414 THE CANADIAN NATURALIST. [Dec. 



features in the distribution of our Canadian plants, point out a 

 few of the species which seem to be restricted, or nearly so, to 

 each province. 



There appears to be a very large number of Upper Canadian 

 species which have not been met with in Lower Canada. Many 

 of these, however, occur in Maine and Vermont, and will, I doubt 

 not, be observed by collectors in the eastern townships. Still, 

 there are a number in the upper province which, judging by the 

 range ascribed to them by Gray, are not to be looked for far 

 beyond the dividing-line between the provinces. Among these 

 are such plants as Hydrastis Canadensis^ Alsine Michauxii, Poly- 

 gala senega J Astragalus Canadensis, Myriophylhimlietero2:)liyllum, 

 Lonicera ohlougi/olia, Vihurnum puhescens, Liatris cylindracea, 

 and Aster ptarmicoides. Plnus rigida appears to be of very 

 restricted occurrence, — the only reliable locality of which I know 

 being the Thousand Islands ; and recorded stations for, among 

 others, Hellanthemuyn corymhosum, Rhus aromatica, Geum tri- 

 Jiorum, Valeriana sylvatica, PycnantJiemum lanceolatiim, and As- 

 plenium eheneum (for which fern I may here mention the neighbor- 

 hood of Kingston as a third Canadian locality), are as yet rare. 



In Lower Canada there are a number of species which may be 

 regarded as confined to that province, others which range for a 

 considerable distance along the St. Lawrence towards Lake On- 

 tario, and not a few which appear on the shores of Lake Superior 

 though not found elsewhere in Upper Canada. Thus Draha verna 

 Stellaria crassifoUa, Astragalus alpinus, Oxytropis Lamherti 

 Cornus suecica, Rliodora Canadensis, and PlatantJiera jimhriata. 

 have no recorded Upper Canadian stations; and Corydalis glauca 

 Viola SeUdrkii, Claytonia Caroliniaiia, Betula alba ysly. p)oj)u- 

 lifolia, with others, have but a limited range in the triangular 

 section of country between the rivers Ottawa and St. Lawrence. 

 As to those eastern species which are common to Lower Canada 

 and the Lake Superior country, in addition to Allium Schoeno- 

 prasum and Botrycliium Lunaria already noted, it will not be 

 necessary here to refer to more examples than Anemone parvijlora, 

 Draha arahisans, Potentilla tridentata, P. fruticosa, Gentiana 

 sap>onaria var. linearis, and Plnus Banksiana. 



I shall not at present farther illustrate these two floras, but hope 

 to recur to the subject on some future occasion, and to be able to 

 give fuller and more definite details. 



