Helianthus praetermissus is a species of sunflower native to the central United States. It is a perennial herbaceous plant that can grow up to 6 feet (1.8 meters) tall and 3 feet (0.9 meters) wide. The leaves are alternate, simple, and ovate to lanceolate in shape. The flowers are bright yellow and have a diameter of 2 to 3 inches (5 to 7.6 cm).