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Helianthus nuttallii subsp. nuttallii

Helianthus nuttallii subsp. nuttallii  
Family: Asteraceae
Nuttall's sunflower
[Helianthus fascicularis Greene, moreHelianthus giganteus f. verticillatus Lakela, Helianthus nuttallii subsp. canadensis R.W. Long, Helianthus nuttallii subsp. coloradensis (Cockerell) R.W. Long]
Helianthus nuttallii subsp. nuttallii image
Tony Frates
  • FNA
  • Resources
Edward E. Schilling in Flora of North America (vol. 21)
Plants usually 200-300 cm. Leaves mostly alternate; blades narrowly to broadly lanceolate, apices acute to acuminate, abaxial faces hispid to hispidulous. Phyllaries: abaxial faces ± glabrate or sparsely hairy (longer hairs 0.5-1 mm).

Flowering late summer-fall. Moist open places, ditches, roadsides; (300-)1200-2700 m; Alta., B.C., Man., Sask.; Ariz., Calif., Colo., Idaho, Kans., Mo., Mont., Nebr., Nev., N.Mex., N.Dak., Okla., Oreg., S.Dak., Utah, Wash., Wyo.

Plants in the Dakotas and south-central and eastern Canada are intermediate between subsp. nuttallii and subsp. rydbergii and were placed by R. W. Long (1966) in subsp. canadensis; C. B. Heiser et al. (1969) returned this to subsp. nuttallii with the comment that it was hardly equivalent to other subspecies that they included in their treatment. The name H. ×luxurians may refer to hybrids between subsp. nuttallii and H. giganteus (Heiser et al.).

Helianthus nuttallii subsp. nuttallii
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Helianthus nuttallii subsp. nuttallii image
Tony Frates
Helianthus nuttallii subsp. nuttallii image
Tony Frates
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
Helianthus nuttallii subsp. nuttallii image
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Helianthus nuttallii subsp. nuttallii image
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Helianthus nuttallii subsp. nuttallii image
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