Some F x Hybrids 
13 
Fig. 4. Sections of canes each of the two parents and of the hybrid vine. The cane at 
the left is V. rotundifolia (light male), the one in the center is Winchell (female parent), 
the one on the right is the hybrid. 
The Winchell cane shows the well defined diaphragms that interrupt the pith column 
at every node while the other two canes show no such diaphragms. The hybrid cane, 
furthermore, exemplifies its hybrid nature in its relatively less zigzag growth, the slightly 
enlarged nodes, the internodes, which are intermediate in length, and the pith column 
whose relative diameter is intermediate between that of both its parents. Reduced. 
