236 Canadian Record of Science. 



The general dip is towards the 3t. Lawrence Eiver and the 



small streams south of Seeley's Bay are tributary to the 



(Jananoque River and not to Cranberry and Whitefish 



Lakes. 



Flora. 



The flora of the country surrounding the lakes is essen- 

 tially that common to Central and Eastern Ontario and to 

 the vicinity of Montreal. Even the Western Ontario 

 peninsula would differ from it rather by the prevalence 

 there of western and southern forms than by the absence 

 of species found around the Rideau lakes. Eastern 

 Ontario is, however, the meeting ground of some outliers 

 from floras whose centres of development are elsewhere. 

 Among trees, Pinus Banksiana, the Northern Scrub Pine, 

 has made its way from higher latitudes to the southern 

 townships of the County of Renfrew, Pinus rigida, the 

 Pitch Pine, a denizen of the Atlantic Middle States, has 

 found a congenial home near Mallorytown and Gananoque 

 and in the township of Torbolton, Juglans nigra, the Wal- 

 nut, has wandered from its native wilds in the west to 

 Ottawa and Montreal, and Quercus Gastanea, the chestnut 

 oak, has ventured from the Middle and Western States, as 

 far east as Kingston. Among shrubs, Rhus copallina, al- 

 though somewhat common in the United States, is thus far 

 known in Canada only among the Thousand Islands, near 

 Gananoque, where its congener R. typhina attains a won- 

 derful development in numbers, whilst Pyrus sambucifolia 

 found along the more northerly portions of the United 

 States, occurs at Ottawa and Montreal and ranges thence 

 northwestward to the Rocky Mountains and northeastward 

 to Labrador. Among herbaceous plants there are also a 

 few outliers from other floras, and one or two species like 

 Podostemon ceratophyllum found at Ottawa, which have pro- 

 bably been overlooked elsewhere in Ontario. 



Are these outliers the advanced guard of their respec- 

 tive species paving the way for a more extended range by 

 becoming acclimatized, or do they constitute a stationary 

 force which physical and climatic influences have pre- 



