Cotyledon undulata
 Cotyledon undulate also known as Silver crown or Silver Ruffles is a small succulent shrub up to 50 cm tall. It has unusual grey undulating leaves that give it a very sculptural shape. Cotyledon undulata is perhaps the most widely grown Cotyledon.The stems are covered with a thick white coating.The leaves are shaped like scallop shells grey-white to blue-grey with wavy edges and a powdery waxy coating over the whole leaf. The flowers are orange to yellow.