View source for Helianthus grosseserratus

{{Treatment/ID
|accepted_name=Helianthus grosseserratus
|accepted_authority=M. Martens
|publications={{Treatment/Publication
|title=Index Seminum (Louvain)
|place=1839: unpaged. 1839
|year=1839
}}
|common_names=Sawtooth sunflower;hélianthe à grosses dents
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthus instabilis
|authority=E. Watson
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus grosseserratus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Helianthinae]]</div><div class="higher-taxon"><small>genus</small>[[Helianthus]]</div><div class="higher-taxon"><small>species</small>[[Helianthus grosseserratus]]</div></div>
|volume=Volume 21
|mention_page=page 146, 166
|treatment_page=page 165
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 100–400(–500) cm (rhizomatous). <b>Stems</b> erect, glabrous proximally, distally glabrate, scabrellous, or strigillose (glaucous). <b>Leaves</b> cauline; opposite (proximal) or alternate; petioles (1–)2–5 cm; blades (light to dark green, 3-nerved distal to bases) lanceolate to lance-ovate, 10–32 × (1.2–)4–9 cm, bases cuneate, margins usually coarsely to shallowly serrate, rarely subentire (flat), abaxial faces puberulent to tomentulose, gland-dotted. <b>Heads</b> 3–15+. <b>Peduncles</b> 0.3–10 cm. <b>Invo</b>-lucres broadly hemispheric, 15–25 mm diam. <b>Phyllaries</b> 25–30 (loose, spreading), lance-linear, 10–14 × 1.5–2.5 mm (subequal), (margins ± ciliate) apices attenuate, abaxial faces glabrous or puberulent, not gland-dotted. <b>Paleae</b> 7–8 mm, entire or 3-toothed (apices acuminate, ± hairy). <b>Ray</b> florets 14–20; laminae 23–40 mm. <b>Disc</b> florets 100+; corollas 5–6 mm, lobes yellow; anthers dark brown to black, appendages yellow. <b>Cypselae</b> 3–4 mm, glabrate; pappi of 2 aristate scales 1.9–2.5 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Dry to wet prairies, other open sites
|elevation=10–300+ m
|distribution=Ont.;Que.;Ark.;Conn.;Del.;D.C.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;Tex.;Va.;Wash.;W.Va.;Wis.
|discussion=<p><i>Helianthus grosseserratus</i> is native to midwestern North America and has spread as a roadside weed into other areas, such as New England and the southeastern United States. It is introduced in Canada. Hybrids between <i>H. maximiliani</i> and <i>H. grosseserratus</i> are known as H. ×intermedius R. W. Long (R. W. Long 1954; Long 1966). Hybrids of <i>H. grosseserratus</i> with <i>H. salicifolius</i> have been described as H. kellermannii Britton (Long 1955), and those with <i>H. mollis</i> as H. brevifolius E. Watson (R. C. Jackson and A. T. Guard 1957b).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus grosseserratus
|authority=M. Martens
|rank=species
|parent rank=genus
|synonyms=Helianthus instabilis
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Dry to wet prairies, other open sites
|elevation=10–300+ m
|distribution=Ont.;Que.;Ark.;Conn.;Del.;D.C.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Pa.;S.Dak.;Tenn.;Tex.;Va.;Wash.;W.Va.;Wis.
|reference=None
|publication title=Index Seminum (Louvain)
|publication year=1839
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_399.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus grosseserratus
}}<!--

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