As an introduction to my description of the morphology, 

 anatomy and flower-biology of the Arctic Caryophylla- 

 ceæ, Professor С H. Ostenfeld has kindly prepared the 

 preceding systematic list of the species. 



My description, which follows, is based: — 



(1) On the investigations made in the Arctic Herbarium 

 of the Botanical Museum of the University of Copenhagen, 

 and on the alcohol material belonging to the same Museum, 

 which has, in the course of years, been collected by the nume- 

 rous Danish scientific expeditions to Greenland, (P. Eber- 

 LiN, N. Hartz, Th. Holm, Chr. Kruuse, Andr. Lundager, 

 С. H. Ostenfeld, L. Kolderup Rosenvinge, C. Ryder, 

 EuG. Warming, etc.). 



To this may be added some material which was col- 

 lected in Iceland by Helgi Jonsson and С H. Ostenfeld, 

 and in Scandinavia (Finmark, Dovre, Finse) by Eug. 

 Warming and others, and a small amount brought home 

 by Swedish Expeditions to Spitzbergen. 



(2) On the investigations and notes which I have made 

 on li\àng material in Greenland, Scandinavia and the Færoes. 



(3) On the numerous notes found in the literature on 

 the subject, especially in the Danish, Norwegian and Swe- 

 dish. With regard to these notes the reader is referred to 

 the list of literature at the end of this treatise. 



