Preliminary Revision of North American Species of Cactus, Anhalonium, and Lophophora is a scientific book written by John Merle Coulter in 1894. The book provides a comprehensive analysis of the different species of cactus, Anhalonium, and Lophophora found in North America. It serves as a preliminary guide for botanists and scientists who are interested in studying these plants. The book contains detailed descriptions of each species, including their...