284 Proceedings Port. Son. Nat. Hist. 



Eriophoriuii callifrlx Chainaedaplnie calyculata 



Carex jiaiipercula, Vaccinium Oxycocciis 



var. irrigua Lonirera caeruha, 

 Smilacina trifolia var. adrescens 



SWA .MPS 



Carex GoodenoivH Epdohiuni p<dustre 



Mijrira Gale Mem/autJies irifoliafa 



Geot'p III. Caxadiax-Allegiiaxian Plants 

 As would be expected from the location of the eastern 

 Penobscot Bay region, the greater part of its flora consists 

 of Canadian-Alleghanian species. The 388 plants which be- 

 long to this transitional gronp comprise (32 per cent of the 

 native flora and contribute the most conspicuous features to 

 the vegetation of the region. The two elements which go 

 to make up this group are by no means distinct. In fact in 

 most instances it is impossible to say with perfect accuracy 

 whether a species is Canadian or Alleghanian since its dis- 

 tribution docs not coincide with either of the arbitrary zones 

 of Merriam. For the purpose of the present discussion, 

 however, it is not necessary to draw hard and fast lines be- 

 tween these two elements. The significant point for us is 

 that the species of this group extend northward to eastern 

 Canada, northern Xew Brunswick and Xova Scotia, or even 

 Newfoundland. 



Although originally applied to the so-called life-zones, the 

 terms Canadian and Alleghanian are in more frequent use 

 at the present time in referring to two of the well marked 

 forest areas of the United States, As Cooper emphasizes', 

 eastern North America is divided into two great phytogeog- 

 raphical areas — the eastern deciduous forest and the north- 



1. Cooper. The Climax Forest of Isle Rovale, Lake Superior, and 

 its Development. Bot. Gazette 55: 1-44,115 140,189-235 (1913). 



