EPIPHYTES. 353 



which they incorporate coine to them in the form 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 which is devoted to Drosera. At the 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. Keess and Will : " Einige Bemerkungen iiber fleischessende Pflan- 

 zen " (Botanische Zeitung, p. 713). 



1875. Canby : " Darlingtonia C'alifornica " (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 which 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-forniing ferment in plants, in Sitzungsberichte der physikalisch- 

 mediciiiisches 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: " Oil 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 chez le Nepenthes " (Comptes 

 Rendus, Ixxxiii. p. 1155). 



1876. Munk : "Die elektrischen und Bewegungsercheinungen am Blatter 

 der Dionsea muscipula." 



1877. Cramer : " Ueber die insectenfressenden Pflanzen." 

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



1877. Pfeff'er : " Ueber fleischfressende Pflanzen und iiber die Ernahrung 

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

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

 properties of carnivorous plants. 



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

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



1882. Schimper : " Notizen iiber insectenfressenden Pflauzen " (Botanische 

 Zeitung, xl. p. 225). 



Several jeiix 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 



