View source for Helianthus strumosus

{{Treatment/ID
|accepted_name=Helianthus strumosus
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 905. 1753
|year=1753
}}
|common_names=Rough sunflower;hélianthe scrofuleux
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthus montanus
|authority=E. Watson
|rank=species
}} {{Treatment/ID/Synonym
|name=Helianthus saxicola
|authority=Small
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus strumosus
|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 strumosus]]</div></div>
|volume=Volume 21
|mention_page=page 146, 158, 162
|treatment_page=page 159
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 100–200 cm (rhizomatous). <b>Stems</b> erect, glabrous or glabrate. <b>Leaves</b> cauline; mostly opposite, sometimes alternate (distal); petioles 1–3 cm; blades (light to dark green, 3-nerved distal to bases) lanceolate to lance-ovate or ovate, 7–18 × 2–10 cm, bases subcordate to ± cuneate, margins entire to ± serrate, abaxial faces glabrous or tomentulose, usually densely gland-dotted. <b>Heads</b> 3–15. <b>Peduncles</b> 1–9 cm. <b>Involucres</b> cylindric to hemispheric, 8–20 mm diam. <b>Phyllaries</b> 18–25 (erect, loose, or squarrose), lanceolate, 5.5–10 × 1.5–3 mm (equaling or slightly surpassing discs), (margins usually ciliate) apices acute to acuminate, abaxial faces glabrous or hispidulous, usually not gland-dotted. <b>Paleae</b> 5.3–6.5 mm, 3-toothed. <b>Ray</b> florets 10–20; laminae ca. 12–20(–30) mm. <b>Disc</b> florets 35+; corollas 5.5–6.5 mm, lobes yellow; anthers dark, appendages dark or reddish brown. <b>Cypselae</b> 4–5.5 mm, glabrate; pappi of 2 aristate scales (1–)2–2.5 mm. <b>2n</b> = 68, 102.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Woods, roadsides, prairies
|elevation=0–1500 m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.
|discussion=<p><i>Helianthus strumosus</i> is variable, particularly for leaf shape and indument; sufficient study has not been undertaken to evaluate whether regional forms deserve taxonomic recognition. Hybridization with other polyploids, including <i>H. decapetalus</i>, <i>H. hirsutus</i>, and <i>H. tuberosus</i>, further complicates the situation. It differs from <i>H. tuberosus</i> in having glabrous (or glabrate) stems and in lacking tubers.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus strumosus
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Helianthus montanus;Helianthus saxicola
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Woods, roadsides, prairies
|elevation=0–1500 m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;N.H.;N.J.;N.Y.;N.C.;N.Dak.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_380.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus strumosus
}}<!--

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