- alyssum, madwort - any garden plant of the genus Alyssum having clusters of small yellow or white flowers
--1 is a kind of crucifer, cruciferous plant
--1 is a member of Alyssum, genus Alyssum - Alyssum, genus Alyssum - a genus of the family Cruciferae
--2 is a kind of dilleniid dicot genus
--2 is a member of
--2 has members: alyssum, madwortCruciferae, family Cruciferae, Brassicaceae, family Brassicaceae, mustard family