This is a guide to illustrations found in over 300 cactus books, reference materials, world-wide cactus journals & catalogs. Cross-referenced for easy retrieval. In other words, names are cross-referenced to find the same plant known by other genera, species or varieties, thus saving time in finding photos. A monumental task of compiling data of all author-known illustrations found in publication. A must for all reference libraries! Rainbow Gardens, the largest seller of books on Cacti & Succulents, calls this "THE major publication of 1989!" Standard library discount. Phone orders (1-602) 432-7040.