On Floivers and Insects. 



qucnts' moist places, generally on mountains, the 

 leaves are concave with incurved margins, and the 

 upper surfaces are covered with two sets of glan- 

 dular hairs. In this case the naturally incurved 

 edges curve over still more if a fly or other insect 

 be placed on the leaf. 



7. Another case is that of the Bladderwort 



Fig. 26. COMMON BLADDERWORT (Utricularia vulgaris). 



(fig. 26), an aquatic species, which bears a number 

 of little bags which have been supposed to act as 

 floats. Branches, however, which bear nobladderfloat 

 just as well as the others, and there seems no doubt 

 that the real use of these little bags is to capture 

 small aquatic animals, which they do in considerable 

 numbers. The bladders, in fact, are on the prin- 



