28 UNIVERSITY OF CALIFORNIA. 



Resistance. 



Rupestris Metallica 16 



Rupestris Ecole 18 



Rupestris of Kansas 18 



Rupestris of Fort Worth, Texas - 18 



Rupestris No. 62 of Jaeger's Catalogue _. 16 



Rupestris "Y" 18 



Celeburne (Texas) Rupestris 16 



Rupestris No. 64 18 



Rupestris No. 65 17 



The above are a few of the best known varieties of the Rupestris; but 

 as we have remarked, the mere resistance to the phylloxera does not, in 

 all cases, determine the true value of the variety in question. Still, it 

 is one of the most important factors in the problem. This point cannot 

 be brought out too strongly, for too much money has been absolutely 

 lost from the neglect to consider the resisting power of the variety one 

 would employ in the planting of a vineyard, especially when there 

 have been vines destroyed by the phylloxera on the same soil. With 

 resistance to the phylloxera must be taken into consideration the adap- 

 tability of the variety in question. These forms have been chosen by 

 the University of California, for introduction into California, from the 

 mass of Rupestris varieties, as much for their adaptability as for their 

 resistance. Among these some are found that, though they do not 

 possess as much absolute resistance as others, yet, on account of their 

 easy adaptability, they are in many cases as highly esteemed as those 

 which have a higher resisting power. It is for this reason that in selecting 

 from the one hundred and fifty and more varieties of Rupestris to intro- 

 duce into California, the University selected the Rupestris St. Georges. 

 Not that it is very much better than the other good varieties, but as it is 

 the object of the University to establish as a fact that which is denied by 

 many in California, namely, that there are varieties of all the species 

 of American vines some of which are better than others, and if an inferior 

 variety is selected money will be lost. It is confidently believed that, 

 as soon as the vine-growers come to a realization of the fact that there 

 are good and bad varieties, and that bad varieties mean loss, and the 

 good varieties mean profit, they will at once attend to the importation 

 of the other good varieties. 



The Rupestris St. Georges was selected from the list just given for the 

 reason that it suckers less than the others, is an erect grower, and, 

 above all, is a variety that will grow in a greater variety of soils and 

 climates than most of the others. It is within the range of prob- 

 ability that there may be other varieties of the Rupestris that will 

 be, as a whole, better suited to California conditions than the 

 Rupestris St. Georges, but as at the present moment the Station is 

 trying to establish a custom (selection of varieties of species), the most 

 vigorous grower and likely variety has been selected, proposing, in the 

 near future, to supply those who wish to try them, with other varieties 

 that may do better, and will feel more than satisfied if the present 

 varieties of resistants can but be improved upon, even if the very best has 

 not been secured. It is very certain that the Rupestris St. Georges is 

 a more vigorous grower and thicker wooded than any of the Rupestris 

 thus far found in this State. While, for various reasons, it is in this 

 bulletin called Rupestris St. Georges, it must be remembered that it has 

 many other names, such as the " Rupestris Phenomene," " Rupestris Phe- 

 nomene du Lot," "Rupestris Sijas," "Rupestris Monticloa," "Rupestris 



