1924] 
HARRIS—IHE INFLORESCENCE OF MANFREDA VIRGINICA 423 
available. Thus in comparing the results for the 2 years in the ` 
same habitat we may determine the differences between the 
means for series I and series IV + V for Meramec Highlands and 
for series II + ІП and series VI + VII for Jefferson Barracks. The 
differences for the two years are given in table ут, which shows 
that the average number of flowers and fruits is slightly, but sig- 
nificantly, higher at Meramec Highlands in 1906 than in 1907, 
whereas the reverse is true at Jefferson Barracks. The varia- 
bilities, both absolute (S. D.) and relative (C. V.) are higher for 
both flowers and fruits in both habitats in 1907 than in 1906. 
We now have to consider the difference in the inflorescsence 
produced in the 2 habitats in ће вате year. The differences may 
be taken (Meramec Highlands) less (Jefferson Barracks). 
'The differences in table vir are obtained by comparing the 
results for series І (Meramee Highlands) and series II -- III 
(Jefferson Barracks) for 1906, and for series IV + V (Meramec 
Highlands) and series VI + VII (Jefferson Barracks) for 1907. 
'The differences in this table show that in both years the number 
TABLE VII 
COMPARISON OF THE STATISTICAL CONSTANTS FOR PLANTS GROWING IN 
THE DIFFERENT HABITATS IN THE SAME YEAR 
i Standard Coefficient of 
иен Меш deviation variation 
1906 
WINGS i г аға +5.4531+.3575 | -- 1.3301 2-.2528 —0.8781 2-0.9424 
а ОДНЕ ОЧНА А 41.5385 +.1239 | --0.2894--.0876 —7.2653+1.6298 
1907 
MOWER с гуу ОИЕ И +0.4092 4-.2933 gp papi —1.6530+0.8173 
Күйін”; —0.31362-.1041 | —0.1516+.0736 | +0.1805+1.5153 
of flowers is larger at Meramec Highlands than at Jefferson 
Barracks. The difference in 1907 is, however, insignificant. The 
number of fruits is slightly higher at Meramec Highlands in 1906 
but slightly lower in 1907. The results of this comparison show 
that the differences between the 2 habitats are either nil or 
much smaller than would have been anticipated from а mere m- 
spection of the 2 habitats. 
We now turn to the question of relative values of the constants 
for number of flowers and number of fruits per inflorescence. 
