The Flora of Greenland and its Origin. 



33 



has indeed Op. c, but this is doubtless due to the above 

 noted poverty of this district), and that the subarctic-boreal 

 species rise from 4 p.c. in District VIII to 67 p.C. in District I. 

 This is what we should expect to find. An interesting 

 feature is that of the percentages for the common and 

 widely distributed arctic species (A2); these are most 

 numerous in Distr. W. VI and Va, and in E. IV and V, 



^VEST EAST 



vmvuviyaVbiyflin i n m w v vi vn "m 



Fig. 3. Curves shoving the percentages of the 3 phyto-geographical ele- 

 ments in the various districts. 



where we have thus conditions specially favourable for 

 them; the number falls from these two maxima both to 

 the south, where the minimum is reached in District I 

 (32 p.c), and to the north, with minimum in Distr. VIII 

 (39 p.c). This mode of distribution suggests that they are 

 correctly estimated as arctic species in a wider sense, as 

 compared with the true high-arctic on the one hånd and 

 the subarctic and boreal on the other. 



X. Endemic Species. 



In earlier times, a number of species were described 

 from Greenland as not known elsewhere. Most of these 



Vidensk. Selsk.Biol. Medd. VI,3. 3 



m 



i 



