"For persons with a special interest in succulents, and cacti in particular, this book is a must. Others will find the volume of value not only as a means of naming these highly specialized plants but as a source of information on the structure and distribution of the various species."--American Scientist "Of tremendous value to the professional botanist and ecologist, and with layman English and careful instructions, the work provides the amateur botanist insight into a fascinating family."--Garden Journal "For the general desert lover as well as the botanist."--Books of the Southwest.