=species
|parent rank=genus
|synonyms=Drepanocladus exannulatus;D. exannulatus var. purpurascens;D. exannulatus var. rotae;Warnstorfia exannulata;W. exannulata var. purpurascens
|basionyms=Hypnum exannulatum
|family=Calliergonaceae
|habitat=Intermediately mineral-rich fens, around springs, late snow beds, submerged in lakes
|elevation=low to high elevations (0-4200 m)
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Md.;Mass.;Mich.;Minn.;Mont.;Nev.;N.H.;N.Y.;Oreg.;Pa.;Utah;Wash.;Wyo.;Mexico;South America;Eurasia;Africa;Pacific Islands (New Zealand);Australia.
|reference=None
|publication title=J. Hattori Bot. Lab.
|publication year=2006
|special status=Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V28/V28_628.xml
|genus=Sarmentypnum
|species=Sarmentypnum exannulatum
}}<!--

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