Charles Christopher Parry (1823-1890) is well known to botanists worldwide. More than eighty new species of flowering plants were named from Parry's Colorado collection, and many more from his collections in Mexico and the American Southwest. Fascinated with mountains, Parry made barometric observations that permitted the first accurate estimations of the high peaks. Yet his greatest contribution to science was through the distribution of his botanical collections to the museums of the world. King of Colorado Botany combines the lists of Parry's collections with the scientific and semipopular descriptions of his travels, up until now found only scattered in rare periodicals and old newspapers. This is a work that will be of interest to naturalists and all others interested in the West during Parry's lifetime.