116 THE AMERICAN NATURALIST. [Vor. XXXVI. 




















































































































































































































































































Li 
B 5 
Lp SR 
-e —— 
E a summ UR 80 
SN RS a ot BE 
ae 
a A Bi = 
n 
AE E A 3 70 
= 6) 65 
uo e i) 
55 » 
35 
s 
59 50 
30 wT b: 
b 40) 
35 
20 
30 30 
25 25 
t5 
20 
10 
15| 15 
0 10 
5 
5 5 
E 50 
3l 5l E 5 » 
Fic. x. Fic: 2. Fic. 3. 
Fic. 1. — Aster shortit Hook. Bract 6h Cl loubled. Mean = 36.800384 + 
7121; ierat: 36-37; 09 — 3. ceo + 
Fic. 2. S shortii Hook. Ray curve Pa ar bedda Mean = 14 + .068448; mode = 13; 
= 1.525592 + .048400. 
Fic. m Aster storti Hook. Disk f 226 head 

= 1.513025 + .o48001. 
Mean = 22,053097 + .067885 ; mode = 22 ; 
