This is a Heliopsis and belong to the Asteraceae family. These are a perennial flower for zones 3-8 and bloom from June until October. They are also known as False Sunflower, Smooth Oxeye, or Smooth Sunflower. Ox-Eyed Sunflower prefer full sun and attracts pollinators, but are deer resistant. These flowers get to be anywhere from 3 feet (ca. 91 centimeters) to 6 feet (ca. 183 centimeters) tall. The flowers are yellow with a yellow center to them. These will grow in almost any soil, but really thrives in moist and heavy soil like clay. If you like these flowers, you may also like Black-Eyed Susan Flowers .