any of various shrubs or small trees of the genus Ceanothus,native mostly to western North America and often cultivated for their ornamental foliage and showy clusters of usually blue or whitish flowers

• 任何一种鼠李属灌木或小树，原主要产于北美西部，因其装饰性叶子和开蓝色或白色花朵的花簇而常被广泛种植