10 Canadian Record of Science. 
Acer Pennsylvanicum. L. Fraxinus sambucifolia, Lam. 
Acer saccharinum, Wang. Quercus rubra, L. 
A. rubrum, L. Q. alba, L. 
Waldsteinia fragrarioides, Tratt. Fagus ferruginea, Ait. 
Dalibarda repens, L. Betula lutea, Mx. 
Rubus villosus, Ait. Pinus strobus, L. 
Aralia racemosa, L. P. resinosa, Ait. 
Viburnum lantanoides, Mx. Abies Canadensis, Mx. 
Cephalanthus occidentalis, L. Ariszema triphyllum, Torr. 
BorEAL GROUP. 
The localities and their surroundings where the species 
of this group are found, sufficiently account for their pre- 
sence now there. In regard to some which occur around 
the Lake Superior coasts, we can attribute their first migra- 
tion thither to the same succession of circumstances which 
gave rise to the small colony of sub-arctic plants more or 
less associated with them there, and to which allusion will 
be made when referring to the sub-arctic group. 
Illustrations of this group are :— 
Anemone parviflora, Mx. . Tanacetum Huronense, Nutt. 
Sagina nodosa, Mey. Artemisia borealis, Pallas. 
Oxytropis campestris, D. C. Arnica Chamissonis, Less. 
Hedysarum boreale, Nutt. Lobelia Dortmanna, L. 
Parnassia palustris, L. Pinguicula vulgaris, L. 
Cornus suecica, L. Rhinanthus Crista-galli, L. 
Viburnum pauciflorum, Py. Polygonum viviparum, L. 
Aster graminifolius, Psh. Pinus Banksiana, L. 
ONTARIO GROUP. 
The species referable to this group, and some of which 
are confined to Ontario, have, in general, in the United 
States, a range from Western New England to Wisconsin— 
a stretch of country in breadth about similar to that of 
Ontario. They occur chiefly west of the Appalachian chain, 
and do not appear to cross from the forest lands of Wis- 
consin into the prairie country of Minnesota and Dakota. 
Their northward and northeastward range in Canada is 
probably limited by the colder climate. 
