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University of Calif urnia Puhlications in Botany [Vol. 5 



to lack of fertilization, it can be safely concluded that the fall is due 

 to the effect of the injury. This minimum time is about seven days 

 for iV. Laiigsdorffii. It can be safely said, therefore, that any fall 

 occurring in less than seven days after injury to the flower near 

 anthesis is due directly to the effect of the injury. In cases where the 

 stamens or style are removed in flowers younger than those at anthesis. 



TABLE 2 



Effect of Different Types of Injury in Causing Flower fall in 



N. Langsdorffii var. grandiflora 



