View source for Helianthus nuttallii

{{Treatment/ID
|accepted_name=Helianthus nuttallii
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=2: 324. 1842
|year=1842
}}
|common_names=Nuttall’s sunflower;hélianthe de Nuttall
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus nuttallii
|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 nuttallii]]</div></div>
|volume=Volume 21
|mention_page=page 146, 147, 165
|treatment_page=page 166
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 100–400 cm (rhizomatous). <b>Stems</b> (usually yellow-brown or greenish, sometimes glaucous) erect, glabrous, hispid, ± hirsute, or scabrous. <b>Leaves</b> cauline; all or mostly opposite to mostly alternate; petioles 0.5–1.5 cm; blades light to dark green, 3-nerved (distal to bases) ± lanceolate to ± ovate, 4–20 × 0.8–4 cm, bases cuneate, margins entire or ± serrate (flat), abaxial faces hispid to hispidulous or tomentulose to villous-tomentose, gland-dotted. <b>Heads</b> 1–6. <b>Peduncles</b> 1–18 cm. <b>Involucres</b> hemispheric, 10–20 mm diam. <b>Phyllaries</b> 30–38 (loose, spreading), lanceolate to lance-ovate, 8–16 × 1.5–3 mm, (margins ciliate) apices acute to acuminate, abaxial faces usually ± strigose, rarely glabrate, not gland-dotted. <b>Paleae</b> 8–12 mm, 3-toothed. <b>Ray</b> florets 10–21; laminae 20–25 mm (abaxial faces not gland-dotted). <b>Disc</b> florets 60+; corollas 5–7 mm, lobes yellow; anthers dark brown to black, appendages yellow. <b>Cypselae</b> 3–5 mm, glabrate; pappi of 2 aristate scales 2.2–4.5 mm plus 0–2 lanceolate scales 0.5–1 mm. <b>2n</b> = 34 (subspecies unknown).</span><!--

-->{{Treatment/Body
|distribution=Alta.;B.C.;Man.;Ont.;Que.;Sask.;Ariz.;Calif.;Colo.;Idaho;Iowa;Kans.;Minn.;Mo.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Okla.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
|discussion=<p>Subspecies 3 (3 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves: abaxial faces tomentulose to villous-tomentose; phyllaries densely hairy (longer hairs 1+ mm)
|[[Helianthus nuttallii subsp. parishii|Helianthus nuttallii subsp. parishii]]
|-id=key-0-1
|1
|Leaves: abaxial faces hispid to hispidulous; phyllaries ± glabrate (longer hairs 0.5–1 mm).
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Plants usually 200–300 cm; leaves mostly alternate, blades narrowly to broadly lanceolate,apices acute to acuminate
|[[Helianthus nuttallii subsp. nuttallii|Helianthus nuttallii subsp. nuttallii]]
|-id=key-0-2
|2
|Plants usually 100–250 cm; leaves all or mostly opposite, blades lanceolate to nearly ovate, apices acute to obtuse
|[[Helianthus nuttallii subsp. rydbergii|Helianthus nuttallii subsp. rydbergii]]
|}
</div></div><!--

-->{{#Taxon:
name=Helianthus nuttallii
|authority=Torrey & A. Gray
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=Alta.;B.C.;Man.;Ont.;Que.;Sask.;Ariz.;Calif.;Colo.;Idaho;Iowa;Kans.;Minn.;Mo.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Okla.;Oreg.;S.Dak.;Utah;Wash.;Wyo.
|reference=None
|publication title=Fl. N. Amer.
|publication year=1842
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V21_402.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus nuttallii
}}<!--

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[[Category:Treatment]]
[[Category:Helianthus]]
[[Category:Revision Pending]]