42 



ELEVENTH REPORT. 



TABLE I. — Concluded. 



SS 



111 



112 

 113 



114 

 115 

 116 



117 

 118 

 119 

 120 



Name. 



Linnea borealis 



Viburnum pauciflorum . 

 Viburnum cassinoides.. 



I. Arctic. 



X 



Campanula rotundifolia 



Solidago macrophylla tliyrsoidea. 

 Solidago Cutleri 



Gnaphalium supinum. 



Arnica mollis 



Prenanthes nana 



Prenanthes Bonttii.. . 



X 



X 

 X 





X 

 X 

 X 



X 



E 

 < 



w 



X 

 X 

 X 



X 



X 



x 



o 



X 



X 

 X 



II. American. III. IV. Maine 



X 

 X 

 X 



X 



X 



E 



X 



X 

 X 



X 

 X 

 X 



X 

 X 

 X 

 X 



X 

 X 

 X 



X 

 X 

 X 



X 

 X 

 X 

 X 



C3 



o 



o 



X 



x' 



X 

 X 



a. 

 in 



X 



x' 



SUMMARY. 



*The sequence and nomenclature of Gray's New Manual (10) h.ave been followed. The writer regrets that he has not had access 

 to recent contributions to the flora of the arctic regions; however, such may be expected to furnish further detail in sub.tt.antia- 

 tion of the conclusions drawn above. 



I. — ARCTIC DISTRIBUTION, 



Of these 118 species under consideration 91 or 77% are recorded within 

 the Arctic Reahn. The regional distribution of these arctic forms is signifi- 

 cant and vi^e may proceed directly to their consideration. 



1. Arctic Europe possesses 67 (56%) of these 91 forms in common with 

 Ktaadn (Table I) which suggests beyond the fact of the closest arctic regional 

 affinity, that Arctic Europe possesses today the richest arctic flora. 



From Table Hit is clear that Arctic Europe shows the closest floristie 

 affinity %vith Greenland (80%) and Eastern America (76%); while with 

 Asia (50%) and Western America (46%) this relationship is much less pro- 

 nounced. Thus Arctic Europe evidences a much closer floristie alliance 

 with regions to the west than to the east, a relation which apparently weakens 

 in either case directly as the distance. 



