462 



course of the boundary line. Epecially from such geographical 

 localities a large material is necessary to determine the in- 

 fluence of the arctic climate on the plant, and the material 

 must, besides being of a botanical and meteorological nature, 



also contain more satisfactory in- 

 dications as to the nature of the 

 locality, than has hitherto been 

 the case with the spirit-materials 

 and herbarium-specimens in our 

 museums. — From Iceland the line 

 with probably go over the middle 

 of the Scandinavian peninsula in a 

 direction towards Sundsvall ; an 

 arctic deviation is found along 

 Dovre and Filefjæld in Norway, 

 and a corresponding temperate one 

 along the west-coast of Norway; 

 I am not able to say, how far to 

 the north this is found. After this 

 the line goes through Finland in 

 a direction towards the south 

 through Russia, Siberia and North- 

 America. — 



The shoot-structure in the 

 genus Pinguicula evidently varies 

 highly in the different species, 

 found in different climates, and 

 contains probably interesting devia- 

 tions from the well-known case in P. vulgaris. An extensive 

 comparison with respect to this point, will no doubt be valuable, 

 but such a thing is naturally beyond the limits of this paper, 

 I venture, however, in continuation of my treatment of the 

 morphological peculiarities of the arctic species, to mention 

 a single point concerning P. caudata. Taken together with 



Fig. 8. Pinguicula vulgaris. 



Very vigorous specimen with long 



leaves and flower-stalks. Øland. 



Thorsluude. June. About V:* 



natural size. (H. E. P. phot.) 



