View source for Symphyotrichum prenanthoides

{{Treatment/ID
|accepted_name=Symphyotrichum prenanthoides
|accepted_authority=(Muhlenberg ex Willdenow) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 290. 1995
|year=1995
}}
|common_names=Crookedstem aster
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster prenanthoides
|authority=Muhlenberg ex Willdenow
|rank=species
|publication_title=Sp. Pl.
|publication_place=3: 2046. 1803
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Symphyotrichum;Symphyotrichum prenanthoides
|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 prenanthoides]]</div></div>
|volume=Volume 20
|mention_page=page 476, 501, 528
|treatment_page=page 527
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 20–90(–120) cm, colonial; long-rhizomatous. <b>Stems</b> 1(–3+), ascending to erect (usually flexuous, sometimes ± straight, sometimes stout, older often dark purple), glabrous proximally, moderately hirsute distally. <b>Leaves</b> thin, margins scabrous, apices mucronate, abaxial faces glabrous, midveins hispid to glabrate, adaxial scabrous; basal withering by flowering, petiolate (petioles slender or slightly winged, bases reddish, dilated, sheathing, ciliate), blades obovate to oblanceolate, 15–70 × 10–20 mm, bases attenuate, margins crenate-serrate, apices acute to obtuse; proximalmost cauline withering by flowering, proximal mostly persistent, petiolate to subpetiolate (petioles ± widely winged, bases dilated, strongly auriculate-clasping), blades ovate to lance-ovate or elliptic-lanceolate to oblanceolate, 80–160(–200) × 15–55 mm, progressively reduced distally, bases attenuate, margins sharply serrate (teeth mucronulate), apices acuminate to subcaudate; distal subpetiolate or sessile (petioles broadly winged, auriculate-clasping), blades oblanceolate to lanceolate, sometimes panduriform, 7–90 × 2–25 mm, progressively reduced distally, more sharply so on branches, bases attenuate (petiolate) or ± cuneate to auriculate-clasping and slightly constricted above auricles (panduriform), margins serrate or entire. <b>Heads</b> in broad, ± flat, corymbo-paniculiform arrays, branches often purplish, divaricate to ascending, slender. <b>Peduncles</b> (8–)10–40 mm, sparsely to densely hispid, bracts lanceolate to linear-lanceolate, 3–12 mm, somewhat grading into phyllaries. <b>Involucres</b> campanulate, 5–6 mm. <b>Phyllaries</b> in 4–6 series, oblong-lanceolate or -oblanceolate, slightly constricted near middle (outer) to linear-lanceolate or linear (inner), ± unequal (flexible), bases indurate 1/5–1/2, margins ± narrowly hyaline, scarious, erose, sometimes ciliolate distally, green zones lanceolate to linear-lanceolate (inner), often distally foliaceous, sometimes outer ± entirely so, apices spreading to ± squarrose, acute to acuminate, mucronulate, abaxial faces sparsely hirsutulous to glabrate or glabrous, adaxial glabrous or sparsely hirsutulous. <b>Ray</b> florets 17–25(–30); corollas usually lavender to blue, rarely white, laminae 7.5–12(–15) × 1–2 mm. <b>Disc</b> florets 39–50(–65); corollas cream colored or light yellow becoming purple or brown, 3.5–5 mm, tubes ± equaling campanulate to funnelform throats (thinly puberulent), lobes triangular, 0.5–1 mm. <b>Cypselae</b> dull purple or stramineous with purple streaks or purplish-tinged, cylindro-oblanceoloid to obovoid, ± compressed, 2–3(–3.5) mm, 4–6-nerved, faces sparsely to moderately strigillose; pappi sordid, 3.5–4.5 mm. <b>2n</b> = 32.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Moist or swampy grounds, woods, thickets, meadows, seeps, stream banks, roadsides
|elevation=100–1500 m
|distribution=Ont.;Conn.;Del.;D.C.;Ill.;Ind.;Iowa;Ky.;Md.;Mass.;Mich.;Minn.;N.J.;N.Y.;N.C.;Ohio;Pa.;Va.;W.Va.;Wis.
|discussion=<p><i>Symphyotrichum prenanthoides</i> is of conservation concern in Canada and in a number of states.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Symphyotrichum prenanthoides
|authority=(Muhlenberg ex Willdenow) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=
|basionyms=Aster prenanthoides
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Moist or swampy grounds, woods, thickets, meadows, seeps, stream banks, roadsides
|elevation=100–1500 m
|distribution=Ont.;Conn.;Del.;D.C.;Ill.;Ind.;Iowa;Ky.;Md.;Mass.;Mich.;Minn.;N.J.;N.Y.;N.C.;Ohio;Pa.;Va.;W.Va.;Wis.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1171.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Symphyotrichum
|species=Symphyotrichum prenanthoides
}}<!--

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