View source for Symphyotrichum retroflexum

{{Treatment/ID
|accepted_name=Symphyotrichum retroflexum
|accepted_authority=(Lindley ex de Candolle) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 291. 1995
|year=1995
}}
|common_names=Rigid whitetop aster
|basionyms={{Treatment/ID/Synonym
|name=Aster retroflexus
|authority=Lindley ex de Candolle
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster curtisii
|authority=Torrey & A. Gray
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Symphyotrichum;Symphyotrichum retroflexum
|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. Symphyotrichum]]</div><div class="higher-taxon"><small>section</small>[[Symphyotrichum sect. Symphyotrichum]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum retroflexum]]</div></div>
|volume=Volume 20
|mention_page=page 473, 475, 500
|treatment_page=page 510
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 40–100 cm, usually colonial, sometimes ± cespitose; short-(seldom long-)rhizomatous. <b>Stems</b> 1–2+, erect (straight to slightly flexuous, sometimes robust), glabrous. <b>Leaves</b> thin to firm, margins slightly recurved, scabrous, faces glabrous; basal mostly withering by flowering, petiolate (petioles narrowly winged, sheathing), blades lanceolate-ovate to ovate or spatulate, 25–110 × 10–40 mm, bases usually rounded to attenuate, seldom ± cordate, margins serrulate to shallowly serrate, apices obtuse to acute; proximal cauline often withering by flowering, petiolate (petioles ± widely winged, ± clasping), blades lance-ovate or narrowly ovate, 50–95 × 19–31 mm, bases usually rounded to attenuate, sometimes cuneate, rarely subcordate, margins serrate to serrulate; distal winged-petiolate or subpetiolate or sessile, blades lance-ovate or narrowly ovate to lanceolate or sometimes linear (in arrays), 7–1.5 × 3–31 mm, gradually and strongly reduced distally, bases cuneate, scarcely or not clasping, to slightly rounded and ± clasping, margins serrulate or entire, apices acute to acuminate. <b>Heads</b> in broad (appearing ± corymbiform) or narrow, paniculiform to ± racemiform arrays, branches usually long (to 10 cm), ascending to divaricate. <b>Peduncles</b> (when present) 0.2–1.5 cm, densely pilose or pilosulous, bracts 1–6+, lanceolate to oblong-lanceolate, foliaceous to distally grading into phyllaries. <b>Involucres</b> campanulate, (6–)7–10 mm. <b>Phyllaries</b> in 3–4(–5) series, broadly lanceolate constricted to narrow oblong bases (outer) to oblong-lanceolate or linear-lanceolate (inner), ± unequal, bases indurate 1/10–1/5 (outer) to 4/5+ (inner), margins hyaline, narrowly scarious, erose (indurate portion), sparsely ciliolate (foliaceous portion), green zones foliaceous (outer) to distal 1/5–1/4 foliaceous (inner), basally truncate to lanceolate, apices spreading to squarrose, acute to acuminate, mucronulate, abaxial faces glabrous or glabrate, adaxial strigillose (foliaceous portion). <b>Ray</b> florets 13–30; corollas blue to purple, laminae (10–)15–17 × 1.6–3 mm. <b>Disc</b> florets 35–50+; corollas cream to pale yellow becoming pinkish, 5.8–6.8 mm, tubes shorter than funnelform throats, lobes lanceolate, 0.9–1.2 mm, glabrous. <b>Cypselae</b> tan, obovoid to oblanceoloid, compressed, 3–3.9 mm, 4–6-nerved, faces glabrous or sparsely strigillose; pappi whitish to reddish, 5.3–6 mm. <b>2n</b> = 48.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Moist meadows, moist woodlands, dry, open, pine or oak woods, wooded roadsides
|elevation=400–1500 m
|distribution=Ala.;Ga.;N.C.;S.C.;Tenn.;Va.
|discussion=<p><i>Symphyotrichum retroflexum</i> is known only from the Appalachian Blue Ridges. It is possible that the species is an allopolyploid derived from members of subsections Cordifolii and <i>Symphyotrichum</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Symphyotrichum retroflexum
|author=
|authority=(Lindley ex de Candolle) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=Aster curtisii
|basionyms=Aster retroflexus
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Moist meadows, moist woodlands, dry, open, pine or oak woods, wooded roadsides
|elevation=400–1500 m
|distribution=Ala.;Ga.;N.C.;S.C.;Tenn.;Va.
|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_1138.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Symphyotrichum
|species=Symphyotrichum retroflexum
}}<!--

-->[[Category:Treatment]][[Category:Symphyotrichum sect. Symphyotrichum]]