12 
Agricultural Experiment Station 
The Department reports that of the commercial varieties, Thomas 
seems the most congenial to the pollen of Euvitis varieties, although 
some Muscadine seedlings seem even more promising for work in hybridi¬ 
zation. 
It will be noticed from the foregoing that the given varieties of 
Euvitis will easily fall into two categories; namely, those of the pure 
species of Vitis vinifera, and those that are of hybrid origin. Thus only 
one pure species, Vitis vinifera, is represented in all of this work and 
all of the other Euvitis varieties, with only one exception (Ives), also 
contain some blood of the Vitis vinifera species. 
While these results represent a large amount of work and are of much 
practical importance and value, yet that broader field which pertains to 
different species and genera and reciprocal crosses seems to have been 
entirely neglected. Results secured from hybrid varieties always will 
represent what can be done with that or a similar variety and no more, 
except where bridging becomes a necessity. 
This concludes the review of the work on the hybridization of Vitis 
rotundifolia with related species as has been reported from time to time 
in Horticultural literature. 
WORK DONE AT THE NORTH CAROLINA EXPERIMENT 
STATION 1912-1918 INCLUSIVE 
1. Scope of the Work in Hybridization. 
Erom a commercial point of view, the Rotundifolia grapes have 
proven their worthiness of a place in our permanent national horticul¬ 
ture. The layman has begun to appreciate the real economic value of 
the vine and his demands for the products of this grape are large and 
ever on the increase. As never before people all over the world are 
looking upon Vitis rotundifolia as a new, distinct and valualle asset to 
our viticulture. 
Although Vitis rotundifolia is so valuable and so full of greater 
promise, it is defective notably in the unimproved state of the vine and 
natural undesirable characters of the fruit. The former is easily over¬ 
come, but the latter is difficult to eradicate. Improvement has become 
the pass-word among viticulturists. There are, however, many ways of 
improving a plant. Hybridization is one of these and a fruitful source 
of variation. The scope and object of this article will be an attempt to 
discuss, in part, the limits of hybridization of Vitis rotundifolia with 
related species and genera. By knowing the limits in hybridization and 
the comparative ease or difficulty with which hybrids of known parent¬ 
age can he secured, much unnecessary work and vexation may be spared 
the practical grape breeder. 
