View source for Helianthus atrorubens

{{Treatment/ID
|accepted_name=Helianthus atrorubens
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 906. 1753
|year=1753
}}
|common_names=Purpledisc sunflower
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Helianthus atrorubens var. alsodes
|authority=Fernald
}} {{Treatment/ID/Synonym
|name=Helianthus sparsifolius
|authority=unknown
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus atrorubens
|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 atrorubens]]</div></div>
|volume=Volume 21
|mention_page=page 144, 157, 160, 161
|treatment_page=page 156
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 50–200 cm (with crown buds; nonflowering stems usually absent). <b>Stems</b> erect, proximally villous to strigoso-hispid, distally hispid or glabrate. <b>Leaves</b> mostly basal; opposite; petioles 4–25 cm (usually winged at least 1/2 their lengths); blades lanceolate to ovate, 7–26 × 3–10 cm, bases broadly cuneate to nearly truncate (often decurrent onto petioles), margins serrate to crenate, abaxial faces strigoso-hispid (hairs of midribs1+ mm), not gland-dotted (cauline to 8 pairs proximal to heads, ovate to elliptic, smaller). <b>Heads</b> (1–)3–15+. <b>Peduncles</b> 0.3–17 cm. <b>Involucres</b> broadly hemispheric, 9–16 mm diam. <b>Phyllaries</b> 15–22, broadly ovate to oblong, 7–9 × 4–5 mm, (margins ciliolate) apices obtuse to acute, sometimes mucronate, abaxial faces usually glabrous. <b>Paleae</b> 4–5.5 mm, ± 3-toothed to entire. <b>Ray</b> florets 10–15; laminae 15–22 mm (abaxial faces not gland-dotted). <b>Disc</b> florets 75+; corollas 4–6 mm, lobes reddish; anthers dark, appendages dark (style branches yellow). <b>Cypselae</b> 2.8–3 mm, glabrous or distally puberulent; pappi of 2 aristate scales 2.5–2.8 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Open mixed woods, roadsides
|elevation=0–900 m
|distribution=Ala.;Fla.;Ga.;Ky.;La.;N.J.;N.C.;S.C.;Tenn.;Va.
|discussion=<p><i>Helianthus atrorubens</i> and <i>H. silphioides</i> form a morphologically similar pair of species that share the distinctive feature of relatively broad, tightly appressed phyllaries with apices obtuse to acute. <i>Helianthus atrorubens</i> has a more easterly geographic distribution along the Piedmont and the Atlantic coastal plain and the southern Appalachian Mountains; distribution of <i>H. silphioides</i> is centered in the Ozark region. In general, <i>H. silphioides</i> differs in its usually well developed cauline leaves, and basal leaves with winged petioles that are less than half the total lengths. Involucres with phyllaries tightly appressed are also observed in <i>H. occidentalis</i> and <i>H. pauciflorus </i>subsp.<i> pauciflorus</i>, which differs in having the phyllary apices acute to acuminate as well as in usually having abaxial faces of leaves and ray laminae densely gland-dotted.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus atrorubens
|author=
|authority=Linnaeus
|rank=species
|parent rank=genus
|synonyms=Helianthus atrorubens var. alsodes;Helianthus sparsifolius
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Open mixed woods, roadsides
|elevation=0–900 m
|distribution=Ala.;Fla.;Ga.;Ky.;La.;N.J.;N.C.;S.C.;Tenn.;Va.
|reference=None
|publication title=Sp. Pl.
|publication year=1753
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_372.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus atrorubens
}}<!--

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