392 



University of California Publications 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 N. Langsdorffii. 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 















Avg. No. 



No. 

 flowers 



Size or 







Injury to 





days before 



condition 

 of flowers 











fall of 















remaining 







Calyx 



Corolla 



Stamens 



Pistil 



Pedicel 



organs 





'10 



II- VII 



all cut 



all cut 



all cut 



all cut 





1 





10 



VII-XI 



1 1 



( t 



" 



" 





2 



a - 



10 

 2 



XII -XIII 

 XIV 



i i 

 1 t 





1 1 



1 1 



1 1 





3 



no fall 





; 4 



MI 



i cut 



1 cut 



t i 



style cut 





7 





3 



III -VII 



.<< 



1 1 



i i 



< t 





7 





3 



V1II-IX 



i i 



i t 



1 1 



i i 





7 



b 



5 



XI -XII 



1 1 



i i 



1 1 



i . 





no fall 



2 



XI-XII 



1 1 



i t 



it 



style and 





5 















part of 



















ovary cut 









; 3 



XIII-XIV 



" 



i 1 



i i 



i\ 





4 





5 



V-VII 





i cut 



" 



,1 style cut 





7 



c- 



VIII-IX 





1 1 



1 1 



1 1 





6 



2 

 . 3 



XI 





1 1 



t , 



(i 





9 





XII 





1 1 



1 1 



a 





no fall 





' 4 



I 



all cut 











3 



d 



1 

 .12 



II 



III-XII 



1 1 











no fall 

 1 1 





' 2 



V-VII 



sliton sides 

 to base 



2 slit on 

 2 sides 

 to base 









7 



a 



8 



III-XI 



1 1 











no fall 





3 



I 



. 2 



r 5 



II 



V-VII 

 IX 



XII 

 IX 



1 1 





anthers 



ovary slit 

 tt 



a 





3 



5 



2 



5 



10 



f 











all cut 









2 

 3 



V-VII 







all cut 







7 





VII-X 







1 1 







9 



f 4 



VIII 









stigma cut 





9 



g 2 



V-VII 









style cut 





7 



I 2 



VII-X 









" 





10 



r 4 



XIV 



all cut 







all cut 





no fall 



h \ >> 



XIII 



i cut 







i cut 





o 



XIV 



t i 







< t ' 





no fall 



{ 4 



XIII-XIV 



slit to base 







slit to base 





t < 



flO 



II 











slit to base 



it 



1 3 



IX 











1 1 



(i 



,|. 



I -VIII 











1 cut 



i through 



it 



!" 



1I-XII 











2 cuts 



i through 



1 1 



