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considered by us as a Berlandieri X Rupestris (No. 2) is rather 

 vigorous (18) and fairly resistant (16). Contrary to No. T, 

 it has no white tomentum on the young leaves. The canes 

 are a little more slender, the internodes longer, of a dull 

 vinous-brown colour. Leaves medium, very thick, as wide 

 as long, orbicular, folded along the mid-rib, slightly gof- 

 fered along the main ribs, of a deep lustrous green, almost 

 glabrous on the under-face; petiolar sinus U shape. This 

 form roots freely from cuttings, but is inferior, as far as 

 vigour is concerned, to the artificial hybrids of the same 

 group ; it is therefore without cultural value. 



Millardet, de Grasset, and Malegue have created several 

 artificial hybrids of Rupestris X Berlandieri. They are 

 generally fairly vigorous, and inherit from the Berlandieri a 

 high resistance to chlorosis. Their resistance to phylloxera 

 is very good. They are excellent graft-bearers, not suitable, 

 however, for strongly chalky soils, but for all those similar 

 to the groie soils of the Charente and Bourgogne, that is to 

 say, pebbly.* 



Hybrids of V. Berlandieri and V. Monticola. In the 



few regions where the V. Monticola grows in Texas, the V. 

 Berlandieri is invariably associated with it; the wild hybrids 

 of these two species are therefore rather numerous. They are 

 more vigorous, in a wild state, than most forms of V. Monti- 

 cola, and grow like them on barren hills formed of fairly 

 hard limestone, the V. Berlandieri endows them with extra 

 vigour. But a rather constant fact observed for all the forms 

 introduced into France up to 1894 is that their resistance to 

 phylloxera is less than that of either of the two species they are 

 derived from. Amongst the eight forms introduced at the 

 School of Agriculture, Montpellier, the most vigorous (No. i) 

 has a resistance of 14, like the Solonis ; the No. 6 has the same 

 resistance, but is inferior to Solonis in vigour ; finally, the No. 8 

 died from phylloxera. A curious fact, corrobating what has 

 been said in the first part of this work, takes place with this 

 form, i. e., the weakening due to phylloxera manifesting itself 

 externally, without the leaves becoming chlorosed, although 

 the vine is growing in calcareous soils. The origin of this 

 hybrid explains this relative resistance to chlorosis even under 

 the action of phylloxera. 



* Amonerst the best forms we may mention the Rupestris X Berlandieri, Millardet 

 No SOIA and No.aiof, as bsmg very ' vigorous and very resistant to chlorosis, 

 and phylloxera. (P. V. 1900.)! 



