View source for Sphagnum sect. Sphagnum

{{Treatment/ID
|accepted_name=Sphagnum sect. Sphagnum
|accepted_authority=
|publications=
|basionyms=
|synonyms=
|hierarchy=Sphagnaceae;Sphagnum;Sphagnum sect. Sphagnum
|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. Sphagnum]]</div></div>
|volume=Volume 27
|mention_page=page 47, 49, 54
|treatment_page=page 48
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="capitulum fusion"><b>Plants </b>typically large, with distinct capitulum;</span> <span class="statement" id="st-d0_s1" data-properties="whole_organism size;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism coloration;whole_organism growth form">green, pale green, yellowish, red, tan, brown to dark-brown.</span> <span class="statement" id="st-d0_s2" data-properties="stem coloration;stem coloration;stem coloration;layer quantity;bud shape;bud architecture;superficial bud quantity;superficial bud fragility;superficial bud shape;fibril prominence;fibril arrangement or course;interior wall quantity"><b>Stems </b>green, brown or reddish, outer cortex of 3–4 layers of inflated, thin-walled cells, superficial cells with conspicuous to faint spiral fibrils, no or strong ornamention on interior wall, and 1–6 round to ovate pores per cell.</span> <span class="statement" id="st-d0_s3" data-properties="stem-leaf shape;branch leaf size;branch leaf size;apex width;apex shape;border shape"><b>Stem-</b>leaves typically as large as or larger than branch leaves, lingulate to ovate-lingulate with broad rounded apex, border fringed;</span> <span class="statement" id="st-d0_s4" data-properties="bud coloration;bud shape;bud architecture;bud texture;bud relief;bud architecture">hyaline cells rhomboid, efibrillose or fibrillose, sometimes ornamented, aporose, 0–2-septate, and often resorbed on exterior surface.</span> <span class="statement" id="st-d0_s5" data-properties="branch growth form;branch orientation;branch shape;branch orientation;branch height or length or size;branch size"><b>Branches </b>dimorphic, spreading branches tumid, pendent branches usually shorter and more slender.</span> <span class="statement" id="st-d0_s6" data-properties="branch arrangement;branch quantity;branch orientation;branch orientation"><b>Branch </b>fascicles with 2–3 spreading branches and 1–3 pendent branches.</span> <span class="statement" id="st-d0_s7" data-properties="branch stem coloration;branch stem architecture;branch stem texture;layer quantity;bud size;bud architecture;species relief"><b>Branch </b>stems green, surrounded by 1 layer of enlarged thin-walled cells, typically porose and fibrillose, in some species ornamented on interior wall;</span> <span class="statement" id="st-d0_s8" data-properties="retort bud presence">retort cells absent.</span> <span class="statement" id="st-d0_s9" data-properties="branch leaf shape;apex shape;apex relief or texture;surface shape"><b>Branch </b>leaves ovate to broadly ovate, apex cucullate and roughened on convex surface;</span> <span class="statement" id="st-d0_s10" data-properties="margin shape">margin toothed;</span> <span class="statement" id="st-d0_s11" data-properties="bud coloration;bud texture">hyaline cells fibrillose;</span> <span class="statement" id="st-d0_s12" data-properties="surface pore shape;surface pore shape;surface pore quantity;bud quantity;bud arrangement;bud coloration">convex surface pores round to elliptic, usually with 1 at each corner of three adjacent hyaline cells;</span> <span class="statement" id="st-d0_s13" data-properties="bud architecture;bud shape;wall prominence">chlorophyllous cells lenticular to triangular, sometimes with wall ornamentation visible in transverse-section;</span> <span class="statement" id="st-d0_s14" data-properties="bud architecture;bud position;bud prominence;bud prominence;surface shape">chlorophyllous cells enclosed, equally exposed, or more broadly exposed on concave surface, end walls thickened or unthickened.</span> <span class="statement" id="st-d0_s15" data-properties="end wall size;end wall size;end wall reproduction;end wall reproduction"><b>Sexual </b>condition usually dioicous.</span> <span class="statement" id="st-d0_s16" data-properties="capsule some measurement"><b>Capsule </b>2 mm or more.</span> <span class="statement" id="st-d0_s17" data-properties="spore some measurement;distal surface sculpture"><b>Spores </b>typically 22–30 µm, distal surface sculpture may present;</span> <span class="statement" id="st-d0_s18" data-properties="proximal laesurum quantity">proximal laesura usually more than 0.5 spore radius.</span><!--

-->{{Treatment/Body
|distribution=Worldwide except Antarctica
|discussion=<p>Species 54 (12 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Branch leaf chlorophyllous cells in transverse section ± equilateral-triangular, often with conspicuous vertically oriented comb-fibrils on the hyaline cells where overlying chlorophyllous cells
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Branch leaf chlorophyllous cells in transverse section narrowly triangular, trapezoidal, truncate-elliptic, elliptic or lenticular; comb-fibrils if present horizontally oriented
|[[#key-0-6| > 6]]
|-id=key-0-2
|2
|Branch cortical cells with funnel-like projections often extending halfway or more into the next cell; branches strongly clavate and blunt.
|[[Sphagnum portoricense|Sphagnum portoricense]]
|-id=key-0-2
|2
|Branch cortical cells with flat end walls or with weak funnel-like projections extending less than halfway into the next cell; branches not clavate or if clavate, with pointed ends
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Interior layer of stem cortical cells with distinct comb-lamellae; branch leaves with or without comb-lamellae; stem leaves without comb-lamellae.
|[[Sphagnum affine|Sphagnum affine]]
|-id=key-0-3
|3
|Interior layer of stem cortical cells without comb-lamellae or at least not visible with a light microscope; branch leaves with comb-lamellae; stem leaves with or without comb-lamellae
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Stem leaf hyaline cells with distinct comb-lamellae; branches clavate and pointed; branches leaves strongly imbricate.
|[[Sphagnum austinii|Sphagnum austinii]]
|-id=key-0-4
|4
|Stem leaf hyaline cells without distinct comb-lamellae; branches not clavate; branch leaves more or less spreading
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Stem leaves short (ca. 0.8-1.1 mm); branch leaves broad (breadth:length ca. 0.7-0.8), branch leaf comb-lamellae usually distinct only in lower half of leaf; branch cortical comb-lamellae present; plants yellow to golden brown.
|[[Sphagnum imbricatum|Sphagnum imbricatum]]
|-id=key-0-5
|5
|Stem leaves long (ca. 1.1-1.5 mm.); branch leaves narrow (breadth:length ca. 0.6-0.68), branch leaf comb-lamellae distinct throughout most of leaf; branch cortical cell comb-lamellae usually absent; plants dark brown.
|[[Sphagnum steerei|Sphagnum steerei]]
|-id=key-0-6
|6
|Branch leaf chlorophyllous cells in transverse section short-elliptic, elliptic to lenticular, and enclosed on both surfaces
|[[#key-0-7| > 7]]
|-id=key-0-6
|6
|Branch leaf chlorophyllous cells in transverse section narrowly triangular, rectangular to truncate-elliptic, exposed equally on both surfaces or more broadly on the convex surface
|[[#key-0-9| > 9]]
|-id=key-0-7
|7
|Branch leaf chlorophyllous cells in transverse section short-elliptic and well enclosed; plants purplish red when pigmented.
|[[Sphagnum magellanicum|Sphagnum magellanicum]]
|-id=key-0-7
|7
|Branch leaf chlorophyllous cells in transverse section narrowly elliptic and slightly enclosed on both surfaces; plants brown when pigmented
|[[#key-0-8| > 8]]
|-id=key-0-8
|8
|Branch leaf chlorphyllous cells in transverse section without thickened ends walls; superficial stem cortical cells with reinforcing fibrils weak or absent; branch leaf hyaline cells where overlying chlorophyll cells often with comb-fibrils
|[[Sphagnum alaskense|Sphagnum alaskense]]
|-id=key-0-8
|8
|Branch leaf chlorphyllous cells in transverse section with thickened end walls; superficial stem cortical cells with strong reinforcing fibrils; branch leaf hyaline cells where overlying chlorophyllous cells smooth.
|[[Sphagnum centrale|Sphagnum centrale]]
|-id=key-0-9
|9
|Branch leaf hyaline cells papillose where overlying chlorophyllous cells.
|[[Sphagnum papillosum|Sphagnum papillosum]]
|-id=key-0-9
|9
|Branch leaf hyaline cells epapillose where overlying chlorophyllous cells
|[[#key-0-10| > 10]]
|-id=key-0-10
|10
|Superficial stem cortical cells with fibrils weak or lacking; chlorophyllous cells rectangular to truncate-elliptic, exposed equally on both surfaces.
|[[Sphagnum perichaetiale|Sphagnum perichaetiale]]
|-id=key-0-10
|10
|Superficial stem cortical cells with strong fibrils; chlorophyllous cells triangular, exposed more broadly on concave surface
|[[#key-0-11| > 11]]
|-id=key-0-11
|11
|Branch leaf hyaline cells where overlying chlorophyllous cells often with irregular worm-like ridges, especially at the leaf base; pores on the convex surface numerous, small and round to elliptic.
|[[Sphagnum henryense|Sphagnum henryense]]
|-id=key-0-11
|11
|Branch leaf hyaline cells smooth throughout; pores on the convex surface elliptic to flattened-elliptic, not numerous.
|[[Sphagnum palustre|Sphagnum palustre]]
|}
</div></div><!--

-->{{#Taxon:
name=Sphagnum sect. Sphagnum
|authority=
|rank=section
|parent rank=genus
|synonyms=
|basionyms=
|family=Sphagnaceae
|distribution=Worldwide except Antarctica
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V27/V27_7.xml
|genus=Sphagnum
|section=Sphagnum sect. Sphagnum
|apex relief or texture=roughened
|apex shape=cucullate;rounded
|apex width=broad
|border shape=fringed
|branch arrangement=fascicles
|branch growth form=dimorphic
|branch height or length or size=shorter
|branch leaf shape=ovate;broadly ovate
|branch leaf size=larger;larger
|branch orientation=pendent;spreading;pendent;spreading
|branch quantity=2;3
|branch shape=tumid
|branch size=slender
|branch stem architecture=porose
|branch stem coloration=green
|branch stem texture=fibrillose
|bud architecture=chlorophyllous;chlorophyllous;thin-walled;0-2-septate;efibrillose;thin-walled
|bud arrangement=adjacent
|bud coloration=hyaline;hyaline;hyaline
|bud position=enclosed
|bud prominence=exposed;exposed
|bud quantity=3
|bud relief=ornamented
|bud shape=lenticular;triangular
|bud size=enlarged
|bud texture=fibrillose;fibrillose
|capitulum fusion=distinct
|capsule some measurement=2
|distal surface sculpture=present
|end wall reproduction=dioicous;sexual
|end wall size=unthickened;thickened
|fibril arrangement or course=spiral
|fibril prominence=conspicuous;faint
|interior wall quantity=1;6
|layer quantity=1;3;4
|margin shape=toothed
|retort bud presence=absent
|species relief=ornamented
|spore some measurement=22um;30um
|stem coloration=reddish;brown;green
|stem-leaf shape=lingulate;ovate-lingulate
|superficial bud fragility=strong
|superficial bud quantity=no
|superficial bud shape=round;ovate
|surface pore quantity=1
|surface pore shape=round;elliptic
|surface shape=concave;convex
|wall prominence=visible
|whole_organism coloration=brown;dark-brown
|whole_organism growth form=plant
|whole_organism size=large
}}<!--

-->[[Category:Treatment]][[Category:Sphagnum]]