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
|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>Helianthus microcephalus 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 H. divaricatus are known.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Helianthus microcephalus
|author=
|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=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/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
}}<!--

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