View source for Symphyotrichum pilosum

{{Treatment/ID
|accepted_name=Symphyotrichum pilosum
|accepted_authority=(Willdenow) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 289. 1995
|year=1995
}}
|common_names=Oldfield or frost weed or white oldfield or hairy or hairy white oldfield aster;aster poilu
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster pilosus
|authority=Willdenow
|rank=species
|publication_title=Sp. Pl.
|publication_place=3: 2025. 1803
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster ericoides var. pilosus
|authority=(Willdenow) Porter
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Symphyotrichum;Symphyotrichum pilosum
|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 pilosum]]</div></div>
|volume=Volume 20
|mention_page=page 467, 468, 495, 500, 512
|treatment_page=page 511
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>cespitose, (5–)20–120(–150+) cm; with stout, branched caudices, sometimes long-rhizomatous. <b>Stems</b> 1–5+, ascending to erect (straight, stout), glabrate to hirsuto-hispid or pilose, sometimes glabrous or hairy in lines (<i></i>var.<i> pringlei</i>). <b>Leaves</b> thin, margins ciliate, apices acute to acuminate, mucronate, faces glabrous or ± hirsute (particularly on abaxial midveins); basal withering by flowering (new vernal rosettes developing at flowering), petiolate to subpetiolate (petioles winged, ciliate, bases sheathing), blades oblanceolate or obovate to spatulate, 10–60 × 5–15 mm, bases attenuate, margins sparsely crenate-serrate (mostly apically), apices obtuse to rounded; proximal cauline usually deciduous at flowering (often with axillary clusters of small leaves), petiolate or subpetiolate to subsessile (petioles narrowly to broadly winged, clasping), blades elliptic-oblanceolate or -oblong to linear-lanceolate or -oblanceolate, 40–102 × 5–25 mm, progressively reduced distally, bases attenuate to cuneate, ± clasping, margins entire to serrate, softly ciliate, apices attenuate, hyaline-spinulose; distal sessile, blades lance-oblong to linear-lanceolate to linear or linear-oblanceolate or linear-subulate, 10–100 × 1–8 mm, progressively reduced distally, branch leaves abruptly smaller, bases cuneate, margins entire or serrulate. <b>Heads</b> in open, leafy, often pyramidal, paniculiform arrays, branches divaricate or branches 10 cm or less ascending, often arched and secund, sometimes racemiform. <b>Peduncles</b> 5–30(–50) mm, progressively shorter distally, glabrous or densely hispid, bracts 7–25+, appressed to ascending, sometimes ± spreading, linear to subulate, glabrate, ciliate or not, mucronate to apiculate, ± grading into phyllaries. <b>Involucres</b> campanulate to cylindro-campanulate, (2.5–)3.5–5.1(–6.5) mm. <b>Phyllaries</b> in 4–6 series, appressed or slightly spreading, oblong-lanceolate (outer) to linear (innermost) , unequal (rarely subequal), bases indurate 1/2–3/5, margins hyaline, scarious, erose, ± ciliolate distally, green zones lanceolate to lance-rhombic, apices acute or acuminate, involute, spinulose, faces glabrous or sparsely hirsutulous. <b>Ray</b> florets (10–)16–28(–38); corollas usually white, rarely pinkish or bluish, laminae (4–)5.4–7.5(–11) × (0.4–)0.8–1.3(–1.7) mm. <b>Disc</b> florets (13–)17–39(–67); corollas light yellow becoming reddish purple or brown, (2.5–)3–4.1(–5.5) mm, tubes much shorter than narrowly funnelform throats, lobes lanceolate, (0.4–)0.6–0.8(–1) mm. <b>Cypselae</b> whitish or gray, oblong-obovoid, sometimes ± compressed, 1–1.5 × 0.5–0.7 mm, 4–6-nerved, faces sparsely strigillose; pappi white, 3.5–4 mm.</span><!--

-->{{Treatment/Body
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Ala.;Ark.;Conn.;D.C.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;N.C.;N.H.;N.J.;N.Y.;Nebr.;Ohio;Okla.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Va.;Vt.;W.Va.;Wis.
|discussion=<p>Varieties 2 (2 in the flora).</p><!--
--><p>The ecology and cytogeography of <i>Symphyotrichum pilosum</i> were summarized by J. G. Chmielewski and J. C. Semple (2001b). The species is often confused with <i>S. ericoides</i>, which inhabits the same kinds of open, prairie-like habitats; the latter can be distinguished by its smaller heads and spine-tipped phyllary apices. Because of that, the name <i>Aster</i> ericoides has been misapplied often in floras and in the horticultural trade.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Stems sparsely to densely hirsute; leaves pilose; various substrates
|[[Symphyotrichum pilosum var. pilosum|Symphyotrichum pilosum var. pilosum]]
|-id=key-0-1
|1
|Stems glabrous; leaves glabrous or glabrate; mainly on calcareous substrates
|[[Symphyotrichum pilosum var. pringlei|Symphyotrichum pilosum var. pringlei]]
|}
</div></div><!--

-->{{#Taxon:
name=Symphyotrichum pilosum
|authority=(Willdenow) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=Aster ericoides var. pilosus
|basionyms=Aster pilosus
|family=Asteraceae
|distribution=B.C.;N.B.;N.S.;Ont.;Que.;Ala.;Ark.;Conn.;D.C.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Mass.;Md.;Mich.;Minn.;Miss.;Mo.;N.C.;N.H.;N.J.;N.Y.;Nebr.;Ohio;Okla.;Pa.;R.I.;S.C.;S.Dak.;Tenn.;Va.;Vt.;W.Va.;Wis.
|reference=None
|publication title=Phytologia
|publication year=1995
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V20_1141.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Symphyotrichum
|species=Symphyotrichum pilosum
}}<!--

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