Helianthus (genus)

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  12. Helianthus
Scope note
Genus of flowering plant native primarily to North and South America. The common sunflower is an annual herb with a rough hairy stem 1–4.5 metres (3–15 feet) high, broad, coarsely toothed, rough leaves 7.5–30 cm (3–12 inches) long, and heads of flowers 7.5–15 cm wide in wild specimens and often 30 cm or more in cultivated types. The disk flowers are brown, yellow, or purple; the ray flowers are yellow. The oval hairy leaves are arranged in spirals. The sunflower plant is valuable from an economic as well as from an ornamental point of view.
Helianthus
Accepted term: 02-Dec-2024