Særtn'k af Botanisk Tidsskrift. 30. Bind. 2. Hæfte. Kobenhavn 1910. 



Arbejder fra den Botaniske Have i København. Nr. 52. 



NEW Y 



Observations on the corrugated nm of botamcai 



Nepenthes. 



(With 16 Figures in the Text and a Danish Summary). 



By 

 Fr. Heide. 



GARDEN, 



1 he leaf of Nepenthes has always attracted the attention of 

 morphologists and in the course of time the most various morphological 

 explanations have been tried on this organ; nevertheless we must 

 confess that the results have always been more or less problematical, 

 and the opinions on this difficult subject differ very much, hi 

 some of these efforts to find new morphological explanations a few 

 of the pitcher-organs, as the lid and the lateral wings, have been 

 assumed to be able to yield a sort of foundation, and the anatomy 

 as well as the mode of development of these organs have therefore 

 been studied more in details. This has never been the case with 

 the corrugated rim. The interesting pitcher-margin has always 

 been treated most superficially, and what we find about it in 

 literature is imperfect or erroneous. I have felt inclined to publish 

 my results so much the more as former deficiencies and errors 

 on this point have not been altered in a modern work: "Nepen- 

 tiiaceae". by Dr. Macfarlane, Octob. 1908, a book which other- 

 wise will be reckoned among our best compendia in the study of 

 Nepenthes. 



The materials for my investigations are fetched, partly from 

 the species and hybrids growing in the Botanic Gardens of the 

 University {N. Allardi, N. Dormanniana, N. gracilis, N. Mastersiana, 

 N. mixta, N. Paradisiae) partly from the collections in the Copen- 

 hagen Botanic Museum {N. melamphora and N. ampullaria). 



I beg to express my most respectful thanks to Professor Eug. 

 Warming for the great interest, which he has ahvays shown to my 

 work. Likewise I wish to thank Professor V. A. Poulsen for his 

 many valuable hints. 



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