44 



H. G. SIMMONS. 



[SEC. ARCT. EXP. FKAM 



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When we give the group of more or less ubiquitous species the 

 largest possible range, so as to contain 90 species out of the 152, we 

 find To of them in all the three districts here specially in question; 4 are 

 absent from Ellesmereland, 13 from N. W. Greenland. The last number 

 will, however, be considerably reduced by further research. If, on the 

 nl her hand, we take the group of american species in its widest com- 

 prehension, embracing 44 species, we get them thus grouped: in all three 

 regions 23; in Ellesmereland and N. W. Greenland 7; in Ellesmereland 

 ;uid N. E. Greenland 2; in Ellesmereland alone 8; moreover 4 species 

 nut yet found in Ellesmereland but in N. W. Greenland (I) and as well 

 in N. E. Greenland (3). 



These figures show clearly a gradual decrease of the number uf 

 ;iiiii-nrriii species to the east such as, a priori, we had to look out fur: 

 .UK] Hi-- -nine is the case with the number of plants of decidedly nine- 

 IM-MII origin. Of these. And rosace septentrionalis, Chrysosplenium l- 

 irniifolinin. Alsinr Rossii, and Carex membrcmopacta have only reached 

 'ward tu Ellesmereland. To these may he added Saxifray Jlir- 

 'xln*. which may have reached N. E. Greenland from the east; J)rf>n 

 subcapitata, nut yet known with certainty in Greenland: and direx 



