A genus of hardy annuals or shrubby perennials, very free-flowering and excellent for planting on dry banks and among hardy shrubs, for covering the ground, or for rock work. Alyssum alpestre, or Sweet Alyssum, is raised by simply sowing the seeds, in Winter or early Spring, where wanted, covering them lightly with light soil; thin the plants to about six inches apart. Alyssum saxatile, and other shrubby species, are best propagated by cuttings placed in a cold frame in September and shaded for about two weeks or until rooted, when they should be gradually exposed to light and air and placed out of doors until wanted.