1912] HARRIS—STAPHYLEA 405 
TABLE XIX, CERCIS 
NUMBER OF OVULES PER OVARY 
: 
° ie 2 3 4 5 6 7 8 9 To 
POG Vere vee va bere to ae a 3 49 | 279 | 476.| 76 | 4 
MTGG Boe: I I 5 32 12877: 1-937 | aat bt098 Pat Bos ge 
al go ome Saab vep tete ae ne 10 231.108.) 240 ib £70 It nee alee | ve 
number of inflorescences was used in calculating the probable error. 
This is perhaps justifiable, but had NV been taken as 100, the actual 
number of inflorescences, the probable error would have been much 
higher, and in the third tree the correlation would have been only 
about twice or thrice its probable error. On the basis of available 
data, there is no demonstrable relationship, therefore, between the 
number of ovaries on an inflorescence and their characteristics. 
4. THE HYPOTHESIS OF THE INDIVIDUALITY OF INFLORESCENCES 
It has now been shown that neither position nor number of 
pods has sufficient relationship with the two characters immedi- 
ately under consideration to produce a sensible correlation between 
them. Theoretically both p and m would influence, to some extent, 
the quantity of plastic material available for a given fruit, but so 
far as these evidences go, similarity of nutrition for both seeds and 
fruit wall has little influence in bringing about the correlation 
between them. These are not the only factors which might 
influence the food supply of a developing fruit. Some inflorescences 
may be much more generously supplied with fruit and seed building 
substances than others, and in the distribution of this material 
throughout the inflorescence, position of pod may have a negligible 
significance, and number of pods developing be of only small 
importance. 
I believe the following method to be satisfactory in determining 
whether 7, is due to the differentiation between the inflorescences 
of an individual either (a) in the capacity for development of the 
protoplasm of which their ovaries are made up, or (0) in the avail- 
ability of food material for the expansion of these organs. 
If both the pod length and the number of seeds developing are 
influenced by the nature of the inflorescence upon which they are 
