In the present paper I have given an account of the growth- 

 forms and of the anatomy of the root, stem and leaf, and also of 

 the flower-biology, of some Arctic and Subarctic Rosaceœ in a 

 similar manner to my work on the Arctic Ranunculaceœ (vol. 36). — 

 In addition to the alcohol-material in the Bot. Museum in Copen- 

 hagen and the herbarium in the same place I have also made use 

 of the literature in order, as far as possible, to collect in one place 

 what is known about these plants. 



1 wish to convey to Professor Warming my thanks for the readi- 

 ness with which he has placed at my disposal his notes from his jour- 

 neys in Arctic Norway and Greenland. Some of the figures are 

 drawn by him and a good many of these have not previously been 

 published. The rest of the figures, with the exception of figs. 8 

 and 26, have been drawn by myself. 



The following species have been investigated: — 



Potentilla palustris p. 6. 



tridentata p. 15. 



pulchella p. 21. 



nivea p. 27. 



Vahliana p. 33. 



emarginata p. 36. 



maculata p. 42. 



anser i na p. 47. 



Sibbaldia procumbens p. 54. 



Dryas octopetala and D. integrifolia p. 60. 



Rubus saxatilis p. 74. 



chamœmorus p. 82. 



arcticus p. 91. 



Alchimilla alpina and A. færoen sis p. 99. 



— vulgaris p. 105. 



Sorbus americana p. 108. 



1* 



