View source for Helianthus hirsutus

{{Treatment/ID
|accepted_name=Helianthus hirsutus
|accepted_authority=Rafinesque
|publications={{Treatment/Publication
|title=Ann. Nat.
|place=1: 14. 1820
|year=1820
}}
|common_names=Hairy sunflower
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthus hirsutus var. stenophyllus
|authority=Torrey & A. Gray
|rank=variety
}} {{Treatment/ID/Synonym
|name=Helianthus hirsutus var. trachyphyllus
|authority=Torrey & A. Gray
|rank=variety
}} {{Treatment/ID/Synonym
|name=Helianthus stenophyllus
|authority=
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus hirsutus
|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 hirsutus]]</div></div>
|volume=Volume 21
|mention_page=page 147, 158, 159
|treatment_page=page 157
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 100–200 cm (rhizomatous). <b>Stems</b> erect, hirsute. <b>Leaves</b> cauline; mostly opposite; petioles 0.4–2 cm; blades (3-nerved from bases) lanceolate to ovate, 6.5–18 × 1–8 cm, bases truncate to broadly rounded or cuneate, margins subentire to serrate (flat), abaxial faces ± hirsute, gland-dotted (adaxial not gland-dotted). <b>Heads</b> 1–7. <b>Peduncles</b> 1–5 cm. <b>Involucres</b> hemispheric, 10–25 mm diam. <b>Phyllaries</b> 18–25 (usually loose, spreading, not reflexed), lanceolate, 7–12 × 2.5–3.5 mm, (margins ciliate) apices acute to short-acuminate, abaxial faces not gland-dotted. <b>Paleae</b> 7–10 mm, 3-toothed (apices yellowish, hairy). <b>Ray</b> florets 10–15; laminae 15–20 mm. <b>Disc</b> florets 40+; corollas 5.5–6.5 mm, lobes yellow; anthers dark brown or black, appendages dark or yellowish. <b>Cypselae</b> 4–4.5 mm, glabrate or distally puberulent; pappi of 2 aristate scales 2.5–3.2 mm. <b>2n</b> = 68.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Dry, open sites, woodland edges, roadsides
|elevation=10–900+ m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;Tenn.;Tex.;Va.;W.Va.;Wis.;Mexico (Coahuila;Nuevo León).
|discussion=<p><i>Helianthus hirsutus</i> is distinguished from <i>H. strumosus</i> by hairy stems and usually yellow (as opposed to dark) anther appendages, and from <i>H. divaricatus</i> by petioles and leaf blades 3-nerved distal to bases. Mexican plants of <i>H. hirsutus</i> are sometimes labeled with the synonymous H. leptocaulis (S. Watson) S. F. Blake, and plants from Mexico and the southwestern United States often have leaf bases cuneate rather than truncate.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus hirsutus
|authority=Rafinesque
|rank=species
|parent rank=genus
|synonyms=Helianthus hirsutus var. stenophyllus;Helianthus hirsutus var. trachyphyllus;Helianthus stenophyllus
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Dry, open sites, woodland edges, roadsides
|elevation=10–900+ m
|distribution=Ont.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mich.;Minn.;Miss.;Mo.;Nebr.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;Tenn.;Tex.;Va.;W.Va.;Wis.;Mexico (Coahuila;Nuevo León).
|reference=None
|publication title=Ann. Nat.
|publication year=1820
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V21_375.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus hirsutus
}}<!--

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