i 9 i S ] ROSE— DELAYED GERMINATION 443 



5. Certain late varieties of western-grown garden peas germi- 

 nate poorly. This is shown to be due to one or both of two causes: 

 (a) actual frost injury to the embryo; (b) the presence of fungi 

 on or in the seed coat or inside of it. 



6. Seeds of 51.4 per cent of all species and varieties examined 

 showed fungi on the seed coat within two days after being put to 

 germinate. 



The writer is indebted to Dr. William Crocker for many 

 suggestions and criticisms. 



University of Chicago 



LITERATURE CITED 



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3. Bolley, H. L., The agricultural value of hard seeds in alfalfa and clover 

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4. , Work of the pure seed laboratory. North Dakota Exp. Sta. 



Rept. 41-80. 1912. 



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