14 



MANUAL OF AMERICAN GRAPE-GROWING 



French vineyards, the vines being not only resistant to the 

 phylloxera but also vigorous and hardy. At present, a large 

 proportion of the vines of Europe, California and other grape- 

 growing regions are grafted on the roots of this or of other 



FIG. 5. A shoot of Vitis xulpina. 



