View source for Helianthus microcephalus

{{Treatment/ID
|accepted_name=Helianthus microcephalus
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=2: 329. 1842
|year=1842
}}
|common_names=Woodland sunflower
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus microcephalus
|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 microcephalus]]</div></div>
|volume=Volume 21
|mention_page=page 145, 157, 158, 159
|treatment_page=page 163
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 20–200 cm (with crown buds). <b>Stems</b> erect, glabrous. <b>Leaves</b> cauline; opposite or alternate; petioles 0.3–3 cm; blades (greenish, at least abaxially, 3-nerved at bases) lanceolate, 7.2–15.5 × 1.3–4 cm, bases cuneate, margins entire or serrate, abaxial faces tomentulose, densely gland-dotted. <b>Heads</b> (1–)3–15+. <b>Peduncles</b> 1–3(–8) cm. <b>Involucres</b> cylindric, 5–7 mm diam. <b>Phyllaries</b> 12–17, lance-linear, 3–6.5 × 1.5–2.5 mm, (margins ciliate) apices acuminate, abaxial faces glabrate, not gland-dotted. <b>Paleae</b> 5–7 mm, 3-toothed (apices hairy). <b>Ray</b> florets 5–8; laminae 10–14 mm. <b>Disc</b> florets 15–22; corollas 4–5.5 mm, lobes yellow; anthers dark, appendages dark. <b>Cypselae</b> 3.5–4.2 mm, glabrous; pappi of 2 aristate scales 1.5–2.2 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Open woodlands, shaded roadsides
|elevation=10–900 m
|distribution=Ala.;Ark.;Conn.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;La.;Md.;Mich.;Minn.;Miss.;N.J.;N.C.;Ohio;Pa.;S.C.;Tenn.;Va.;W.Va.
|discussion=<p><i>Helianthus microcephalus</i> is distinguished by its relatively small heads, which have relatively few phyllaries, ray florets, and disc florets, as well as the usually tomentulose abaxial faces of the leaves. Hybrids with <i>H. divaricatus</i> are known.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus microcephalus
|authority=Torrey & A. Gray
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Open woodlands, shaded roadsides
|elevation=10–900 m
|distribution=Ala.;Ark.;Conn.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Ky.;La.;Md.;Mich.;Minn.;Miss.;N.J.;N.C.;Ohio;Pa.;S.C.;Tenn.;Va.;W.Va.
|reference=None
|publication title=Fl. N. Amer.
|publication year=1842
|special status=Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_392.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus microcephalus
}}<!--

-->[[Category:Treatment]][[Category:Helianthus]]