222 BOTANICAL GAZETTE [MARCH 
K QERNIWATI ON 
TTT 
Coo 
aie 0 40 60 100 150: 200 HOURS 
1.—Rate of germination at certain temperatures (° C. : of seeds of Amaranthus 
prea collected at Gary, Indiana, in 1915, and untreate 
% GERMINATION 
Mmtttth 
aon 
i 
Tt 
t 
t . 
1 20 30 3 TOO 7 “3 
2.—Rate of germination at certain temperatures (° C.) of seeds of Amaranthus 
seiroflenis collected at Gary, Indiana, in 1915, and ground with sand nine weeks before 
being set to germinate. 
