THE WORK OF FLOWERS 



305 



Fig. 

 one of these the anthers are 



A/l^ 



-AN 



ST 



168, 



Twinberry, Checkerberry, Deer berry and Squaw -vine) 

 illustrates another method. Fig. 168 represents two 

 flowers cut open. In 

 placed high up in the 

 tube, while the stig- 

 mas are below: in the 

 other the reverse is 

 true. The bee, in 

 thrusting its long 

 tongue into A^ receives 

 the pollen on the lower 

 portion of the tongue 

 and, going to 5, de- 

 posits it on the stig- 

 mas: in going from B 

 to ^, it would receive the pollen on the upper portion 

 of its tongue and deposit it on the stigmas in the corre- 

 sponding position. On going from A to another flower 

 of the same kind, the pollen from A would not reach 

 the stigma, and, even if it should, experiments indicate 

 that it would not take effect: it is eflective only when 

 deposited on a stigma of corresponding position. A 

 similar arrangement is found in the cultivated Prim- 

 rose and in the Houstonia (also called Quaker Ladies 

 and Quaker Bonnets). 



The Sage has a neat device for the purpose of load- 

 ing the bee with pollen and preventing self-pollination. 

 Fig. 169 (^) represents the flower- tube cut open, 



, Partridge -berry flower cut open: the bee's 

 tongue receives pollen upon its lower portion in 

 a, from the anthers {an), and deposits it on the 

 corresponding stigma {si) in 6, and vice versa. 



