|C. americanus bears white flowers early in summer and is a very tolerant plant, managing even in poor growing situations.Compact, low-growing, broad, deciduous shrub. Leaves are oblong, glossy, dark green and finely toothed up to 3 inches long. White flowers are borne profusely in large lateral cymes up to 2 inches long. Excellent for a shrub border or against a sunny wall.