EPIPHYTES. 353 



which they incorporate come to them in the forui of dust, which 

 subsequently dissolves and is absorbed. The sources of their 

 carbon and nitrogen have already been sufficiently explained. 



1875. Darwin: " Insectivorous Plants." A work of 462 pages, more than 

 half of wliich is devoted to Drosera. At tlie close of his exhaustive discussion 

 of his experiments upon this plant, Mr. Darwin says : " I have now given a 

 brief recapitulation of the chief points observed by me with respect to the 

 structure, movements, constitution, and habits of Drosera rotundifolia ; and we 

 see how little has been made out in comparison with what remains unexplained 

 and unknown." 



1875. Reess and Will . " Einige Bemerkungen iiber fleischessende Pflan- 

 zen " (Botanische Zeitung, p. 713). 



1875. Caiiby : " Uarlingtonia Californica" (Proceedings American Asso- 

 ciation, p. 64). 



1875. Cohn : " Ueber die Function der Blasen von Aldrovanda und 

 Utricularia" (Beitrage zur Biologic der Pflanzen). 



1875-6. Morren published in the Bulletin of the Royal Academy of Bel- 

 gium the results of experiments wdiich may be interpreted as showing that 

 the plants derive no benefit from their insects. 



1875-6. Gorup-Besanez and Will published some observations regarding 

 a pepton-forming ferment in plants, in Sitzungsberiuhte der physikalisch- 

 mediciuisches Societat zu Erlangen. 



1876. Francis Darwin : " The process of aggregation in the tentacles of 

 Drosera rotundifolia " (Quarterly Journal of Microscopical Science, xvi. 

 p. 309). 



1876. Sydney H. Vines: "On the digestive ferment of Nepenthes" 

 (Journal of Anatomy and Physiology, xi. p. 124). 



1876. Faivre : " Recherches sur la structure, le mode de formation, et 

 quelques points relatifs aux fonctions des urnes ehez le Nepenthes" (Comptes 

 Rendu.?, Ixxxiii. p. 1155). 



1876. Munk : " Die elektrischen und Bewegungsercheinungen am Blatter 

 der Dionoja mu.scipula." 



1877. Cramer : " Ueber die insectenfrcssenden Pflanzen." 

 1877. Aschman : " Les plantes insectivores," Luxemburg. 



1877. Pfeffer : " Ueber fleischfressende PHanzen und iiber die Ernahrung 

 durch Aufnahme organischer Stoffe uberhaupt " (Landwirthsch. Jahrb. v. 

 Nathusius, p. 969). An excellent account of the mechanism and absorptive 

 properties of carnivorous plants. 



1879. Drude : " Die insektenfressenden Pflanzen." A full and interesting 

 examination of the subject in Schenk's Handbuch der Botanik. 



1882. Schimper : " Notizen iiber inseotenfressenden Pflanzen " ( Botanische 

 Zeitung, xl. p. 225). 



Several jeux d' esprit have been published, in which the remarkable proper- 

 ties of a few humble plants have been exaggerated into accounts of man- 

 catching and man-eating trees of large size. 



•23 



