Helianthus petiolaris, commonly known as the prairie sunflower, is a stunning plant that is native to the prairie regions in North America. This tall, showy perennial has a stiff stem that can reach up to 8 feet tall and yellow flowers with dark centers. There are a number of synonyms for Helianthus petiolaris, such as Helianthus grosseserratus, Helianthus occidentalis, and Helianthus rigidus. Each of these names reflects the plant's characteristics, such as its large, sawtoothed leaves and its tendency to grow in western regions of North America. Regardless of the name, Helianthus petiolaris is an eye-catching addition to any garden or landscape.