The book ""Preliminary Revision Of The North American Species Of Echinocactus, Cereus, And Opuntia"" was written by John Merle Coulter and published in 1896. The book is a comprehensive guide to the various species of cacti found in North America, specifically those belonging to the Echinocactus, Cereus, and Opuntia genera. The book is divided into three main sections, each focusing on one of the three genera. Each section provides detailed descriptions of the various species within the genus, including their physical characteristics, habitat, and distribution. The book also includes illustrations and maps to help readers better understand the different species and their locations.In addition to the descriptions of the different cacti species, the book also provides information on the history and classification of these plants. Coulter discusses the various taxonomic changes that have occurred over time and provides insight into the scientific naming conventions used for these plants.Overall, ""Preliminary Revision Of The North American Species Of Echinocactus, Cereus, And Opuntia"" is a valuable resource for botanists, horticulturists, and anyone interested in the diverse and fascinating world of cacti.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.