No. 422.] QUANTITATIVE STUDY OF VARIATION 137 






















































































































































































































25 - [T 
20 
20| La 
BITS 
$52 Hi 
HRS i 
m ITI Mi 
of T T id 
B MILL | 
i T d 
t HET 
a Hiii 
5 TIT T 
HT TM 
! IT TE 
HT TH 
3 TEL TET 
! p 50 60 
p 3) lj 5i él 
Fic. 22 
40 50 60 70 
Fic. 21. 30 
7 ELEELE] 25 
L1 a 
20 San ee 20 
EETTIT u PPEIT 
10 TANER 10 ELIT 
EELELIL. a2 8 Sage 
— = —_ 
5 INI E] 3T TT * 
30 zy) 60 
3 4 Ši 6i 30 ug 59 
FIG. 23. Fic. 24. 
Classes 
Fic. 21. — Aster prenanthoides Muhl. Bract curve of 117 heads collected September 27. 
doubled. Mean = 0256 +. o; mode = 49-50; 4 = 5.524237 + -243626. 
G. 22 ster p : thoi z Š Muhl act cu curve of 143 heads collect on September 30. Classes 
o. 
- 

č 723. I 
G. 23. — Aster prenanthoides Muhl. Braet curve of 1 
doubled. ean = 43.834532 + tah .840; modes, 44-45; 
Fic. 24. — Aster enanthoides Mu h Bract curve. rs 176 he —€— grate 
doubled. Mean = 41.92045 modes -34s P o»: 49-50 4.8896 
i 

