This sunflower species has rough, hairy stems, triangular-shaped leaves, and flower heads up to 6 inches wide. It can be between 2 and 10 feet tall.
The name "Helianthus" is from the Greek words "helios" for sun and "anthos" for flower. Native Americans were the first to domesticate sunflowers by selecting for larger and larger seeds. Annual sunflower is common throughout the US and Canada and grows best in full sun.