View source for Populus heterophylla

{{Treatment/ID
|accepted_name=Populus heterophylla
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 1034. 1753
|year=1753
}}
|common_names=Swamp or downy poplar
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Salicaceae;Populus;Populus heterophylla
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Salicaceae]]</div><div class="higher-taxon"><small>genus</small>[[Populus]]</div><div class="higher-taxon"><small>species</small>[[Populus heterophylla]]</div></div>
|volume=Volume 7
|mention_page=page 5, 7, 10, 11, 17, 21
|treatment_page=page 12
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>to 28 m, 12 dm diam.; not obviously heterophyllous. <b>Bark</b> reddish brown to brownish gray, deeply furrowed. <b>Branchlets</b> reddish brown, becoming grayish by third year, round to 5-angled, 3–6 mm diam., very coarse, thinly tomentose to glabrate. <b>Winter</b> buds reddish brown, pubescent, slightly resinous; terminal buds 4–7 mm; flowering buds separated on branchlets, 4–7 mm. <b>Leaves</b>: petiole round distally, (1–)4–8(–12) cm, 1/2 blade length, (tomentose to glabrate); blade ovate, (3.5–)9–20(–24) × (3.5–)7.5–12.5(–19) cm, w/l = 2/3–3/4, base deeply cordate to subsagittate, basilaminar glands 0 or 2, round, margins not translucent, not ciliate, apex obtuse to apiculate, abaxial surface pale green, pubescent to partly glabrate, retaining tomentum at least basally and on midvein, adaxial dark green, glabrous; preformed and neoformed blade margins finely and unevenly crenate-serrate throughout, teeth 30–60 on each side, sinuses 0.3–1 mm deep. <b>Catkins</b> sparsely 10–15(–45)-flowered, 4.5–8(–18 in fruit) cm; floral bract apex deeply cut, not ciliate (pubescent abaxially). <b>Pedicels</b> (1–)5–10(–18 in fruit) mm. <b>Flowers</b>: discs (caducous), cup-shaped, not obviously oblique, toothed, 1.5–2.5(–4) mm diam.; stamens 15–35; anthers apiculate; ovary 3-carpelled, ovoid to spherical; stigmas 2–4, convoluted, expanded, erect. <b>Capsules</b> ovoid, 8–14 mm, glabrous, 3-valved. <b>Seeds</b> 6–9 per placenta.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr; fruiting May–Jun.
|habitat=Nyssa-Taxodium swamps, drainage ditches, natural and artificial wet depressions, coastal plains, central lowlands, piedmont along major streams
|elevation=0-200(-400) m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Ky.;La.;Md.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;S.C.;Tenn.;Va.
|discussion=<p><i>Populus heterophylla</i> is widespread and uncommon in most of its range, which is entirely included within that of <i>P. deltoides</i>. Reports of swamp poplars from upland habitats are based on misidentified sucker shoots of <i>P. grandidentata</i>. Hybrids of <i>P. heterophylla</i> and <i>P. deltoides</i> are found in disturbed habitats, such as drainage ditches. Hybrids have glabrous leaves more elongate than those of <i>P. deltoides</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Populus heterophylla
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Salicaceae
|phenology=Flowering Apr; fruiting May–Jun.
|habitat=Nyssa-Taxodium swamps, drainage ditches, natural and artificial wet depressions, coastal plains, central lowlands, piedmont along major streams
|elevation=0-200(-400) m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Ky.;La.;Md.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;S.C.;Tenn.;Va.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_3.xml
|genus=Populus
|species=Populus heterophylla
}}<!--

-->[[Category:Treatment]][[Category:Populus]]