Production of Fruits and Seeds in Certain Plants. 109 
The plants showed two distinct kinds of umbel, those at 
the top of the main stem and side branches which bore the 
largest number of perfect fruits, and the lateral umbels at the 
side and beneath the more prominent ones, which bore rela- 
tively a smaller number of perfect cremocarps. This suggests, 
that the abortive condition of many of the fruits was due to 
the preponderating amount of food being supplied to the 
favored umbels to the exclusion of the later formed and 
disadvantageously situated ones. 
The relative ratios established in these tables between the 
perfect and abortive seeds and fruits give some idea as to the 
success of the act of pollination and fertilization. It is sur- 
prising, when we set aside our @ friori position and draw up 
statistical tables, to find in a number of instances that the 
abortive seeds and fruits exceed the perfect ones. 
