Chaf. ix Nutrition of Heterotrophic Plants 441 



are absorbed by the plant, as by Drosera and the other 

 species described. Some other species of Utricularia, which 

 are terrestrial in habit, were described by Darwin and 

 subsequently in 1887 by Schimper. They were found to 

 possess similar mechanisms to the aquatic species. 



In 1874 Warming described another insect-catching plant, 

 Genlisea omata, which resembles Utricularia in its methods 

 of appropriating animal matter. Darwin investigated three 

 other species of Genlisea. 



