92 PLANT STRUCTURES 



59. Carnivorous plants, Certain green plants, growing 

 in situations poor in nitrogen-containing salts, have learned 

 to supplement the proteids which they manufacture by cap- 

 turing and digesting insects. The various devices employed 

 for securing insects have excited great interest, since they 

 do not seem to be associated with the ordinary idea of plant 

 activities. Prominent among these forms are the bladder- 

 worts, pitcher-plants, sundews, Venus's fly-trap, etc. For 

 further account and illustrations of these plants see Plant 

 Relations, 119. 



