This long-blooming perennial has saucer-shaped flowers on sturdy, ascending stems. The Fastigiata cultivar has a neater appearance than the species, so it is usually the best one for a perennial border. The rose, pink, or white flowers with a slight notch in each petal have a silky appearance. The gray-green leaves are three-lobed to five-lobed. Although this plant may be short-lived, it remains a garden presence because of prolific self-sowing. Use it for color throughout summer in the border. Foliage may become marred by fungal diseases by late summer.