The most popular among sunflowers is the common sunflower (Helianthus annuus L.).

An excerpt from the article 15 facts about sunflower

This plant comes from North America and grows up to 3 meters high. Sunflower leaves are broad, coarsely toothed, rough, and usually alternate. At the top of a thick and stiff stem grows an inflorescence with a diameter of about 30 cm.