92 PLANT STRUCTURES 



59. Carnivorous plants. — Certain green plants, growing 

 in situations poor in nitrogen-containing salts, have learned 

 to supplement the proteicls 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 j^lant 

 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. 



