96 AMERICAN VINES. 



it is the most subject to it of all the American species, and 

 on no account should be planted where there is stagnant 

 water.* We will see the wide importance that the Rupestris 

 had as an element in hybridization, on account of its primor- 

 dial qualities of vigour and resistance to phylloxera. 



But amongst the diverse forms of Rupestris that have 

 been mentioned we must state precisely, from the aspect of 

 adaptation and reconstitution, which are to be preferred in 

 different soils. Only the Rupestris du Lot, Rupestris Martin, 

 and Rupestris Mission should actually be cultivated. The 

 Rupestris Ganzin, for example, is inferior to the Rupestris 

 Martin as to vigour, but has the same qualities of adapta- 

 tion. The Rupestris Metallic a and most of the best forms of 

 Rupestris de Fortworth are not equal to the Rupestris du Lot, 

 which succeeds in the same surroundings. 



The Rupestris Martin, on account of its great resistance 

 to phylloxera, must a 1 ways be utilized in poor siliceous or 

 pebbly soils, containing little or no limestone. 



The Rupestris du Lot can actually replace Solonis and 

 Jacquez in relatively calcareous and poor soils, or where 

 formerly recourse was had to these grafting-stocks, and also 

 the Vialla in compact siliceous soils. 



The Rupestris Mission is preferable to Rupestris du Lot 

 for relatively fertile soils, where the last-named, through its 

 excess of vigour, urges the grafts to non -setting; or also in 

 the soils where certain French vines, grafted on the Rupestris 

 du Lot, are normally subject to non -set ting, and do not yield 

 a regular or abundant crop. 



The Rupestris Metallica has a greater resistance to 

 chlorosis than the Rupestris Martin or Rupestris Ganzin, 

 'but is not equal in this respect to the Solonis. 



V. MONTICOLA. 



(a) Description (General Characters). Stump little vig- 

 orous, semi-climbing habit, trunk slender: wood of the year 

 ramified, shining, of light-brown mahogany colour 

 much striated, tendrils discontinuous. Leaves (Figs. 44 

 and 45) small, as wide as long, sub-cordiform, almost entire, 

 slightly folded along the mid-rib; petiolar sinus deep, with 

 overlapping sides; teeth blunt, obtuse, normal to the limb, 

 which is thick and slightly undulating (bubbly) : upper-face 



*Rupestris has done well in soils where the water level is close to the surface 6 months 

 in the year. (Translations from a letter of L. Ravaz.) 



