Common Sunflower: Helianthus annuus (Synonyms: Helianthus annuus ssp. annuus, Helianthus annuus ssp. lenticularis) - Annual. Herbage harshly pubescent. Broad triangular leaf blades with slightly toothed margins. Leaf is a dull dark green. One single, stout stem bears several flower heads of numerous yellow ray flowers and a reddish brown central disk. 1-10 feet tall.
Bolander's Sunflower: Helianthus bolanderi -
Jerusalem Artichoke: Helianthus tuberosus - Escaped garden plant. Forms edible tubers. Garden escapees occasionally become established in the wild around old homesteads.