By Climate, Perennials, Ornamental Plants 

Written by three distinguished clematis experts, the Timber Press Pocket Guide to Clematis profiles 300 stunning plants from an international selection of garden-worthy species and hybrids, from long-time favorites to the highly sought-after new cultivars coming out of Poland, Estonia, Latvia, and Japan. All the plants are readily available at clematis nurseries, including 100 award winners which have proven themselves to experienced and inexperienced gardeners alike. Specific cultivation information is given for each plant, including hardiness zones, light and temperature needs, and time of flowering. Illustrated with 320 photographs of flowers at the height of bloom, when their true color is best seen, this pocket guide is a valuable complement to the authors' Illustrated Encyclopedia of Clematis and a compact reference for taking to the nursery or garden center. - from Amzon