Spider' coneflower (Echinacea PRIMA 'Spider') has ... It's what you would expect from a classic daisy flower: yellow cones flanked by porcelain-white petals, though it's got double rows.
AGRICULTURAL AND FARM NEWS Aster yellows is a condition that affects many flowers including not only coneflower, but also asters, chrysanthemum, coreopsis, cosmos, daisy, dianthus, gladiolus, ...