1898-1902. No. 2.] VASCULAR PLANTS OF ELLESMERELAND. 15 



I owe a great debt of gratitude to the Keeper of the herbarium at 

 the Royal Gardens at Kew, Mr. Hemsley, and to the first Assistant Dr. 

 Staff, as also to the Assistants at the Botanical Department of the 

 Natural History Museum of London, Messrs Britten, Baker and Rendle, 

 who all, with the greatest good will, facilitated my work when I was 

 studying the important collections from the English arctic expeditions 

 with their treasure of original specimens of the species established by 

 Rob. Brown, Richardson, W. J. Hooker, and others. 



To the Secretary of the Linnaean Society, Mr. B. Daydon Jackson 

 I tender my sincerest thank for his kindness in letting me examine some 

 species of importance for my work in the herbaria of Linnaeus and 

 J. E. Smith, and also some small, but interesting, arctic collections be- 

 longing to the Society. 



Further I am greatly indebted to Professor Warming, who put 

 at my disposal the rich arctic herbarium of the Museum of the Uni- 

 versity at Copenhagen, and to my old friend Inspector Ostenfeld, the 

 author of the Flora Arctica, who was always willing to let me profit 

 by his comprehensive knowledge of literature concerning arctic plants, 

 during the long time in which I was occupied comparing my material 

 with the Copenhagen collections. 



To the Director of the Botanical Department of the State Museum 

 at Stockholm, Professor Lindman, I am indebted for the loan of some 

 inportant plants from that Museum, and my old and honoured friend, 

 Professor Nordstedt of Lund has now, as in so many previous in- 

 stances, helped me in procuring literature and in other ways. I have 

 to thank my friend. Professor Murbeck of Lund, not only for some 

 valuable hints for this work, but also for all that I have learnt from 

 him in systematic botany in bygone years. To my friend, Professor 

 WiLLE of Kristiania, I am indebted on many grounds, and now as well 

 for the trouble he has, as Editor of the "Report", taken in getting this 

 treatise printed. Finally I have to acknowledge my debt of gratitude 

 to Mrs. E. Fearenside, who has kindly revised the English, and to Miss 

 L. Bergklint, who has made the drawings and photographs for the 

 present paper, and to Mr. Robert Larsson, who has helped me to read 

 the proofs. 



Lund, Sweden. March 1906. 



