140 THE AMERICAN NATURALIST. (Vor. XXXVI. 


























































ege 
Bs 
2s 
BA 
E S in S i 

FiG. 31. — Se Ari des M 
fis oides Muhl. Disk curve of 139 heads collected on October 4. Classes 
49.158273 + -279452 ; mode = 49-50; o = 4.884653 + . 197602. 




























































2S 
z SZ 
RE 
EE 
2 a S & ^ = v 
Fic. 32. — A ster prenanthotdes Muhl. D 
e isk curve of 176 poss woes on October 8. Classes 
doubled. Mean = 45.778409 + .242280; mode = 45- = 4.777197 + .171318. 
