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. 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.
Helianthus nuttallii
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