REST PERIOD STUDIES WITH SEEDS 

 TABLE 2. GERMINATION TEST WITH NEARLY RIPE SEEDS 



Ptelea trifoliata, Linn, and Vitus Labrusca, Linn, failed to grow from 

 slightly immature seeds. 



TABLE 3. GERMINATION TEST WITH FULLY RIPE SEEDS 



Aquilegia vulgaris, Linn., Cleome integrifolia, Torr & Gray, Coreopsis 

 tinctoria, Nutt., Papaver sp., Panax quinquefolium, Linn., Rubus Phoenicolasius, 

 Maxim., Rubus villosus, Ait., Rubus occidentalis, Linn., Rubus nigrobaccus, var 

 sativus Bailey, and Vitis Labrucsa, Linn., failed to germinate when planted 

 immediately after ripening. 



seeds planted at once after ripening. As a result of experience gained 

 in the work, it is believed that where a species will germinate when 

 immature, that it will also germinate with careful handling, imme- 

 diately after ripening, or, in other words, it has no rest period. How- 

 ever, it should be clearly understood that this statement is advanced 

 merely as an opinion, not as a fact that has been fully proven. 



Table 3 shows that out of eighteen species tested for germina- 

 tion immediately following maturity, eight, or 44.4 per cent, grew. 

 Since the list that grew immediately after maturity included annuals 

 and woody and herbaceous perennials, it may be regarded as 'i fairly 

 representative collection of plants, and even tho small, may be taken 

 as a strong indication that almost half of the species of wild and 

 cultivated seeds possess a rest period. 



Two preliminary experiments in etherizing seeds were performed. 

 First, nearly ripe seeds of barley (Hordeum sativum), and oats 

 (Avena sativa}, were exposed to ether fumes for twenty- four hours. 



