468 Canadian Record of Science. 



range to the eastern portions of the Province of Quebec and 

 to the Maritime Provinces of Nova Scotia and New Bruns- 

 wick, though this large area is more conspicuous by the 

 absence of numerous species common in Ontario and West- 

 ern Quebec than by the presence of a distinctive flora. 



Erie Group. : — Including the large number of middle 

 temperate plants found in the south-western peninsula of 

 Ontario, and common to that area and to south-western 

 New York, and to Ohio, Pennsylvania and other Middle 

 States of the Union. 



St. Lawrence Group. — Embracing numerous species dis- 

 tributed generally throughout the St. Lawrence valley and 

 lake region, but not ranging west of the wooded country 

 immediately beyond Lake Superior and Lake of the Woods. 



Boreal Group. — Including in this those northern species 

 which occur near the shores of the Lower St. Lawrence, 

 around the coasts of Northern Michigan and Lake Superior 

 and north-westward, and in many cases also found on 

 the coasts and among the mountains, of British Columbia. 

 Though intermingling sometimes with them, they are not 

 sub-arctic plants, but genei*ally occur where the deep waters 

 of the sea or lakes or sufficient altitude supply a moderately 

 low temperature. 



Ontario Group. — Eepresenting a considerable class hav- 

 ing its maximum development in Canada in the Province 

 of Ontario, but also occurring in the eastern and middle 

 sections of the Province of Quebec, and southward in the 

 New England and Middle States. 



Prairie Group. — Embracing species familiar more or 

 less over the whole of the prairies of Manitoba and north- 

 westward, but probably limited in range over the dry 

 prairies of the western and south-western sections of Assini- 

 boia. 



Western Prairie Group. — Including species belonging 

 to the dry prairies to the west of Manitoba where the rain- 

 fall is limited, and extending thence westward almost to the 

 foothills of the Rocky Mountains. 



Western Central Group. — Including a very consider- 



