Mesembryanthemum is a drought tolerant, low-growing succulent that produces pretty daisy-like flowers in bright pastel colours all summer long. It's also called ice plant, as its stems and leaves are covered in small water-retaining structures that glisten in the sunshine, giving a frosted effect. It's also sometimes called Livingstone daisy (named after the explorer David Livingstone), but this is used for several similar plant groups.