View source for Symphyotrichum yukonense

{{Treatment/ID
|accepted_name=Symphyotrichum yukonense
|accepted_authority=(Cronquist) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 294. 1995
|year=1995
}}
|common_names=Yukon 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 yukonensis
|authority=Cronquist
|rank=species
|publication_title=Madroño
|publication_place=8: 98. 1945
}}
|synonyms={{Treatment/ID/Synonym
|name=Virgulus yukonensis
|authority=(Cronquist) Reveal & Keener
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Virgulus;Symphyotrichum yukonense
|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 yukonense]]</div></div>
|volume=Volume 20
|mention_page=page 471, 483
|treatment_page=page 485
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>cespitose or colonial, 5–30 cm; with short, erect, woody caudices from long, thin rhizomes. <b>Stems</b> 1–8+, erect (purplish to brown, slender), villous, more densely so distally, distally moderately stipitate-glandular. <b>Leaves</b> (yellowish to dark green. midrib purplish, often prominent) thin, reduced distally, margins entire; basal withering by flowering, winged-petiolate to subpetiolate (petioles ± sheathing), blades narrowly oblanceolate, 8–15 × 1–3 mm, bases attenuate, margins scabrous, apices obtuse to acute, faces glabrous or glabrate; proximal cauline often withering by flowering, sessile or subsessile, blades linear-oblanceolate, 20–70 × 1–4 mm, bases ± clasping, margins ciliate, apices acute, abaxial faces glabrous or midnerve ± sparsely villous, adaxial glabrous or sparsely villous, midnerves ± villous; distal sessile, blades linear-lanceolate, 10–30 × 1–2.5 mm, bases ± subclasping, ± rounded to subauriculate, margins sometimes stipitate-glandular, apices acute, mucronate or white-spinulose, faces glabrous or sparsely villous, short-stipitate-glandular. <b>Heads</b> usually borne singly, sometimes in open, corymbo-paniculiform arrays, branches ascending. <b>Peduncles</b> ± densely short-villous, ± densely stipitate-glandular, bracts 1–3, foliaceous, reduced. <b>Involucres</b> campanulate, 7–10 mm. <b>Phyllaries</b> in 3–4(–5) series, linear-lanceolate, subequal, bases scarious, margins hyaline or purplish, scarious, erose, ciliate or short-stipitate-glandular, green zones herbaceous at least distally, often purplish to purple, apices long-acuminate, spreading to reflexed, faces ± densely villous (outer more so), ± densely stipitate-glandular. <b>Ray</b> florets (8–)15–30; corollas purple to blue, laminae 5–11 × 0.5–2 mm. <b>Disc</b> florets 16–38; corollas yellow becoming brown, 4–6.5 mm, lobes triangular, 0.4–0.8 mm. <b>Cypselae</b> brown (sometimes purplish, nerves stramineous), narrowly obovoid, ± compressed, ca. 3 mm, 7–10-nerved, faces sparsely to moderately sericeo-strigose; pappi sordid (barb tips sometimes purplish-tinged), 3.5–4.8 mm. <b>2n</b> = 10.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Aug.
|habitat=Mud flats, gravelly, stony or silty lakeshores, sometimes saline areas
|elevation=300–1500 m
|distribution=N.W.T.;Yukon;Alaska.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Symphyotrichum yukonense</i> is distributed disjunctly on the John River in the southern Brooks Range (Alaska), Lake Kluane (Yukon), and the Mackenzie Mountains and middle Mackenzie River (Northwest Territories). It appears closely related to <i>S. pygmaeum</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Symphyotrichum yukonense
|authority=(Cronquist) G. L. Nesom
|rank=species
|parent rank=subgenus
|synonyms=Virgulus yukonensis
|basionyms=Aster yukonensis
|family=Asteraceae
|phenology=Flowering Jul–Aug.
|habitat=Mud flats, gravelly, stony or silty lakeshores, sometimes saline areas
|elevation=300–1500 m
|distribution=N.W.T.;Yukon;Alaska.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=Endemic;Conservation concern
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1091.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Virgulus
|species=Symphyotrichum yukonense
}}<!--

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