View source for Rhizomnium appalachianum

{{Treatment/ID
|accepted_name=Rhizomnium appalachianum
|accepted_authority=T. J. Koponen
|publications={{Treatment/Publication
|title=Ann. Bot. Fenn.
|place=10: 11, figs. 38–48. 1973
|year=1973
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Mnium punctatum var. appalachianum
|authority=(T. J. Koponen) H. A. Crum & L. E. Anderson
|rank=variety
}}
|hierarchy=Mniaceae;Rhizomnium;Rhizomnium appalachianum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Mniaceae]]</div><div class="higher-taxon"><small>genus</small>[[Rhizomnium]]</div><div class="higher-taxon"><small>species</small>[[Rhizomnium appalachianum]]</div></div>
|volume=Volume 28
|mention_page=page 239, 240
|treatment_page=page 238
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>4–8(–12) cm. <b>Stems</b> dark reddish brown or brown when old; micronemata present. <b>Leaves</b> green or dark green, slightly or moderately contorted, broadly elliptic, obovate, or rarely orbicular, 6.5–10(–13) mm; margins reddish, brown, rarely green, or blackish with age, 2-stratose; apex rounded or sometimes retuse, bluntly apiculate; costa percurrent, rarely subpercurrent or ending well before apex; medial laminal cells elongate or short-elongate, (50–)100–180(–210) µm, not or weakly collenchymatous, walls rarely weakly pitted; marginal cells linear, in 2–3(–4) rows. <b>Sexual</b> condition dioicous. <b>Seta</b> 1.5–3.5 cm. <b>Capsule</b> oblong or cylindric, 2–3 mm; operculum conic-rostrate; exostome yellow-brown, lamellae 18+. <b>Spores</b> 29–41 µm.</span><!--

-->{{Treatment/Body
|phenology=Capsules mature summer.
|habitat=Swamps, seeps, along lakeshores and stream banks on logs, moist soil, humus, rock
|elevation=low to moderate elevations
|distribution=Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Ga.;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.Y.;N.C.;Pa.;S.C.;Tenn.;Vt.;W.Va.;Wis.
|discussion=<p><i>Rhizomnium appalachianum</i> and <i>R. magnifolium</i> are not only macroscopically similar, but also consistently overlap in a number of microscopic traits, including length of the costa, marginal coloration, and apex morphology. This prompted H. A. Crum and L. E. Anderson (1981) to consider them varieties of <i>Mnium</i> punctatum (as vars. appalachianum and elatum). A few characters in addition to those in the key may help separate the species. Laminal cells adjacent to the leaf margins of <i>R. appalachianum</i> are often much smaller than the cells adjacent to the costa and more or less isodiametric. Laminal cells near the margins of <i>R. magnifolium</i> contrast less in size with the medial cells and are often short-elongate and less commonly more or less isodiametric. Rhizoids are sometimes present along leaf bases of <i>R. appalachianum</i> and are usually, but not always, absent in <i>R. magnifolium</i>. <i>Rhizomnium appalachianum</i> is a generally larger plant than <i>R. magnifolium</i>, has broader leaves which are nearly orbicular in some instances, and have a tendency to be slightly ruffled or bent when moist and do not lie flat on a slide; the leaves of <i>R. magnifolium</i> usually readily flatten.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Rhizomnium appalachianum
|authority=T. J. Koponen
|rank=species
|parent rank=genus
|synonyms=Mnium punctatum var. appalachianum
|basionyms=
|family=Mniaceae
|phenology=Capsules mature summer.
|habitat=Swamps, seeps, along lakeshores and stream banks on logs, moist soil, humus, rock
|elevation=low to moderate elevations
|distribution=Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Ga.;Maine;Md.;Mass.;Mich.;Minn.;N.H.;N.Y.;N.C.;Pa.;S.C.;Tenn.;Vt.;W.Va.;Wis.
|reference=None
|publication title=Ann. Bot. Fenn.
|publication year=1973
|special status=Endemic;Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V28/V28_381.xml
|genus=Rhizomnium
|species=Rhizomnium appalachianum
}}<!--

-->[[Category:Treatment]][[Category:Rhizomnium]]