|Named for its small, delicate, double white flowerheads with disk florets that fade to gray. Blooms early to late summer. Hardy and strong rhizome producing perennial with simple, toothed, lance-shaped dark green leaves. Reaches 24 inches tall and about 12 inches wide. This heat and drought tolerant perennial has a fiberous root system and can become invasive. Divide to maintain. Butterflies are attracted to this plant. Good cut flower that dries well too.