It is probable, too, that our climate, at the North at least, is not well suited to the production of the Old World grape. As a species, the Vinifera grapes thrive best in climates equable in both temperature and humidity. The climate of eastern America is not equable; it alternates between hot and cold, wet and dry. The range in both temperature and humidity is far greater than in the grape-growing regions of Europe, California, South Africa or Australia. The fleshy roots of _Vitis vinifera_ are more tender to cold than are those of the species of northern United States and this would prevent its culture becoming very general in many regions where native grapes can be grown. It is only in the regions west of the Rocky Mountains, and more particularly in California, that the varieties of Vinifera are successfully grown in America. The great viticultural interests of the far West are founded upon the success of this one species. The native grapes can be grown but they cannot compete in California with _Vitis vinifera_ for any purpose. Nevertheless American species are indispensable in this western region for stocks upon which to graft the Vinifera varieties, and it is probable that the time is not far distant when all California vines will be upon American roots. Within the boundaries of latitude in which Vinifera varieties are grown west of the Rocky Mountains the grape shows wonderful adaptability; it is found at all elevations permitting fruit culture; it grows on practically all soils; it thrives under irrigation or under dry farming; it is given various kinds of treatment, including total neglect, and still thrives; the number of varieties grown for wine, raisin and table grapes runs into hundreds. The truly wonderful success met with in the cultivation of this species west of the great continental divide makes all the more remarkable the fact that in no place east of the divide will varieties of it thrive. We now pass to a consideration of the American grapes, their characters, the early notices of them, their rise, their success, and their future--a more pleasing task than to record disaster after disaster in growing the grape of the Old World. CHAPTER II AMERICAN GRAPES