In the lists of synonyms given, all known names for a variety used in the American literature of the grape are brought together. These lists ought to be useful in correcting and simplifying the nomenclature of the grape which, like that of all of our fruits, is in more or less confusion. It is hoped that the work may become a standard guide, for some time to come at least, in the identification of varieties and in nomenclature, and that it will aid originators of new grapes and nurserymen in avoiding the duplication of names. In matters pertaining to nomenclature, the revised rules of the American Pomological Society have been followed, though in a few cases it has not seemed best to make changes which their strict observance would have required. The necessity for rules is shown by an examination of the synonymy of any considerable number of varieties as given in the body of the work. In some cases varieties have from ten to twenty names and very often different varieties are found to have the same name. This chaotic condition is confusing and burdensome and it has been one of the aims in the preparation of the work to set straight the horticultural nomenclature of the grape, thus lessening the difficulty and uncertainty of identification and making the comparative study of varieties easier. It would be impossible, and not worth while, could it be done, to give all of the references to be found in even the standard grape literature. Only such have been given as have been found useful by the writers or as would serve to give the future student of the literature of grape varieties a working basis. A brief history of each variety is given so far as it can be determined by correspondence and from grape literature. In these historical sketches the originator and his method of work justly receive most attention. The place, date and circumstances of origin, the distributor, and the present distribution of the variety, are given when known and are of about equal importance in the plan of this work. The technical descriptions of grapes are all first-hand and made by members of the present horticultural department of the Station from living plants. But rarely has it been necessary to go to books for any one character of a vine or fruit though the leading authorities have been consulted in the final writing of the descriptions and modifications made when the weight of authority has been against the records of the Station. Some differences must be expected between descriptions of varieties made in different years, different localities and by different men. For most part the varieties described are growing on the Station grounds but every opportunity has been taken to study several specimens of each variety and especially of the fruit. In many instances the descriptions have been submitted to the originators, introducers, or to some recognized grape specialist.