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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



experience, are those known by the numbers 3309, 3306 and 101 14 . The 

 first two are the most promising in California. 



Riparia X Rupestris 3309 (Fig. 5). This variety resembles in habit 

 a Rupestris, and the leaves are intermediate between those of the two 

 parents. 



It has small leaves, which, on the laterals, are rounded and without 

 lobes. The young shoots and leaves are sparingly pubescent, but the 

 rest of the vine is glabrous, and by this character readily distinguished 



from 3306. The vine is 

 male, and therefore does 

 not produce fruit. 



Riparia X Rupestris 

 3306 (Fig. 6). The 

 general habit of this 

 variety resembles also 

 that of a Rupestris, 

 but it is easily distin- 

 guished from 3309 by its 

 strongly pubescent leaves 

 and canes. Male vine. 



Riparia X Rupestris 

 101^ (Fig. 7). This 

 variety resembles in 

 habit its Riparia parent 

 more than 3309 or 3306. 

 Its range of adaptation 

 is less than that of the 

 latter, and it is most 

 suited to fairly rich 



soils, such as those suitable to Riparia. It bears small bunches of small, 



round, black grapes. 



Berlandieri Resseguier No. 1 (Fig. 8). The pure Berlandieri varie- 

 ties have all the qualities required in a stock resistance to Phylloxera, 

 ease of grafting, permanency of union, fertility of the scion, adaptation 

 to varied soils except one, that of ease of rooting. From 100 cuttings 

 only 10 to 15 rooted vines are obtained by the usual methods of propa- 

 gation. For this reason this species has never been used to any great 

 extent. Certain crosses of this species with Riparia, however, while 

 retaining the merits of the Berlandieri, possess rooting qualities almost 

 equal to Riparia. They are particularly promising for shallow, stiff 

 soils where the Riparia X Rupestris hybrids might suffer. 



FIG. 6. Riparia x Rupestris 3306. One half natural size. 



