Helianthus divaricatus (woodland sunflower)

Woodland sunflower is one of the earlier flowering helianthuses. Its showy yellow flowers bloom from July through September. It prefers part shade and dry soil but will tolerate well-drained soil that's medium in moisture. It tolerates drought. Woodland sunflower can grow to 2–6' tall. Has a vigorous spreading habit in a good site. 

Woodland sunflower is native to central and eastern North America. It commonly occurs in dry, relatively open sites. Attracts birds and butterflies.