12 
Agricultural Experiment Station 
selfed seedlings of Winchell. The plant is not inclined to be rampant 
in growth, hut instead is low and spreading. In general appearance the 
hybrid vine may he said to 
resemble the Winchell vine 
more than the Rotundifolia 
parent, but a critical exami¬ 
nation of individual charac¬ 
ters reveals the true hybrid 
nature of the vine. 
Vigor of vine: Fairly 
strong but not vigorous, not 
hardy, very slow to leaf out 
in the spring, canes die back 
perceptibly every winter. 
Canes: Fairly strong but 
neither stout nor slender, 
nearly straight, not bent at 
the nodes, slightly com¬ 
pressed, angled especially 
when young. Sometimes at 
the base the canes become 
round and smooth. The stri- 
ation is very obscure. 
Wood: Soft, one-year- 
old wood is greenish-yellow 
in color; easily grafted onto 
roots of Euvitis. 
Pith: Green and occa¬ 
sionally brown in color, full 
of sap. The green pith dur¬ 
ing the dormant season is 
crowded full of starch 
grains. The brown pith is 
composed of dead cells and 
when dry sometimes splits 
into discs. Very little, if 
any, starch grains remain in 
this pith during the dormant 
season. Sometimes cells of 
this brown pith are found 
scattered among the green. 
The pith in general may 
be said to be continuous 
through the nodes. It is only 
very seldom that it is inter- 
Fig. 3. Sections of two canes from 
the 1913 Winchell-Rotundifolia hybrid 
vine showing practically continuous 
pith which is characteristic of the Ro¬ 
tundifolia parent species. Reduced. 
