|Clump-forming and fragrant, 'Moonwalker' is a carefree and generously blooming perennial for summer and early fall. Reaches 24 inches tall and about as wide. Leaves are dark green, linear and pinnatifid. Flowerheads form flat corymbs 4 to 6 inches across in yellow with copper tinges. Flowers fade with age. 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.