XI 



Warming's part of Ihe work has essentially consisted in giving 

 the anthors all sucli help and instruction as they have wished for. 



Some of the biological investigations, especially those concerning 

 the flower-biology of some of the families, Warming published 

 some years ago (1885, 1886) in Danish, in various papers to 

 which reference is made in the lists of literature. In the present 

 volume, as fai' as is possible, they have been revised and supple- 

 mented. 



The authors themselves are alone responsible for their own 

 papers. 



It is intended that these publications should he continued in 

 vol. XXXVII of Meddelelser om Grønland. 



Dr. С. H. Ostenfeld. Dr. Ewj. Warming. 



57 



