2 5 8 



BOTANICAL GAZETTE 



[OCTOBER 



In room temperature of 20- 2 5 C, growth of the leaf buds 

 usually became visible three to four days after the low temperature 

 coil was placed, the first indication being the outgrowth of one or 



T 



» 



/ 





Fig. 2 



more roots. If the low temperature coil was removed at this 

 time, shoots usually did not appear, or appeared in only a few 

 notches, the others being inhibited. If the low temperature coil 

 remained in place six to eight days, shoots as well as roots were 



