RESISTANT VINES. 



9 



lands and along rivers, but it is also found in very dry locations; in 

 these, however, its growth is not as vigorous. It does best in alluvial 

 soils, but its large roots enable it to grow well in heavy clays. This 

 variety is hard to grow from cuttings, but is very valuable in 

 hybridization. 



Vitis cordifolia. This vine is adapted to the same class of soils as 

 the V. riparia; it is very highly resistant to phylloxera, and does fairly 

 well in heavy soils; it has been also used to great advantage in creating 

 hybrids. 



PLATE 3. V. ARIZONICA. 



Vitis arizonica. This vine (Plate 3) is found mostly in Arizona and 

 New Mexico, while numerous hybrids of Arizonica X Californica exist 

 in the region where both varieties grow wild. It grows well from 

 cuttings, is nearly as resistant as Rupestris, and ought to be studied 

 carefully. In adaptation it would hold a place between the Riparia 

 and the Rupestris. 



