158 THE CANADIAN NATURALIST. [June 



Ramiriculas Cymhalaria, as above stated, has been gathered at 

 Fredericton. But I am not aware of the existence of any others 

 of the list inland, except the sub-maritime Aster Ridula and 

 AtripJcx hastafa. 



In concluding this division of the subject, it may be added, 

 that oar present knowledge of Acadian botany would lead us to 

 suppose that the Continetital type, besides occupying the southern 

 half of tlie Plateau of Continental Acadia, also spreads throughout 

 the valley of the St. John, and its tributaries, to the heart of the 

 Southern Hills, and reappears in the valley of the S. W. 

 Miramichi. That the Boreal type lies around it to the north- 

 east, and to the south-east, as far as the outlet of the St. John 

 River. Here it mingles with the few sub- Arctic species which 

 still hold their ground along this coast, and in like manner 

 flourishes in company with these same species, on the low points 

 of land jutting into the Gulf of St. Lawrence. The sub-Arctic 

 species form, as it were, a fringe to the general vegetation of the 

 country skirting the shores of the Gulf of St. Lawrence and the 

 Bay of Fundy. The occurrence of an Alpine group in the 

 northern highlands seems as yet scarcely established, since, on 

 the highest of those hills, Prof. Bailey met with but one species 

 which could be referred to this type, viz., Vacclnium uliginosum. 

 The New England type is widely spread throughout Acadia, 

 but appears to be more espocially prevalent in the south-western 

 counties. Several species, such as the Blue-bell (^Campanula 

 rotundifoUa) , and Hemlock (Abies Canadensis), are reported 

 by Mr. Fowler as scarce or wanting on the " North Shore ;'' and 

 the Cedar (^Thuja Occidentalis) appears to be a rare tree in 

 Nova Scotia, and even entirely wanting in most parts of that 

 Province, 



Special Causes which havk Operated upon the 

 Distribution of Plants in Acadia. 



Beside two agents, Winds and Migratory Birds, which have 

 had a world-wide influence in spreading vegetation from one 

 region to another, there is a third which, from the important 

 part it has played in modifying the flora of Acadia, deserves 

 special attention. This is the floating ice, and drift-wood of the 

 Polar Current, and of the St. John River. 



