Manual OF CULTIVATED PLANTS Most commonly grown in the continental United States and Canada

The author reveals that the purpose of this revised Manual of Cultivated Plants, as of the original work, is to provide a ready means for the identification of the species in the usual domestic flora of the continental United States and Canada. It is manifestly impossible to describe within the limits of a single volume all the plants that may be in cultivation in the territory. Many species are known only in botanic gardens, experiment stations, test grounds, or in the collections of specialists and fanciers. To attempt to include these species would make a work of unmanageable size, and the subject would necessarily be greatly complicated for the general student; moreover, the species in these institutions and collections are usually well known to those who grow them. Any number of native plants are also likely to be transferred to grounds and many of them are offered by dealers; one never knows what species these may be; to include them all would introduce into the book a good part of the native flora and duplicate the field of the regular manuals of American plants. Persons desiring to go further in the subject must consult special monographs. The plants entered in this volume represent all parts of the world. They bring the names now current among the specialists of different countries. The application of the International Rules of Nomenclature naturally follows.