This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
A genus of free-growing stove climbers (now included in the genus Vitis), remarkable for their handsome foliage. C. discolor has velvety-purple leaves marbled with white and shaded with pink, and is perhaps the best known. C. argentea has silvery-grey markings on the leaves; and C. porphyrophyllus has purple-tinted foliage. The plants flourish in a rich loamy soil with a little sand and leaf mould, and are chiefly valuable for covering walls or trellises in a warm moist house. They are propagated by cuttings.