i68 



AMERICAN VINES. 



Fig. 83. Leaf of Colorado. ; j jj $ 



resistance to phylloxera on the whole is good, and that their 

 resistance to chlorosis is superior to that of Riparia. This is 

 so, however, for the natural hybrid of these two species, which 

 is known under the name of Colorado. There are 

 many Color ados. Many have no doubt no relationship with 

 Monticola. It is not so with that shown in Fig. 83. The leaf 

 has most of the characters of V. Monticola. This vine has 

 a resistance to chlorosis superior to that of Riparia or 

 Riparia X Rupestris. It only bears a few more nodosities 

 than the Riparia Grand Glabre. It can, therefore, be utilized 

 for soils causing chlorosis of medium intensity. It roots freely 

 from cuttings, and the grafts knit well.* 



* The few forms of Riparia X Monticola created in France did not give the 

 results expected from them, and they seem very inferior to Berlandieri X Rupes- 

 tris for dry ani calcareous soils where they could be made use of. f (P. V. ipoo/ 



