
No. 422.] QUANTITATIVE STUDY OF VARIATION. 
145 
TABLE F. — Constants OF Rays or Four PICKINGS OF 
ASTER PRENANTHOIDES 
Munr. 

| 117 CAPITULA, 
143 CAPITULA, | 
139 CAPITULA, | 


| COLLECTED COLLECTED | COLLECTED 
| SEPTEMBER 27. | SEPTEMBER 30. | OCTOBER 4. 
pec T 
Mean |^ 30.769230 | 28.706293 28.251798 
| | | 24-2 
26- | 
Mode { mise | 30-33 . | 1 28-2 
| 32-33 
A. D. 3.353057. — 2.9917 36 3.012680 
es ccu 3-985839 | 3-569141 3.501476 
FEAD + 2.688448 + 2.407386 | + 2.361745 
P. E. M. + .248547 | + .201316 | + .200320 
RE. + .175749 | + .142351 | + .141641 
CV; 12.953945 | 12.4333306 | 12.393818 

176 CAPITULA, 
| COLLECTED 
OCTOBER 8. 
26.335227 
| 
| 26-27 
| + .108234 
| 11.431865 

The variations of the disk in the four collections may be 
compared in the following table. 
TABLE G. — CONSTANTS OF Disk FLORETS OF Four PICKINGS OF 
ASTER PRENANTHOIDES MUHL. 









117 CAPITULA, 143 CAPITULA, 139 CAPITULA, 176 CAPITULA, 
COLLECTED COLLECTED COLLECTED COLLECTED 
SEPTEMBER 27. | SEPTEMBER 30. 
Mean 56.427350 | 51713286 | 49.158273 | 45.778409 
Mode 1 56-57 f 45-46 49-50 45-46 
60-61 51-52 
A. D. 3-353057 3.925179 3.619481 3.750581 
ce pM 3.983839 4-994779 4.884653 4-777197 
P. E. A. D. + 2.688448 + 3.368978 + 3.294698 + 3.222219 
P. E. M. 4+ .248947 | + .281728 | + .279452 | + -242280 
FEY. + .175749 + .19921I + .197602 + .171318 
C. X. 12.953947 9661212 | 9.936585 10.435481 

4. Correlations. The correlation surfaces for rays and bracts, 
in the four collections, are shown in F igs. 33, 34 35» and 
36, and for rays an 
d disks in Figs. 37, 38, 39, and 40. The 
coefficients of correlation are arranged for comparison acum 
following table. 


