88 



AMERICAN VINES. 



rr. 



or Rupestris monticola femelle, is fructiferous; but differs 



essentially in its less perfect qualities of vigour and resis- 

 tance in calcareous soils. 



Rupestris Ganzin. This form, according to Millardet, 



who studied and named it, had its origin in Texas, from 



whence it was imported about 1874 by Charles Martin. 



Dr. Davin and G. Couderc first noticed, multiplied, and 



then distributed it In 1880, we had an opportunity of 



studying it at Ganzin 's It 

 is one of the Rupestris which 

 had been extensively propa- 

 gated in suitable soils; but 

 is now actually discarded on 

 account of its inferiority to 

 Rupestris Martin, which is 

 superior to it in similar 

 soil. 



Its characters are stump 

 vigorous, trunk rather large; 

 young shoots of a dark 

 reddish violet and shining; 

 secondary ram Jications 

 rather numerous, giving to 

 the stump a somewhat^ 

 bushy appearance. Canes 

 fairly large, sinuous, inter- 

 nodes rather long, lively 

 chestnut colour at maturity. 

 Leaves (Fig. 36) of medium 

 dimensions, a little wider 

 than long, sub-trilobed, 



slightly folded along the mid-rib, symmetrical; upper-face 



rather light glaucous green 



and slightly shining; under- 



face pale green and dull; 



two series of well-defined 



teeth; petiolar sinus (Fig 



37) deep open V shape; 



ribs strong, prominent, 



dull rose colour for the 



greater part of their length on the upper-face. Petiole red, 



rather strong, with a well-marked groove bordered with short 



stiff hair. 



Pig. 36. Leaf of Rupestris Ganzin. 



Fig- 37- Petiolar Sinus of Rupestris 

 Ganzin. 



