View source for Eupatorium petaloideum

{{Treatment/ID
|accepted_name=Eupatorium petaloideum
|accepted_authority=Britton
|publications={{Treatment/Publication
|title=Bull. Torrey Bot. Club
|place=24: 492. 1897
|year=1897
}}
|common_names=Showy white thoroughwort
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Eupatorium album var. petaloideum
|authority=(Britton) R. K. Godfrey ex D. B. Ward
}}
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Eupatorium;Eupatorium petaloideum
|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 petaloideum]]</div></div>
|volume=Volume 21
|mention_page=page 463
|treatment_page=page 471
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 30–70 cm. <b>Stems</b> (from short, stout rhizomes) single, branched distally, puberulent. <b>Leaves</b> usually opposite (distal sometimes alternate); sessile; blades pinnately nerved, elliptic to ovate, 20–80 × 10–30 mm, bases cuneate, margins serrate to crenate-serrate, apices rounded to acute, faces sparsely villous (abaxial), glabrate (adaxial), little, if at all, gland-dotted. <b>Heads</b> in corymbiform arrays. <b>Phyllaries</b> 9–15 in 2–4 series, linear, 4–10 × 0.6–1 mm, apices (white) acuminate to attenuate, strongly mucronate, abaxial faces glabrous, not gland-dotted. <b>Florets</b> (4–)5; corollas 3–3.5 mm. <b>Cypselae</b> 2.5–3 mm; pappi of 40–50 bristles 3.5–4 mm. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Sep.
|habitat=Upland scrub oak and longleaf pinewoods, fine textured, loamy soils
|elevation=20–100+ m
|distribution=Ala.;Fla.;Ga.;Miss.
|discussion=<p><i>Eupatorium petaloideum</i> is commonly combined with <i>E. album</i>; it has recently been separated as a distinct variety. V. I. Sullivan (1972) found the two taxa to be distinct chemically and to occupy different habitats. In both, the involucral bracts are white and long-acuminate or mucronate; those of <i>E. petaloideum</i> are almost entirely devoid of any pubescence including glands and those of <i>E. album</i> have both simple and glandular hairs.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Eupatorium petaloideum
|author=
|authority=Britton
|rank=species
|parent rank=genus
|synonyms=Eupatorium album var. petaloideum
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Sep.
|habitat=Upland scrub oak and longleaf pinewoods, fine textured, loamy soils
|elevation=20–100+ m
|distribution=Ala.;Fla.;Ga.;Miss.
|reference=None
|publication title=Bull. Torrey Bot. Club
|publication year=1897
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V19-20-21/V21_1179.xml
|tribe=Asteraceae tribe Eupatorieae
|genus=Eupatorium
|species=Eupatorium petaloideum
}}<!--

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