View source for Symphyotrichum pygmaeum

{{Treatment/ID
|accepted_name=Symphyotrichum pygmaeum
|accepted_authority=(Lindley) Brouillet & S. Selliah
|publications={{Treatment/Publication
|title=Sida
|place=21: 1635. 2005
|year=2005
}}
|common_names=Pygmy aster
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster pygmaeus
|authority=Lindley
|rank=species
|publication_title=in W. J. Hooker, Fl. Bor.-Amer.
|publication_place=2: 6. 1834
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster sibiricus subsp. pygmaeus
|authority=(Lindley) Á. Löve & D. Löve
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Aster sibiricus var. pygmaeus
|authority=(Lindley) Cody
|rank=variety
}} {{Treatment/ID/Synonym
|name=Eurybia pygmaea
|authority=
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Virgulus;Symphyotrichum pygmaeum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Symphyotrichum]]</div><div class="higher-taxon"><small>subgenus</small>[[Symphyotrichum subg. Virgulus]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum pygmaeum]]</div></div>
|volume=Volume 20
|mention_page=page 470, 483
|treatment_page=page 485
}}<!--

--><span class="statement" id="st-d0_s0" data-properties=""><b>Perennials </b>1.5–15 cm, cespitose;</span> <span class="statement" id="st-d0_s1" data-properties="whole-organism some measurement;whole-organism growth form;whole-organism duration;caudex height or length or size;caudex architecture;caudex architecture">with short, branched caudices, long-rhizomatous (both wiry).</span> <span class="statement" id="st-d0_s2" data-properties="stem quantity;stem orientation;stem pubescence"><b>Stems </b>1–10+, decumbent to ascending (purple), sparsely or densely villous to woolly distally.</span> <span class="statement" id="st-d0_s3" data-properties="leaf texture;margin architecture or shape;margin architecture or shape;margin architecture or pubescence or shape;apex shape;apex shape"><b>Leaves </b>firm, margins usually entire, sometimes remotely pauci-serrulate, sparsely villoso-ciliate, apices obtuse to acute, sometimes mucronate;</span> <span class="statement" id="st-d0_s4" data-properties="basal leaf life cycle;blade life cycle;blade architecture;blade shape;blade length;blade width;blade shape;blade shape;blade pubescence;blade pubescence;base life cycle;base architecture;base shape;base length;base width;base shape;base shape;base pubescence;base pubescence;apex life cycle;apex architecture;apex shape;apex length;apex width;apex shape;apex shape;apex pubescence;apex pubescence;face life cycle;face architecture;face shape;face length;face width;face shape;face shape;face pubescence;face pubescence">basal often withering by flowering, petiolate (petioles widely winged, sheathing), blades spatulate, 5–19 × 2–4 mm, bases attenuate, apices rounded, faces glabrous or sparsely villous proximally;</span> <span class="statement" id="st-d0_s5" data-properties="proximal leaf architecture;blade shape;blade length;blade width;base architecture or fixation;apex shape;face pubescence;face pubescence">proximal sessile, blades lanceolate to oblong-lanceolate or (sometimes) spatulate, 30–50 × 3–10 mm, bases ± clasping, apices obtuse to acute, faces glabrous or sparsely villous;</span> <span class="statement" id="st-d0_s6" data-properties="distal leaf architecture;blade shape;blade length;blade width;base architecture or fixation;base shape;apex shape;face pubescence;face pubescence">distal sessile, blades lanceolate to oblong, 13–19 × 2–4.5 mm, bases clasping to cuneate, apices acute to obtuse, faces sparsely woolly, sometimes sparsely stipitate-glandular.</span> <span class="statement" id="st-d0_s7" data-properties="head arrangement"><b>Heads </b>borne singly.</span> <span class="statement" id="st-d0_s8" data-properties="peduncle pubescence;bract presence"><b>Peduncles </b>densely villous to lanate distally, bracts 0.</span> <span class="statement" id="st-d0_s9" data-properties="involucre shape;involucre some measurement"><b>Involucres </b>hemispherico-campanulate, 9–12.5 mm.</span> <span class="statement" id="st-d0_s10" data-properties="phyllarie shape;phyllarie arrangement or course or shape;phyllarie size;series quantity;outer phyllarie growth form or texture;base texture;margin texture;margin architecture or relief;margin coloration or density;margin architecture or pubescence or shape;portion coloration;zone coloration;zone quantity;apex shape;inner phyllarie architecture or shape;inner phyllarie fixation or orientation;inner phyllarie architecture or fragility;inner phyllarie orientation;face pubescence;face pubescence"><b>Phyllaries </b>in 3–4 series (dark purple), lance-oblong or oblong (outer) to linear-lanceolate or sometimes linear (inner), subequal, outer ± herbaceous, bases not indurate, margins herbaceous (outer) to narrowly scarious and erose proximally (inner), strongly purple, villoso-ciliate in green portion, green zones (inner) 1/2–2/3 of distal portions, apices acute to acuminate, inner sometimes apiculate, appressed to loose and squarrose (particularly outer), faces woolly to densely villous, sparsely to moderately stipitate-glandular.</span> <span class="statement" id="st-d0_s11" data-properties="ray-floret quantity"><b>Ray-</b>florets 16–28;</span> <span class="statement" id="st-d0_s12" data-properties="corolla coloration;lamina length;lamina width">corollas purple to violet, laminae 12–18 × 2–3.2 mm.</span> <span class="statement" id="st-d0_s13" data-properties="disc-floret quantity"><b>Disc-</b>florets 53–55;</span> <span class="statement" id="st-d0_s14" data-properties="corolla coloration;corolla some measurement;lobe shape;lobe some measurement">corollas yellow, 5.6–6.5 mm, throats funnelform, lobes triangular, 0.5–0.8 mm (red or white clavate-hairy).</span> <span class="statement" id="st-d0_s15" data-properties="cypsela shape;cypsela shape;cypsela architecture;face pubescence"><b>Cypselae </b>fusiform to cylindro-obconic, ± compressed, [size unknown], 4–7-nerved (faint), faces ± densely strigillose;</span> <span class="statement" id="st-d0_s16" data-properties="pappus coloration;pappus some measurement">pappi whitish to yellowish, 5–7.2 mm.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Open, active, moist sand dunes, sandy or silty stream banks and terraces, usually cyclically disturbed gravelly tundra and tundra slopes
|elevation=0–200+ m
|distribution=N.W.T.;Nunavut;Alaska.
|discussion=<p>Of conservation concern.</p><!--
--><p>Symphyotrichum pygmaeum has long been included within or associated with Eurybia sibirica. Though similar in appearance, the two species can be distinguished by the glands present on S. pygmaeum on the distal leaves and phyllaries.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Symphyotrichum pygmaeum
|authority=(Lindley) Brouillet & S. Selliah
|rank=species
|parent rank=subgenus
|synonyms=Aster sibiricus subsp. pygmaeus;Aster sibiricus var. pygmaeus;Eurybia pygmaea
|basionyms=Aster pygmaeus
|family=Asteraceae
|phenology=Flowering summer.
|habitat=Open, active, moist sand dunes, sandy or silty stream banks and terraces, usually cyclically disturbed gravelly tundra and tundra slopes
|elevation=0–200+ m
|distribution=N.W.T.;Nunavut;Alaska.
|reference=None
|publication title=Sida
|publication year=2005
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20_1090.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Virgulus
|species=Symphyotrichum pygmaeum
|apex architecture=petiolate
|apex length=5mm;19mm
|apex life cycle=flowering
|apex pubescence=villous;glabrous
|apex shape=acute;acuminate
|apex width=2mm;4mm
|basal leaf life cycle=withering
|base architecture=petiolate
|base architecture or fixation=clasping;clasping
|base length=5mm;19mm
|base life cycle=flowering
|base pubescence=villous;glabrous
|base shape=cuneate;rounded;attenuate;spatulate
|base texture=not indurate
|base width=2mm;4mm
|blade architecture=petiolate
|blade length=13mm;19mm
|blade life cycle=flowering
|blade pubescence=villous;glabrous
|blade shape=lanceolate;oblong
|blade width=2mm;4.5mm
|bract presence=absent
|caudex architecture=long-rhizomatous;branched
|caudex height or length or size=short
|corolla coloration=yellow;purple;violet
|corolla some measurement=5.6mm;6.5mm
|cypsela architecture=4-7-nerved
|cypsela shape=compressed;fusiform;cylindro-obconic
|disc-floret quantity=53;55
|distal leaf architecture=sessile
|face architecture=petiolate
|face length=5mm;19mm
|face life cycle=flowering
|face pubescence=strigillose;villous;sparsely moderately stipitate-glandular
|face shape=rounded;attenuate;spatulate
|face width=2mm;4mm
|head arrangement=singly
|inner phyllarie architecture or fragility=loose
|inner phyllarie architecture or shape=apiculate
|inner phyllarie fixation or orientation=appressed
|inner phyllarie orientation=squarrose
|involucre shape=hemispherico-campanulate
|involucre some measurement=9mm;12.5mm
|lamina length=12mm;18mm
|lamina width=2mm;3.2mm
|leaf texture=firm
|lobe shape=triangular
|lobe some measurement=0.5mm;0.8mm
|margin architecture or pubescence or shape=villoso-ciliate;villoso-ciliate
|margin architecture or relief=erose
|margin architecture or shape=pauci-serrulate;entire
|margin coloration or density=purple
|margin texture=herbaceous;narrowly scarious
|outer phyllarie growth form or texture=herbaceous
|pappus coloration=whitish;yellowish
|pappus some measurement=5mm;7.2mm
|peduncle pubescence=densely villous;lanate
|phyllarie arrangement or course or shape=linear
|phyllarie shape=oblong;linear-lanceolate
|phyllarie size=subequal
|portion coloration=green
|proximal leaf architecture=sessile
|ray-floret quantity=16;28
|series quantity=3;4
|stem orientation=decumbent;ascending
|stem pubescence=villous;woolly
|stem quantity=1;10
|whole-organism duration=perennial
|whole-organism growth form=cespitose
|whole-organism some measurement=1.5cm;15cm
|zone coloration=green
|zone quantity=1/2;2/3
}}<!--

-->[[Category:Treatment]][[Category:Symphyotrichum subg. Virgulus]]