Alyssum — Alyssum is a genus of about 100-170 species of flowering plants in the family Brassicaceae, native to Europe, Asia, and northern Africa, with the highest species diversity in the Mediterranean region.
The genus comprises annual and perennial herbaceous plants or (rarely) small shrubs, growing to 10-100 cm tall, with oblong-oval leaves and yellow or white flowers (pink to purple in a few species).
The genus Lobularia is closely related to Alyssum and was formerly included in it. The widely cultivated species popularly known as “Sweet Alyssum” is Lobularia maritima.
The best-known species of Alyssum, Aurina saxatilis, is commonly called golden tuft, gold dust, or rock madwort; it is popular in rock gardens. Aurina murale, yellow tuft, is similar to saxatilis but flowers later.