20 
Agricultural Experiment Station 
The majority of the pollen grains of the perfect-flowered vines are 
much shriveled, angular and impotent. Some normal and viable 
pollen grains (about 7.7 per cent) are produced as was discovered by 
the aid of the microscope and in actual hand pollination experiments. 
These vines are practically sterile because of hybridization. 
While these perfect-flowered hybrid vines did not set fruit in 1918, 
it is safe to say that some of the pistils in later years will prove fertile. 
This conclusion is based on work done with the imperfect hermaphro¬ 
ditic Winchell-Rotundifolia hybrid vine of 1912, and the Vinifera- 
Rotundifolia perfect-flowered hybrid vine of 1916. 
The blooming period of these hermaphroditic vines is about midway 
between that of the two parents. 
Il-a. Herbemont X Rotundifolia (Light Male), 1913. 
General character of plant: Very weak, not hardy, dies back very 
badly during the winter if not well protected, very low and bushy. 
After five years of alternate growing and dying back, the plant measures 
not more than two feet in height. This plant has neither the appear¬ 
ance of Herbemont nor that of Rotundifolia. 
Vigor of vine: Very weak, but more vigorous than some Ilerbe- 
mont seedlings. 
Canes: Short and slender, straight, not much bent at the nodes, 
angled when young, somewhat rounded on older wood, not much com¬ 
pressed, faintly striated. 
Wood: Hot as hard as that of Rotundifolia, greenish-white in 
color, easily grafted. 
Pith: Greenish-brown to brown, sappy, usually filled with stored 
starch grains, practically continuous through the nodes, occasionally 
a woody diaphragm or part of one may be observed. Pith cells at the 
nodes are compressed and densely packed, thus producing somewhat the 
appearance of a diaphragm. Column of pith when compared to the 
diameter of the cane is larger than in Rotundifolia and smaller than 
in Herbemont. 
Bark: Dark reddish-brown overcast with gray, rough; lenticels sub¬ 
merged and inconspicuous; bark persistent in young canes, nonshred¬ 
ding, breaking ofl in irregular plates and patches when old; no bloom 
on the bark of the vine. 
Hodes: Slightly enlarged on bud side. 
Internodes: Average length slightly more than one inch, which is 
about the length of an average Rotundifolia internode. 
Leafbuds: Small, dark reddish-brown in color; mature buds more 
or less conical in shape; immature buds flattened like those of Rotundi¬ 
folia. 
Shoots: Leaves not expanding as rapidly as in Herbemont, but not 
as slowly as in Rotundifolia. 
