View source for Eupatorium serotinum

{{Treatment/ID
|accepted_name=Eupatorium serotinum
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 100. 1803
|year=1803
}}
|common_names=Lateflowering thoroughwort
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Eupatorium;Eupatorium serotinum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Eupatorieae]]</div><div class="higher-taxon"><small>genus</small>[[Eupatorium]]</div><div class="higher-taxon"><small>species</small>[[Eupatorium serotinum]]</div></div>
|volume=Volume 21
|mention_page=page 463, 465, 466, 468, 470, 471, 472, 474
|treatment_page=page 473
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 50–150+ cm. <b>Stems</b> (from short caudices) single, sparsely to densely branched distally, pubescent throughout (sometimes reddish to purplish). <b>Leaves</b> opposite; petiolate (petioles 10–25 mm); blades ± 3-nerved, lanceolate, 20–90+ × 5–40 mm, bases rounded to slightly oblique, margins entire or serrate, apices acute, faces puberulent, gland-dotted. <b>Heads</b> in corymbiform arrays. <b>Phyllaries</b> 8–12 in 1–2 series, elliptic to oblong, 1–3 × 0.5–1 mm, apices slightly rounded to acute, abaxial faces puberulent, gland-dotted. <b>Florets</b> 9–15; corollas 2.5–3 mm. <b>Cypselae</b> 1–1.5 mm; pappi of 20–30 bristles 2–2.5 mm. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Moist or dry, open sites, roadsides
|elevation=10–400+ m
|distribution=Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va.;Wis.
|discussion=<p><i>Eupatorium serotinum</i> has a wide distribution and is often abundant where it occurs. It includes only sexual, diploid populations. It is known to hybridize with <i>E. perfoliatum</i>. An introduction of <i>E. serotinum</i> in southeastern Ontario apparently is local and may not have persisted.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eupatorium serotinum
|authority=Michaux
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Moist or dry, open sites, roadsides
|elevation=10–400+ m
|distribution=Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va.;Wis.
|reference=None
|publication title=Fl. Bor.-Amer.
|publication year=1803
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_1188.xml
|tribe=Asteraceae tribe Eupatorieae
|genus=Eupatorium
|species=Eupatorium serotinum
}}<!--

-->[[Category:Treatment]][[Category:Eupatorium]]