Helianthus nuttallii

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Helianthus nuttallii
Helianthus nuttallii.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Helianthus
Species: H. nuttallii
Binomial name
Helianthus nuttallii
Torr. & A.Gray
Synonyms[2]
  • Helianthus fascicularis Greene
  • Helianthus parishii A.Gray, syn of subsp. parishii
  • Helianthus rydbergii Britton, syn of subsp. rydbergii

Helianthus nuttallii (Nuttall's sunflower) is a species of sunflower native to northern, central, and western North America, from Newfoundland west to British Columbia, south to Missouri, New Mexico, and California.[3]

Helianthus nuttallii is a herbaceous perennial plant growing to 50-400 cm (20-160 inches) tall. The leaves are opposite on the lower part of the stem, alternate higher up, narrow lanceolate, 8–20 cm (3.2-8.0 inches) long and 6–30 mm wide, with a rough texture. The flowers are yellow, produced in a flowerhead approximately 9 cm (3.6 inches) diameter with 10–20 ray florets and at least 60 disc florets; each stem bears one to a few flowerheads.[4][5]

Subspecies[3][4][2]

References

  1. ^ http://www.iucnredlist.org/details/20694327/0
  2. ^ a b The Plant List, Helianthus nuttallii Torr. & A.Gray
  3. ^ a b Germplasm Resources Information Network: Helianthus nuttallii
  4. ^ a b Jepson Flora: Helianthus nuttallii
  5. ^ Plants of British Columbia: Helianthus nuttallii
  6. ^ http://www.theplantlist.org/tpl1.1/record/gcc-22693
  7. ^ Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, editors. 2012. "The Jepson Manual: vascular plants of California", second edition. University of California press, Berkeley. ISBN 9780520253124. pp 344
  8. ^ Calflora taxon report, University of California, Helianthus nuttallii Torrey & A. Gray ssp. parishii (A. Gray) Heiser, Los Angeles sunflower, Parish's sunflower


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