Ground cover - Yellow Stonecrop (Sedum Acre) forms a dense carpet of fleshly, green leaves and countless star-shaped yellow flowerets. This evergreen plant is a ground cover that holds its leaves in winter.
Commonly called Basket of Gold, perennial alyssum makes a wonderful wall or rock garden plant. Every spring it develops masses of cheerful yellow flowers that look terrific tucked between rocks and boulders. - Flower Beds and Gardens