Echinacea (Coneflower) has cone-shaped centers surrounded by flat petals that typically hang down to form a cone-shape. This U.S native perennial prefers full to part sun and will tolerate extreme heat, wet and clay soils. A clump-former, Echinacea may self-sow, if not deadheaded. Echinacea blooms from late spring to fall and is a summer showstopper in perennial gardens. Coneflower is attractive to butterflies, hummingbirds and other pollinators. The seed heads are a favorite of gold finches. Hardy to zones 4-9.