View source for Sphagnum andersonianum

{{Treatment/ID
|accepted_name=Sphagnum andersonianum
|accepted_authority=R. E. Andrus
|publications={{Treatment/Publication
|title=Bryologist
|place=83: 60, figs. 1–7. 1980,
}}
|basionyms=
|synonyms=
|hierarchy=Sphagnaceae;Sphagnum;Sphagnum sect. Acutifolia;Sphagnum andersonianum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Sphagnaceae]]</div><div class="higher-taxon"><small>genus</small>[[Sphagnum]]</div><div class="higher-taxon"><small>section</small>[[Sphagnum sect. Acutifolia]]</div><div class="higher-taxon"><small>species</small>[[Sphagnum andersonianum]]</div></div>
|volume=Volume 27
|mention_page=page 81, 86, 89, 96
|treatment_page=page 88
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>small, soft and slender; capitulum small; pale pink to pale purplish red; without metallic lustre when dry. <b>Stems</b> pale brown, green or red, rarely purplish red; superficial cortical cells aporose. <b>Stem</b> leaves lingulate, 0.9–1.2(–1.4) mm, apex rounded-erose to sometimes slightly apiculate, border moderately strong and broadened at the base (to 0.8 the width); hyaline cells rhombic, 0–1-septate, usually efibrillose. <b>Branches</b> not or slightly 5-ranked, lax. <b>Branch</b> fascicles with 2 spreading and 1–2 pendent branches. <b>Branch</b> leaves ovate, 0.8–1.4 mm, distinctly concave, straight, apex dentate and involute; border entire; hyaline cells on convex surface with elliptic pores along the commissures, grading from smaller pores near the apex to larger pores at the base, concave surface with large round pores on the proximal portions of the leaf. <b>Sexual</b> condition dioicous. <b>Spores</b> 18–24 µm; coarsely papillose on both surfaces; proximal laesura less than 0.5 the length of the spore radius.</span><!--

-->{{Treatment/Body
|habitat=Weakly minerotrophic
|elevation=low to moderate elevations
|distribution=B.C.;Nfld. and Labr. (Nfld.);N.S.;Que.;Alaska;Conn.;Maine;Mass.;N.H.;N.Y.;R.I.;Vt.;Europe.
|discussion=<p>Sporophytes are uncommon in <i>Sphagnum andersonianum</i>. Its distribution is uncertain due to past taxonomic confusion with <i>S. rubellum</i>, <i>S. capillifolium</i>, and other closely related species in sect. Acutifolia. This is one of the most hydrophytic species of the section and is often associated with <i>S. angustifolium</i>, <i>S. fallax</i>, and <i>S. rubellum</i>. It is often not easily distinguished from <i>S. rubellum</i>, with which it may intergrade in a manner similar to that already demonstrated for <i>S. rubellum</i> and <i>S. capillifolium</i> by N. Cronberg (1997, 1998). Phenotypically <i>S. andersonianum</i> is a softer, paler plant with branch leaves that are more ovate and concave on branches that are less 5-ranked. <i>Sphagnum rubellum</i> also has the branch leaves sometimes subsecund while in <i>S. andersonianum</i> they are straight. Ecologically <i>S. rubellum</i> is an open mire species of usually ombrotrophic conditions, where it often forms hummocks, while <i>S. andersonianum</i> occurs in more sheltered sites where there is some mineral influence. Where they occur together, <i>S. rubellum</i> is on the tops of hummocks and <i>S. andersonianum</i> is on the hummock sides and bases. Microscopically <i>S. rubellum</i> has stem leaves with at least some of the hyaline cells twice septate, while in <i>S. andersonianum</i> none are twice septate.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Sphagnum andersonianum
|author=
|authority=R. E. Andrus
|rank=species
|parent rank=section
|synonyms=
|basionyms=
|family=Sphagnaceae
|habitat=Weakly minerotrophic
|elevation=low to moderate elevations
|distribution=B.C.;Nfld. and Labr. (Nfld.);N.S.;Que.;Alaska;Conn.;Maine;Mass.;N.H.;N.Y.;R.I.;Vt.;Europe.
|reference=None
|publication title=Bryologist
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V27/V27_82.xml
|genus=Sphagnum
|section=Sphagnum sect. Acutifolia
|species=Sphagnum andersonianum
}}<!--

-->[[Category:Treatment]][[Category:Sphagnum sect. Acutifolia]]