View source for Eupatorium ×pinnatifidum

{{Treatment/ID
|accepted_name=Eupatorium ×pinnatifidum
|accepted_authority=Elliott
|publications={{Treatment/Publication
|title=Sketch Bot. S. Carolina
|place=2: 295. 1823
|year=1823
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Eupatorium eugenei
|authority=Small
|rank=species
}} {{Treatment/ID/Synonym
|name=Eupatorium pectinatum
|authority=Small
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Eupatorium;Eupatorium ×pinnatifidum
|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 ×pinnatifidum]]</div></div>
|volume=Volume 21
|mention_page=page 463
|treatment_page=page 472
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 40–100+ cm. <b>Stems</b> (from short caudices) single, densely branched distally, puberulent throughout. <b>Leaves</b> opposite (proximal) or alternate (nodes often appearing leafy, lateral buds develop leaves without axis elongation); sessile; blades (usually 1–2-pinnately or ternately lobed) or lobes pinnately nerved or 1-nerved, linear, 20–100 × 0.5–1.5 mm, bases narrowly cuneate to attenuate, margins entire or serrate, apices acute, faces puberulent, gland-dotted. <b>Heads</b> in subcorymbiform to subpaniculiform arrays. <b>Phyllaries</b> 10–12 in 2–3 series, elliptic to oblong, 1–3.5 × 0.5–1 mm, apices acute to acuminate, shortly mucronate, abaxial faces puberulent, gland-dotted. <b>Florets</b> 7–9; corollas 2–2.5 mm. <b>Cypselae</b> 1–1.5 mm; pappi of 20–30 bristles 2.5–3 mm. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Oct.
|habitat=Dry to wet areas, roadsides, around ponds, open pine woods
|elevation=20–100 m
|distribution=Ala.;Fla.;La.;Miss.;S.C.;Tex.;Va.
|discussion=<p><i>Eupatorium ×pinnatifidum</i> has been suggested to represent a series of recurrent hybrids between <i>E. capillifolium</i> or <i>E. compositifolium</i> and <i>E. perfoliatum</i>; molecular data, in addition to confirming that this combination occurs, also show that <i>E. serotinum</i> rather than <i>E. perfoliatum</i> is the second parent in at least some plants included in <i>E. ×pinnatifidum</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Eupatorium ×pinnatifidum
|authority=Elliott
|rank=species
|parent rank=genus
|synonyms=Eupatorium eugenei;Eupatorium pectinatum
|basionyms=
|family=Asteraceae
|phenology=Flowering Aug–Oct.
|habitat=Dry to wet areas, roadsides, around ponds, open pine woods
|elevation=20–100 m
|distribution=Ala.;Fla.;La.;Miss.;S.C.;Tex.;Va.
|reference=None
|publication title=Sketch Bot. S. Carolina
|publication year=1823
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V19-20-21/V21_1181.xml
|tribe=Asteraceae tribe Eupatorieae
|genus=Eupatorium
|species=Eupatorium ×pinnatifidum
}}<!--

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