124 



GROWTH OF PLANTS 



Evidently, after-ripening was complete after 43 weeks of dry storage. Lot 

 10 in Fig. 49 shows a similar relation between the period of dry storage 

 and degree of after-ripening. In this case, the later collection of seeds 



WEEKS IN GERMINATOR AT 25'C. 



Figure 49. Effect of weeks of dry storage at room temperature and date of harvest 

 on after-ripening of seeds of Impatiens halsamina. Lot 1 was collected August 14-19 

 and Lot 10, October 14-16. 



shows higher germination of the fresh seeds, perhaps due to partial after- 

 ripening on the plants; also it appears that after-ripening was not complete 

 after 34 weeks of dry storage. Kroeger also found that for fresh seeds or 



