394 



University of California Piihliaiti-ons in Botany [Vol. 5 



transverse cut through the entire flower which passes through the 

 middle of the ovary causes fall in one to two days. A similar oper- 

 ation in the case of maturing fruits changes the date of fall to 

 four to eight days. Removal of half the corolla and all the stamens 

 causes fall of buds in one day and the fall of 3'oung flowers in two to 

 three days. Removal of the stamens or stA'le in buds causes fall in 



TABLE 4 

 Effect of Different Types of Injury in Causing Flower fall in FiH179 



