Some F x Hybrids 
31 
Fig. 20. A sample of the pollen that is produced by the perfect hermaphro¬ 
ditic hybrid vines of Vinifera-Rotundifolia parentage. Notice the compara¬ 
tively few, about 14.4 per cent, normal pollen grains marked with an arrow. 
Magnified 230 diameters. 
Fertility of flowers: The pollen in the perfect hermaphroditic 
flowers is a mixture of shriveled and plump, sterile and fertile grains. 
The fertility of these plump grains has been demonstrated in actual 
hand-made cross-pollinations, also by selling some of the flowers. The 
pollen in the imperfect hermaphroditic flowers is all shriveled and 
impotent. 
The pistils in both types of flowers are mostly sterile, only 2 from 
17 perfect hermaphroditic flower-clusters having developed into berries 
in 1918. The perfect hermaphroditic flowers are sterile because of 
hybridization, while the imperfect hermaphroditic flowers are sterile 
due to the double phenomenon of hybridization and intersexualism with 
attendant impotence. 
Fruit-clusters: Very small, only two berries have been grown to 
maturity and these were on one cluster. The results of 1918 indicate 
that the fruit-cluster will greatly resemble that of the Rotundifolia 
parent. 
