416 Canadian Record of Science. 



Erythronium grandiflorum, Psh., and Epipactis gigantea, 

 Hook., occur in Oregon and Washington Territory and 

 Japan, and may yet be found in British Columbia. Geum 

 calthifolium, Menzies, Geranium erianthum, D.C., and Swertia 

 perennis, L., are recorded from the " north-west coast" and 

 are not yet distinctly localized as from British Columbia. 

 M.enzesia ferruginea, Smith, Trautvetterea palmata, F. & M., 

 and Spiraea Aruncus, L., in Canada, belong to the west 

 coast flora, but are also eastei*n in the United States, and 

 have therefore not been added to the list. 



On the Amur there are 78 species not included in Japa- 

 nese lists, but which also occur in Canada, making in all 

 299 phsenogamous plants, ferns and equisetums common to 

 Canada, and Japan or the Amur. Of these 78 Amur plants, 

 5*7 are European and 30 are also Alaskan. Carrying the 

 analysis still further there are seven species not in Japan 

 but common to tbe Amur and Canada, and which in Canada 

 do not extend, so far as yet known, west of Ontario, and of 

 these seven all are European. Again, of these 78 Amur and 

 Canadian plants, there are four species exclusively in British 

 Columbia in Canada, but all northern in that province and 

 occurring in Alaska, whilst none of them are European. 



Considerable interest centres in these brief lists, the one 

 carrying us back to prehistoric times, the other illustrating 

 the influence, among other forces, of currents operating in 

 past ages as well as at the present day. The first list indi- 

 cates thirty-eight species found to be identical in Japan and 

 Canada, but which in Canada do not range west of the Pro- 

 vince of Ontario, and are chiefly not west of Lake Superior, 

 leaving thus an immense gap where they are absent. Two 

 other species, Phyllodice taxifolia, Salisb., a*nd Diapensia 

 Lapponica, L., which in Canada are northern in range, are 

 not, as yet, known west of Hudson Bay, and may be added 

 to the list of eastern species, making with the Amur 

 species the number forty-seven. Of these, thus common 

 to the eastern side of this continent and Japan and the 

 Amur, only one, Hepatica triloba, Chaix, occurs in Alaska, 

 and even there it is not known north of Sitcha. Now, if 

 the migration of European plants was eastward across Asia 



