SECTION IV. 1883. (SANT Trans. Roy. Soc. CANADA. 
VII.—Notes on Canadian Polypetale. 
By Joun Macoun, A.M., F.LS. 
(Read May 22, 1883.) 
During the past winter I have been making a particular study of the Canadian Poly- 
petalæ as regards distribution and synonymy, and purpose in the following notes to record 
afew of the results. Owing to the prominence of the greater number of the species of this 
section, they have been to a large extent detected and identified, and hence we can consider 
that less has yet to be done in this direction than in any other. 
The following orders, genera, and species have been found within our limits, which 
are made to include Alaska and Newfoundland as well as every part of the Dominion. They 
are tabulated and arranged to show the botanical districts into which, for the sake of 
comparison, I have divided the whole area. The districts are :— 
I. British Columbia and Alaska northward to the Arctic circle. 
II. Rocky Mountains from latitude 49° to the Arctic circle. 
IT. The region lying east of the Rocky Mountains and extending to the Red River 
Valley, and including the whole country north to the Arctic circle between James Bay and 
the Rocky Mountains. 
IV. From Red River Valley, or the edge ot the forest eastward to Rivière du Loup in 
Quebec. This area includes all Ontario and much of Quebec. 
V. Includes: the Atlantic provinces and the eastern part of Quebec, with Labrador 
and Newfoundland. 
VI. All the country north of the Arctic circle. 
An analysis of the table (page 152) will show that British Columbia, although least 
known, has nearly as many species as Ontario and Quebec, but that no less than fifteen 
of the forty-seven orders are absent. These orders, representing one third of the whole 
number, contain twenty-three genera, and twenty-eight species. The Ontario and Quebec 
flora, on the other hand, includes forty-five orders, and the two which are absent contain 
only two genera and four species. The orders wanting in British Columbia are :— 
Magnoliacee. Ilicinaceæ. 
Anonacaæ. Vitaceæ. 
Menispermaceæ. Hamamelaceæ. 
Sarraceniaceæ. Melastomaceæ. 
Cistaceæ. Lythraceæ. 
Elatinaceæ. Cucurbitaceæ. 
Tiliaceæ. Ficoideæ. 
Rutacee. 
The orders wanting in the Ontario and Quebec flora are :— 
Elatinacee. |  Loasaceæ. 
