Helianthus nuttallii

Helianthus nuttallii
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[1]
  • 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.[2]

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.[3][4]

Subspecies[2][3][1]

References

This article is issued from Wikipedia - version of the Saturday, July 04, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.