Yellow alyssum (Aurinia saxatilis), also commonly referred to as basket-of-gold, is a perennial plant with a spreading habit that puts out clusters of small yellow flowers on upright stalks from April to May. Its leaves are an attractive blue-gray color. The outstanding feature of this plant undoubtedly is its impressive floral display. The species will reach around a foot tall with a slightly wider spreadand quickly grows and reseeds itself to form a dense mat, which makes it an effective groundcover.