868 



of a number of notes from Dr. Knud Poulsen on the nature and 

 duration of the snow-covering during the winters 1901 — 02 and 

 1902 — 03, and also relating to the time when certain piants began 

 to flower in the spring of 1902 and 1903. I take here the opportunity 

 of tendering my sincere thanks to Dr. Poulsen, a friend of many 

 years duration, for the great care and regularity with which he pre- 

 pared these notes, especially so since the vocation of physician allowed 

 him only a scanty leisure. In more ways than one, these notes 

 have been of great benefit in enabling me to grasp the peculiarities 

 of the Færoese vegetation. 



I have also been permitted to use some notes made by Mr. R. 

 Rasmussen, Fagralid on Bordo; these include records of the com- 

 mencement of tlowering periods, and also lists of piants in different 

 habitats on the Nordreoer (Northern Islands). 



Acknowledgements are also due to Mr. C. Jensen and Mr. J. 

 Hartz for valuable assistance with regard to the mosses and li- 

 chens mentioned in this paper; Mr. Jensen especially has aided 

 me greatly in identifying the numerous examples of mosses which I 

 collected. 



For most of the photographs reproduced here I am indebted 

 to Professor E. Warming and Dr. F. Borge s en. The former has 

 also placed at my disposal a number of notes, some taken on the 

 Færoes in 1897, others being annotations on the Danish edition 

 of this memoir. 



The material for this memoir was put together in 1897, but 

 its completion has been delayed for many reasons which need not 

 be detailed. To delay was easy, when one had a certain reluctance 

 in attempting a task which seemed unsatisfactory on account of the 

 insufficient preliminary study possible, in what was really a sojourn 

 of a single summer. 



As the work progressed this reluctance disappeared almost en- 

 tirely, and in recalling my stay on the islands I could not forget 

 the hearty hospitality and helpfulness extended to me everywhere 

 on these charming crag-girt isles. 



If in the smallest degree this paper will aid any efforts towards 

 the welfare and success of the islands, then I feel that in this way 

 it may in some measure repay my debt to their inhabitants. 



