162 



ascend beneath the upper lip. The connective of 

 very long, somewhat curved and attached to the 

 int near its center. It bears a pollen producing cell 

 ■emity and a sterile cell or no cell at all at its inner 

 projects backward and downward and partly closes 

 ie corolla. An insect, seeking food, alights on the 

 corolla and perceiving that there is honey in the tube, 

 L within to reach it. In so doing the head comes 



pward, it swinging on the filament as on a fulcrum, 

 lien bearing cell at the other end downward and it 

 back of the insect the pollen is dashed upon its hairy 



In the flower- of orchids a singular structure exists which may we 

 be called wonderful. Its purpose is inexplicable except on the thecu 

 of cross-fertilization. The pistil and stamens are united in and su] 

 ported by a single pedestal called a column. The pollen of each ce 

 is in a single mass, the grains adhering to each other as if held togetln 

 b\ a vi-eid substanee. These masses are called poll in in. General' 



in a small viscid disk. The position of these disks is such that when a 

 insect visits the (lower and seeks its nectar it is almost sure to stril 

 its head or antenna' against this viscid disk, and as sure as it does, tl 

 disk sticks fast to whatever part comes in contact with it. 



N hoi the iusecr flies away it draw- the wh.de pollen mass from tl 



the pollen mass has been drawn from the anther cell there is a defle 



2d from the cells (as if 



; they are sure to hit the bee and 

 jcies of ladyslipper, Cyprijicli'""' 

 ernous or sac-like lip of the flower, 

 iperture in its upper surface and 

 i it impossible to retrace its steps 

 iich it entered, on account of the 



