GROWTH HABIT: The common sunflower is an annual, 1 to 10 feet tall.
LEAVES: Leaves alternate and are simple, rough, hairy, ovate or heart-shaped, with toothed edges.
STEMS: Stems are erect, simple to much branched and rough.
OTHER: Native to North America, the sunflower has been cultivated since pre-Columbian times for its edible seeds. They are common weeds of roadsides, fence rows, fields, pastures, and waste areas. Flowering from July to September.