Carnivorous Plants 



XV — 



Contents 



Chapter XIV: The UTRICULARIA TRAP 



General description 233 



Terminology 233 



Early ideas 234 



Benjamin to Cohn, Darwin . . . 234 



Later advances 237 



Brocher, Ekambaram, Withy- 

 combe 236 



Merl, Czaja 238 



Hegner 240 



Watertightness of trap 242 



The two valves 242 



Anatomjf and 



Histology 242 



Walls 243 



Glands 244 



Path of fluid through walls .... 244 



Cytology 245 



Entrance 245 



Development 246 



Threshold 246 



Pavement 247 



Velum, origin of 247 



Door 248 



Histology 249 



Contact with threshold 250 



Relation of velum 251 



Sucking in of prey 251 



Velum 253 



GoEBEL 254 



Roger Fry 254 



Mechanical types of trap as to posture 



of door and depth of entrance . . 254 



Utricularia vulgaris 254 



Utriciilaria capensis 255 



Utricularia monanthos 256 



Polypompholyx 257 



Varieties of traps :- 



With short tubular entrance ... 257 



With long tubular entrance .... 258 



Digestion 263 



Prey and its fate 265 



Appendix: models of the trap .... 266 



Literature 267 



