ST Ree a ee etter Sp Ver aietiee ah yetee 7 2E7> 
ERE aee near ge 
ON RUBUS IDEUS. 113 
North American type—the erect stems, g 
often pinnate leaves, white-felted on the under-side ; the downy fruit 
habj ‘ : 
8 spec 
with R. Ideus, L.  R. occidentalis, L., is marked:by its dark-coloured 
fruit; but according to Arrhenius, the variety maritimus of R: 
Ideus, L., when cultivated, sometimes acquires dark-coloured fruit. 
The same variety has the acini furrowed on their outside, which is 
also the case in some species of the North American type (e.., R, 
Nutkanus, Moc. E ‘ it 
There can then scarcely be any doubt that 2. Ideus, L., is much 
more closely related to certain North American species than to any of 
the European ones. It now remains to try to discover whether this 
cles is descended from any form still living in North America, or 
Whether it had its origin in some other region of the world. If the 
our species had developed itself rigosus, Michx., or R. borealis, 
Spach., and that during its spread over Asi pe it had by 
degrees been changed into deus, L. Neither the great ce 
America: (comp. F. W. ©. Areschoug,  Bidrag till denSkand. 
Veuetiteeee Historia” $6 Contributions to the History of the Scan- 
avian Vegetation”), in “ Acta Universitatis Lundensis,” 1866) ; and 
Steat_ many non-arctic plants which ‘have spread as ‘far as ‘North 
00 the other hand, there are many plants growing in Europe . 
have probably migrated hither from ‘North America by Asia. 
Species now a odteiintetion is, known to be over the st 
North of Europe and Asia, even as far as to Mandschuria and Japan. 
Thus no obstacle of that sort to the view'of its migratiow from’ North 
America seems to arise. A en Nee ee 
I 
