View source for Helianthus divaricatus

{{Treatment/ID
|accepted_name=Helianthus divaricatus
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 906. 1753
|year=1753
}}
|common_names=Woodland sunflower
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthus divaricatus var. angustifolius
|authority=Kuntze
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus divaricatus
|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 divaricatus]]</div></div>
|volume=Volume 21
|mention_page=page 145, 158, 163, 165
|treatment_page=page 157
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 20–150 cm (rhizomatous). <b>Stems</b> erect, usually glabrous, rarely ± hairy (often glaucous). <b>Leaves</b> cauline; opposite; sessile; blades (light to dark green, sometimes whitish abaxially, 3-nerved at bases) lanceolate to lance-ovate, 6–15 × 1–5 cm, bases rounded to cordate, margins subentire to serrate, abaxial faces sparsely hispid to hispidulous, gland-dotted. <b>Heads</b> 1–10. <b>Peduncles</b> 0.5–9 cm. <b>Involucres</b> hemispheric, 10–15 mm diam. <b>Phyllaries</b> 18–25, lanceolate, lance-linear, or lance-ovate, 6–12 × 2–2.5 mm, (margins ciliate) apices acuminate to attenuate, abaxial faces hispidulous to glabrate, not gland-dotted. <b>Paleae</b> 5–8 mm, 3-toothed (apices ciliate). <b>Ray</b> florets 8–12; laminae 15–30 mm. <b>Disc</b> florets 40+; corollas 4.2–5.5 mm, lobes yellow; anthers usually dark brown to black, appendages yellow. <b>Cypselae</b> 3–3.6 mm, glabrate; pappi of 2 aristate scales 2.2–2.5 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering summer–early fall.
|habitat=Dry, open sites
|elevation=10–900+ m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Vt.;Va.;W.Va.;Wis.
|discussion=<p>One of the earlier flowering perennial <i>Helianthus</i>, <i>H. divaricatus</i> resembles the tetraploid <i>H. hirsutus</i> but differs by its usually glabrous and often glaucous stems, sessile or subsessile leaves, and smaller reproductive organs (disc corollas, paleae, cypselae). Plants from the Ozark region of Arkansas have larger leaves and heads and may represent a polyploid form of <i>H. divaricatus</i>. Natural hybrids with <i>H. microcephalus</i> have been named H. glaucus Small (D. M. Smith and A. T. Guard 1958). Hybrids with other species differ from <i>H. divaricatus</i> in having short but distinct petioles, hairy stems, leaves with more rounded bases, and primary lateral leaf veins diverging in a subopposite manner distal to bases, rather than being strictly opposite and basal.</p>
|tables=
|references=
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-->{{#Taxon:
name=Helianthus divaricatus
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Helianthus divaricatus var. angustifolius
|basionyms=
|family=Asteraceae
|phenology=Flowering summer–early fall.
|habitat=Dry, open sites
|elevation=10–900+ m
|distribution=Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;La.;Maine;Md.;Mass.;Mich.;Miss.;Mo.;N.H.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;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_374.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus divaricatus
}}<!--

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