Evergreen, self-clinging climbers which succeed on almost any soil and are extremely hardy. They are easily increased by 8 in. longin late autumn. Contrary to popular opinion, ivy does not damage sound stone or brick walls, but will, of course, penetrate into any cracks or crevices. There are many varieties of the common ivy ( ), differing in the colour and shape of the . Buttercup (also known as Golden Cloud and Russell’s Gold) has small suffused bright yellow. See also ROOM PLANTS.