FLOWER BUDS OF APPLES 287 



31. Sanderson, E. P., Conditions which Affect the Time of the 

 Annual Flowering of Fruit Trees: Wis. Exp. Sta. Bull. 137, pp. 

 1-7, 1906. 



32. Sorauer, P., A Treatise on the Physiology of Plants, pp. 147- 

 148. 1895. 



33. Vincent, M., Development of Fruit Buds in Some of Our 

 Orchard Fruits, An unpublished thesis written at I. S. C. Ames, 

 Iowa. 1884. 



Department op Botany, 

 Iowa State CoLU'XiE. 



