A CONTRIBUTION TO THE FLORA OF THE LAKE 
SUPERIOR REGION. 
BY L. S. CHENEY. 
During the summer of 1891, through the kindness of Mr. 
F. F. Wood, I had the pleasure of doing some collecting at 
various points in northern Wisconsin, along the north shore of 
Lake Superior, and along the boundary between Minnesota and 
Ontario,—the last a region comparatively little known, botan- 
ically. It is with the permission of Mr. Wood that I make use 
of the material obtained at that time, in this brief paper. 
Excluding the small portion in Wisconsin, the region under 
consideration is a heavily timbered one, made up in greater 
part of a series of parallel ridges running east and west, and 
separated by deep narrow lakes, or tamarack or cedar swamps. 
Geologically, the rocks of the region belong to the Algonkian 
age. Along the course of the Pigeon river and boundary to 
Gunflint Lake, the Huronian appears. Between Gunflint Lake 
and Lake Seiganagah the Archaean breaks through, giving the 
name Granite River to the short stream connecting the two 
bodies of water. 
From Lake Seiganagah west to Tower, the Huronian is again 
the surface formation. To the southwest of Gunflint Lake, the 
Archaean again appears as a long narrow ridge running away a 
hundred or more miles to the southwest. This ridge is known 
as the Mesabe range. Adjoining this range on the south is 
another narrow strip of Huronian. Over the remainder of the 
region, the Keweenawan forms the surface formation. 
Collecting was done at Fond du Lac, on the St. Louis river; 
along the lake shore from Grand Marais to Grand Portage; along 
the old Dawson Canoe route (a line almost identical with the 
