144 



AMERICAN VINES. 



sensitive to chlorosis. The Mustang has also diminished 

 the natural resistance of the Berlandieri to phylloxera 

 but has endowed it with great vigour. 



Certain hybrids of Berlandieri and Candicans (form Barnes) 

 are vines of extraordinary vigour. 



The Berlandieri X Candicans inherit the strong roots of 

 the Mustang, and from both species the defect of not being 

 easily multiplied by cuttings. T. V. Munson has, however, 

 isolated three forms, named Berlandieri X Candicans No. I, 

 No. 2, and No. 3, striking fairly well from cuttings and fairly 

 vigorous. The following table gives the relative vigour and 

 resistance to phylloxera, in fairly calcareous soils, for the 

 principal forms of Berlandieri X Candicans : 



Vigour. 



15 

 16 



Berlandieri X Candicans No. 1 

 No. 2 



No. 3 



Barnes 



Bouisset 



17 

 20 

 17 



Resistance. 



15 

 15 

 15 



15 

 16 



Experiments made in the chalky soils of Cognac have 

 shown, what was to be foreseen, that these cepages have only 

 a limited resistance to chlorosis. They should only be tried 



Fig. 74. Leaf of Barnes. 



