Clark, a commercial grower of pelargoniums in England, has written a practical and handsomely illustrated guide to these most useful plants, including angel, regal, unique, zonal, and ivy leaf pelargoniums. He provides full information on cultivation, propagation, pests, and diseases. Over 200 species and cultivars are described, and nearly one-third of them are illustrated in color photographs, most of them taken by the author especially for this book.