View source for Symphyotrichum praealtum

{{Treatment/ID
|accepted_name=Symphyotrichum praealtum
|accepted_authority=(Poiret) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 289. 1995
|year=1995
}}
|common_names=Willowleaf or willow aster
|basionyms={{Treatment/ID/Synonym
|name=Aster praealtus
|authority=Poiret
}} {{Treatment/ID/Synonym
|name=Aster salicifolius
|authority=Aiton
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Symphyotrichum;Symphyotrichum praealtum
|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 praealtum]]</div></div>
|volume=Volume 20
|mention_page=page 475, 477, 501, 509, 516, 522
|treatment_page=page 521
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>(10–)50–150(–200) cm, colonial; fleshy long-rhizomatous. <b>Stems</b> 1, erect to ascending (stout, ± glaucous or reddish), glabrate to moderately hispidulous-hirsute (mostly in lines) distally. <b>Leaves</b> thick, firm, margins often revolute, scabrous, apices mucronate, abaxial faces glabrous, vein areoles conspicuous, ± isodiametric, adaxial waxy, glabrate to strigose, ± scabrous (distal cauline with axillary leaf clusters, sometimes becoming branches); basal withering by flowering, petiolate to subpetiolate (petioles winged, bases sheathing, ciliate), blades spatulate, 40–70 × 10–25 mm, bases attenuate, margins entire to shallowly serrate, apices rounded to obtuse; proximal cauline withering by flowering, sessile (subpetiolate), blades elliptic or lanceolate to oblanceolate or linear-lanceolate, 40–100(–150) × 3–18 mm, progressively reduced distally, bases cuneate, often slightly rounded, apices acute to attenuate, callus-pointed, abaxial faces scabrellous, adaxial glabrous or ± puberulent; distal sessile, blades ovate or elliptic-lanceolate to lanceolate or linear, 10–85 × 2–17 mm, progressively reduced distally, bases cuneate, margins entire, apices acute or obtuse, callus-pointed. <b>Heads</b> in ample, foliaceous, usually dense, paniculiform arrays, branches ascending to spreading, ± racemiform. <b>Peduncles</b> 0.3–2 cm, ± pilose, bracts 5–12+, ascending or recurved-spreading, lance-elliptic to lanceolate or linear-lanceolate, foliaceous, distal closely subtending heads, not grading into phyllaries. <b>Involucres</b> campanulate, (4–)5–7(–8) mm. <b>Phyllaries</b> in 4–6 series, appressed, oblong-lanceolate to linear (innermost) (outer sometimes ± foliaceous), unequal, bases indurate 1/2–3/4, margins scarious, erose, hyaline, sparsely ciliolate (often ciliate basally), green zones lanceolate to lance-rhombic, apices sometimes spreading, acute to acuminate, mucronate, often reddish purple apically, faces glabrous. <b>Ray</b> florets (6–)20–35; corollas pale blue-violet to lavender or rose-purple, rarely white, laminae 5–10(–12) × 1–1.7 mm. <b>Disc</b> florets 20–30(–35+); corollas cream or light yellow turning pinkish purple, 4–6.5 mm, tubes shorter than narrowly funnelform throats, lobes lanceolate, 0.5–1.3 mm. <b>Cypselae</b> purple or stramineous with purple, obovoid, sometimes ± compressed, 1.5–2 mm, 4–5-nerved, faces thinly strigillose; pappi white, 4–6.5 mm. <b>2n</b> = 32, 48, 64.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Wet, loamy soils, wet prairies or meadows, lake and stream shores, oak savannas, open woods or thickets, fields, moist banks, ditches, roadsides, recent clearings
|elevation=0–400+ m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;Ohio;Okla.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Va.;W.Va.;Wis.;Mexico (Chihuahua;Coahuila;Nuevo Léon);introduced in Europe.
|discussion=<p><i>Symphyotrichum praealtum</i> was reported by H. R. Hinds (2000) as a possible introduced, non-persisting ephemeral in New Brunswick. The species is introduced in central Europe, where it has been confused with <i>S. lanceolatum</i> (J. C. Semple et al. 2002). A. G. Jones (1989) reported hybridization with <i>S. lanceolatum</i> and <i>S. firmum</i>.</p><!--
--><p>G. L. Nesom (1994b, 1997) and J. C. Semple et al. (2002) recognize several varieties within the species: var. praealtum [syn. <i>Aster</i> coerulescens de Candolle, A. praealtus var. coerulescens (de Candolle) A. G. Jones, A. praealtus var. imbricatior Wiegand] (2n = 32); var. angustior (Wiegand) G. L. Nesom (syn. A. praealtus var. angustior Wiegand) (2n = 64); var. nebraskense (Britton) G. L. Nesom (syn. A. praealtus var. nebraskensis Britton); var. subasperum (Lindley) G. L. Nesom [syn. A. praealtus var. subasper (Lindley) Wiegand, A. subasper Lindley]; and var. texicola (Wiegand) G. L. Nesom (syn. A. praealtus var. texicola Wiegand). Some of these varieties deserve recognition, but the validity of others needs confirmation.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Symphyotrichum praealtum
|author=
|authority=(Poiret) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=
|basionyms=Aster praealtus;Aster salicifolius
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Wet, loamy soils, wet prairies or meadows, lake and stream shores, oak savannas, open woods or thickets, fields, moist banks, ditches, roadsides, recent clearings
|elevation=0–400+ m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;Ohio;Okla.;Pa.;R.I.;S.Dak.;Tenn.;Tex.;Va.;W.Va.;Wis.;Mexico (Chihuahua;Coahuila;Nuevo Léon);introduced in Europe.
|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_1161.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Symphyotrichum
|species=Symphyotrichum praealtum
}}<!--

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