CEPAGES. 



109 



Pig. 84. Leaf of Riparia X Rupestris, Nos. 101 14, Millardet and de Grasset. 



Hybrids of V. Cinerea and V. Rupestris. Rare in a 

 wild state; only found in the Indian Territory and north of 

 Texas. They grow in the same soils as the Rupestris, and, on 

 account of their specific origin, it was to be assumed that they 

 would be affected by limestone soils; this actually occurred in 

 the chalky soils of Cognac. In a wild state the Cinerea X 

 Rupestris have rather great vigour, although inferior to that 

 of Cordifolia X Rupestris ; they grow, however, in drier and 

 poorer soils than the latter. One of the forms isolated by 

 Munson has a resistance to phylloxera equal to 17. H. Jsegar 

 created two very vigorous hybrids of Cinerea X Rupestris. 

 They do not succeed in chalky calcareous soils, and seem to 

 be inferior to Rupestris in all soils in which the latter can 

 be cultivated. Their rooting from cuttings is only 

 middling. 



