Some Fi Hybrids 
19 
sides of depressions smooth or slightly wrinkled, slightly lighter in color 
than the body of the seed. The general outline of the seed is oblong 
with short beak. Its general appearance is that of Rotundifolia, but 
the broad, deep suture on the top of the seed together with the color and 
form of the ventral sutures is indicative of the Winchell seed. 
I-b. Winchell X Rotundifolia (1-1 and G-52), 1916. 
These plants differ from the one preceding in only a few respects. 
Since the male parent of these vines is a true hermaphroditic Rotundi¬ 
folia, two types of hermaphroditic vines have appeared, the perfect and 
the imperfect. 
The perfect hermaphroditic vines bear the larger type of flower- 
cluster that is found associated with the male and hermaphroditic 
Rotundifolia vine, hut the texture of the cluster tissues and the general 
appearance of the flower buds is more nearly that of the Winchell 
parent. The imperfect hermaphroditic vines are similar to the one 
previously described. 
Fig. 10. A sample of the pollen that is produced by the perfect hermaphro¬ 
ditic hybrid vines of Winchell-Rotundifolia parentage. Notice the three 
apparently normal pollen grains marked with an arrow and found in the 
upper right-hand corner. Magnified 230 diameters. 
