Some F* Hybrids 
37 
Fig. 27. An Fi hybrid vine between V. aestivalis (female) and V. rotundi- 
folia, G-52 (male). This vine has been grown from seed that germinated in 
March of 1919. The Rotundifolia leaf characters are plainly visible in this 
vine. Reduced. 
IX. Winchell-Rotundifolia Hybrid X Rotundifolia, 1917. 
The leaf and stem characters of this plant during the first season of 
its growth appear very much like those of the F* hybrid vine between 
Winch ell and Rotundifolia. 
C. A GEHERAL SURVEY OF THE HYBRID CHARACTERS 
IX THE Fi GEXERATIOX 
After having minutely described the characters of hybrid vines which 
are of Euvitis-Rotundifolia parentage, let us briefly compare these with 
similar characters that are to be found in the parental vines. 
The canes may be said to be intermediate in character between the 
two types of parental vines in that they are nearly straight, somewhat 
angled like in Rotundifolia and more or less rounded, somewhat bent 
at the nodes and partially striated as in the Euvitis parents. 
