Helianthus agrestis is a species of sunflower known by the common name Southeastern sunflower. It is found only in the States of Florida and Georgia in the southeastern United States. Helianthus agrestis is an annual herb sometimes as much as 200 cm (80 inches) tall. One plant can have as many as 15 flower heads, each with about 12 ray florets surrounding 50 or more disc florets. It grows in wet soil in marshes and pine flatwoods at elevations less than 50 meters (170 feet) elevation.