View source for Eurybia sibirica

{{Treatment/ID
|accepted_name=Eurybia sibirica
|accepted_authority=(Linnaeus) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 261. 1995
|year=1995
}}
|common_names=Arctic aster
|basionyms={{Treatment/ID/Synonym
|name=Aster sibiricus
|authority=Linnaeus
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster beringensis
|authority=Gandoger
}} {{Treatment/ID/Synonym
|name=Aster giganteus
|authority=(Hooker) Rydberg
}} {{Treatment/ID/Synonym
|name=Aster montanus
|authority=R. Brown
}} {{Treatment/ID/Synonym
|name=Aster montanus var. giganteus
|authority=(Hooker) Torrey & A. Gray
}} {{Treatment/ID/Synonym
|name=Aster richardsonii
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Aster richardsonii var. giganteus
|authority=Hooker
}} {{Treatment/ID/Synonym
|name=Aster sibiricus subsp. richardsonii
|authority=(Sprengel) Á. Löve & D. Löve
}} {{Treatment/ID/Synonym
|name=Aster sibiricus var. giganteus
|authority=(Hooker) A. Gray
}} {{Treatment/ID/Synonym
|name=Eurybia sibirica var. gigantea
|authority=(Hooker) G. L. Nesom
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Eurybia;Eurybia sibirica
|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>[[Eurybia]]</div><div class="higher-taxon"><small>species</small>[[Eurybia sibirica]]</div></div>
|volume=Volume 20
|mention_page=page 368, 371, 459, 485
|treatment_page=page 370
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>(1–)5–60 cm; clonal and clumped, eglandular; rhizomes creeping to ascending, scaly, woody with age. <b>Stems</b> 1–5+, usually ascending, sometimes decumbent, often purplish, sometimes branched basally, flexuous, proximally sparsely villous, distally usually densely villous, sometimes lanate. <b>Leaves</b>: cauline (dark green abaxially, paler grayish green adaxially), firm, ± markedly veined, margins coarsely and sometimes irregularly serrate, sometimes (distal) serrulate or entire, villoso-ciliate, teeth mucronate, slightly incurved, apices obtuse to acute, mucronate, abaxial faces glabrescent to scabridulous, sparsely villous along veins, adaxial sparsely to ± densely villous or villoso-strigose; proximal winged-petiolate to sessile, petiole bases sheathing, blades spatulate, obovate to oblanceolate, or ovate (smaller than mid), 9–50 × 3–22 mm, bases attenuate to tapering and (in sessile) subclasping; mid short-petiolate to subpetiolate or sessile, blades lanceolate to lance-ovate, oblong to oblanceolate, or obovate to spatulate, 25–95 × 6–35 mm, gradually reduced distally, bases rounded or subauriculate to widely attenuate or cuneate; distal (arrays) sessile, lanceolate, lance-ovate, or elliptic to oblanceolate, 8–60 × 1–12 mm, rapidly reduced distally. <b>Heads</b> 1–50, borne singly or in open corymbiform arrays. <b>Peduncles</b> villous; bracts 0–3, sometimes immediately subtending heads, lanceolate or spatulate to linear-lanceolate, leaflike or phyllary-like distally (bases indurate, margins purplish), mostly foliaceous, villous. <b>Involucres</b> campanulate, 6–9 mm, shorter than pappi. <b>Phyllaries</b> 30–80 in 3–4(–5) series, sometimes wholly purplish, usually ± oblong-lanceolate to oblanceolate, sometimes linear-lanceolate (innermost), subequal or ± unequal, membranous, bases indurate, ± rounded, dark green zones lanceolate or truncate at base, in distal 1/3–4/5+ (outer, often foliaceous, sometimes bractlike and surpassing involucres) to 1/4–2/3 (inner), margins hyaline, often purplish, narrowly scarious, erose, densely villoso-ciliate, apices squarrose, acute, apiculate, faces villous. <b>Ray</b> florets 12–50; corollas white to pale violet or purple, 7–17.5 × 0.8–1.8 mm. <b>Disc</b> florets 25–125; corollas yellow becoming purplish, 5–8.1 mm, slightly ampliate, tubes longer than funnelform throats, lobes erect, triangular, 0.5–1.1 mm. <b>Cypselae</b> brown, fusiform, compressed, 2.5–3.7 mm, ribs 7–10 (stramineous), faces strigillose; pappi of dark cinnamon or reddish tan (sometimes apically clavellate) bristles 5.5–7.5 mm, ± equaling disc corollas. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer.
|habitat=Disturbed, open, gravelly or sandy areas in boreal forest, wet meadows, open aspen and spruce woods, riparian thickets, sandy or gravelly stream flats, stream banks, lakeshores, bluffs, sand dunes, sandy places, subalpine and mountain meadows
|elevation=0–2200 m
|distribution=Alta.;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Idaho;Mont.;n Eurasia.
|discussion=<p><i>Eurybia sibirica</i> is known from the northern Rocky Mountains and the northern Pacific Coast northward, becoming frequent in Alaska, Yukon, and in the boreal forest region of the continental Northwest Territories; it crosses into Siberia to reach Scandinavia (R. Elven 1989). In British Columbia, northern individuals belong to <i>E. sibirica</i>, not E. pygmaea (contra G. W. Douglas et al. 1998–2002, vol. 1), and southern specimens sometimes are <i>E. merita</i>. G. L. Nesom (1994b) recognized three varieties, two of which have been reported from North America (var. sibirica and <i></i>var.<i> gigantea</i>). At present, however, given the great phenotypic plasticity of this species, it appears preferable not to recognize varieties, pending studies on the validity of these entities. <i>Eurybia sibirica</i> has often been confused at its southern range limit with <i>E. merita</i>, from which it differs by its often more low-cespitose habit (versus more erect habit, but smaller individuals may be similar in this respect), usually more serrate leaves (versus subserrate to nearly entire), and subequal, foliaceous, purplish phyllaries (versus unequal, non-foliaceous, purple-margined). At the southern end of its range, near the Canada–United States border, <i>E. sibirica</i> is usually found at higher elevations than its congener, there at its northern limit. <i>Aster</i> sibiricus forma albinus Lepage is merely a color variant of the species and is not recognized here.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eurybia sibirica
|author=
|authority=(Linnaeus) G. L. Nesom
|rank=species
|parent rank=genus
|synonyms=Aster beringensis;Aster giganteus;Aster montanus;Aster montanus var. giganteus;Aster richardsonii;Aster richardsonii var. giganteus;Aster sibiricus subsp. richardsonii;Aster sibiricus var. giganteus;Eurybia sibirica var. gigantea
|basionyms=Aster sibiricus
|family=Asteraceae
|phenology=Flowering summer.
|habitat=Disturbed, open, gravelly or sandy areas in boreal forest, wet meadows, open aspen and spruce woods, riparian thickets, sandy or gravelly stream flats, stream banks, lakeshores, bluffs, sand dunes, sandy places, subalpine and mountain meadows
|elevation=0–2200 m
|distribution=Alta.;B.C.;N.W.T.;Nunavut;Yukon;Alaska;Idaho;Mont.;n Eurasia.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V20_852.xml
|tribe=Asteraceae tribe Astereae
|genus=Eurybia
|species=Eurybia sibirica
}}<!--

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