UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



FIG. 10. Riparia x Berlandieri 420A. 

 One half natural size. 



(Mataro) and a 

 Rupestris. It is, 

 perhaps, the most 

 widely planted of 

 all the American 

 vinifera hybrids. 

 Prosper Gervais 

 describes it as " A 

 stock character- 

 ized by its ex- 

 treme vigor, rapid 

 development, ease 

 of rooting and 

 grafting, and the 

 f ruitfulness of its 

 grafts." It is par- 

 ticularly suited 

 to deep, rich, 

 humid, clay soils, 

 and makes excel- 

 lent unions with 

 all varieties of 

 vinifera. 



The vine is 

 fruitful, bearing 

 large numbers of 

 small, round, 

 bluish-black 



The leaves resemble Rupestris, 

 and unlike most crosses contain- 

 ing vinifera, its resistance to 

 Phylloxera is quite sufficient and 

 superior to that of Lenoir. It is 

 very vigorous and roots easily 

 from cuttings. It is somewhat 

 difficult to graft, but when suc- 

 cessful the grafts make good 

 unions and are vigorous and 

 fruitful. Its chief merit is that 

 it succeeds in wet, compact soils, 

 where most other varieties fail. 



Mourvedre X Rupestris 1202 

 (Fig. 14). This variety is a 

 cross between the Mourvedre 



FIG. 11. Solonis x Riparia 1616. One half natural size. 



