1924] і 
HARRIS—-THE INFLORESCENCE OF MANFREDA VIRGINICA 457 
1. The average number and the variation in number of flowers 
and fruits per inflorescence and seeds per locule in the two habitats 
and years has been determined, and compared with the available 
data for fertility in other species. For details reference must be 
made to the body of the paper. 
2. About 22 per cent of the flowers develop their ovaries into 
fruits. The correlation between the number of flowers formed 
and the number of fruits matured is of about medium value. This 
is, however, due to the fact that as the result of chance only the 
larger inflorescences should produce larger numbers of fruits. A 
special formula shows that there is little relationship between the 
size of the inflorescence as measured by the number of flowers 
which it produces and its capacity for maturing its ovaries into 
fruits. 
3. While the more proximal and more distal flowers on the 
inflorescence show a smaller proportion of fruit production, there 
is little relationship between the size of the inflorescence as meas- 
ured by the number of flowers produced and the position of the 
flowers which mature their ovaries into fruits. 
4. There is practically speaking no correlation between the 
number of flowers on the inflorescence and the number of seeds 
matured perlocule. Thisis apparently in part due to the negative 
correlation between the number of fruits matured and number of 
seeds per locule. If correction for the number of fruits be made 
it is shown that the inflorescences which produce the larger 
numbers of flowers also mature slightly larger numbers of seeds 
per locule. 
5. There is a slight negative correlation between the number of 
fruits ripened per inflorescence and the number of seeds matured 
per locule. 
The physiological significance of (4) and (5) is considered. 
6. The fertility of the fruits tends to decrease slightly, and 
approximately uniformly, from the proximal to the distal end of 
the inflorescence. 
7. While there is little relationship between number of flowers 
or number of fruits per inflorescence or position on the inflores- 
сепсе and the number of seeds per locule, the correlation between 
the number of seeds in the 3 locules of the fruit is high. Thus 
