394 



University of California Publications 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 ease 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 young flowers in two to 

 three davs. Removal of the stamens or stvle in buds causes fall in 



TABLE 4 

 Effect of Different Types of Injury in Causing Flower fall in F^lTfl 













Avg. No. 



No. 

 flowers 



Size or 





Injury to 





days before 



condition 









fall of 





of flowers 













remaining 







Calyx 



Corolla 



Stamens 



Pistil 



Pedicel 



organs 



/ 9 

 a { 6 



1I-VIII 



i cut 



1 cut 



all cut 



style cut 





1 



XI-XV 



i I 



l ( 



(( 



tt 





no fall 



*>« 



III -VII 





£ cut 



1 ( 







1 



VIII -IX 





( ( 



tt 







no fall 



c 10 



V-VIII 





i I 









" 





" 9 



I 



all cut 











o 





7 



II 



( t 











2 





3 



II 



1 1 











no fall 



d- 



4 



III-IV 



1 1 











3 



6 



III -IV 



1 1 











no fall 





1 



V 



t t 











2 





4 



V-VII 



i I 











no fall 





. 2 



IX 



" 











1 1 





' 7 



III-IV 







1 1 







o 





1 



V 







1 1 







5 



e- 



3 

 6 



V 

 VI-VII 







t i 



I i 







no fall 



'" 



f 5 



II-VIII 









1 1 





2 



I 4 



VH-VIII 









1 1 





no fall 





' 1 



II 



1 slit on 2 



sides to 



base 



1 slit on 2 



sidus to 



base 









5 





1 



II 



t < 



1 1 









no fall 





9 



IV-VII 



i t 



tt 









" 



g< 



9 



2 



II 



II-IV 



2 slits on 2 



sides to 



base 



2 slits on 2 

 sides to 



base 



1 1 









1 

 4 





5 



V-VII 



1 1 



1 1 









no fall 





5 



II-V 



punctured 



on both 



sides 



punctured 



on both 



sides 





ovary 

 punctured, 

 small hole 





o 



h- 



3 

 3 

 3 



L 3 

 15 



VI-VII 

 VII -XI 



Il-III 



VI -X 

 III-XII 



1 1 



1 1 



i t 





( i 

 1 1 

 1 1 

 1 1 



1 slit to 

 base 



no fall 

 2 



Q 



no "fa 11 



i ■ 



5 

 I 













punotur'd 



many 

 times 



1 





f G 



XIV 



i cut 







capsule 





4 



,i 



[. 



XIV 



" 







i cut 





no fall 



