|C. americana is erect in habit with sizable pale lavender to ivory flowers. An easily seeded annual with grey-green foliage and blue, pink, burgundy, or white 1 inch flowerheads. Blue is the favorite and often used in boutonnieres. These plants are attractive to bees and butterflies, and are good cut flowers. Sow seeds late summer or eary fall in milder climates or early spring in colder climates. Plants will do better if lime is added to the soil, especially in acidic areas.