View source for Helianthus argophyllus

{{Treatment/ID
|accepted_name=Helianthus argophyllus
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=2: 318. 1842
|year=1842
}}
|common_names=Silverleaf sunflower
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus argophyllus
|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 argophyllus]]</div></div>
|volume=Volume 21
|mention_page=page 142
|treatment_page=page 149
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 100–300 cm. <b>Stems</b> (silvery white) erect, usually tomentose or floccose. <b>Leaves</b> mostly cauline; mostly alternate; petioles 2–10 cm; blades ovate to lance-ovate, 15–25 × 10–20 cm, bases truncate to subcordate, margins entire or serrulate, abaxial faces usually floccose, sericeous, or tomentose, gland-dotted. <b>Heads</b> 1–5. <b>Peduncles</b> 2–8 cm. <b>Involucres</b> hemispheric, 20–30 mm diam. <b>Phyllaries</b> 20–35, ovate to lance-ovate, 15–18 × (2–)5–8 mm, apices long-attenuate, abaxial faces usually densely white-villous, gland-dotted. <b>Paleae</b> 10–11 mm, 3-toothed (apices glabrous or sparsely villous). <b>Ray</b> florets 15–20; laminae 20–30 mm. <b>Disc</b> florets 150+; corollas 6.5–7.5 mm, lobes reddish; anthers dark, appendages dark (style branches reddish). <b>Cypselae</b> 4–6 mm, glabrate; pappi of 2 aristate scales 2–2.7 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering late summer–fall.
|habitat=Open areas, sandy soils
|elevation=0–30+ m
|distribution=Fla.;N.C.;Tex.;introduced in South America (Argentina);Africa;Australia.
|discussion=<p><i>Helianthus argophyllus</i> hybridizes naturally with <i>H. annuus</i>.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Helianthus argophyllus
|author=
|authority=Torrey & A. Gray
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering late summer–fall.
|habitat=Open areas, sandy soils
|elevation=0–30+ m
|distribution=Fla.;N.C.;Tex.;introduced in South America (Argentina);Africa;Australia.
|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/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_346.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus argophyllus
}}<!--

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