World of Weeds - Purple threeawn
Purple threeawn is a warm-season perennial grass native to Kansas and the Great Plains that can be a challenging weed in fields under long-term no-till management. This species may be found invading fields along with tumble windmillgrass and tumblegrass - other problematic native perennial grasses. It is rarely consumed by animals and is an indicator of overgrazing on rangelands.