Varieties: Delar A long-lived, evergreen, perennial forb growing 2 to 25 inches. The flowers are closely packed in head- like to elongate spikes 3 to 8 inches long, the lower ones male and the upper ones female, with no petals and about 12 stamens. The purple thumb-sized seed head blooms May to July. Prefers full to partial sun, well-drained soils and infertile to disturbed soils. Is cold and drought tolerance. Distributed primarily throughout the West and Northeast.