THE BRYOLOGIST 
Vol. XXV May, 1922 No. 3 
THE BRYOPHYTES OF MICHIGAN 
WITH P/RTIGULAR REFERENCE TO THE DOUGLAS LAKE REGION* 
George E. Nichols 
Our knowledge of the bryophyte flora of Michigan seems to be limited to 
five published lists, of which three are based on collections from Isle Royale, 
the extreme northern. outpost of the state. Of these three, the first in order, by 
Holt\ records 38 mosses; the second, by Cooper'^, raises the number of mosses to 
104; the third, by Conklin^, records 36 liverworts. Of the two remaining papers 
one by KaufTman^, based in large measure on specimens collected in southern 
Michigan, records a total of 131 liverworts and mosses; the other by Praeger^ 
records 10 species of Sphagnum from the vicinity of Douglas Lake. 
The present paper, like Praeger's, is the outcome of investigations carried 
on at the University of Michigan Biological Station, situated on Douglas Lake, 
and is based primarily on collections made by the writer during the summers of 
1920 and 192 1. By far that larger number of records are from the immediate 
vicinity of Douglas and Burt Lakes, in Cheboygan County, but collections were 
also made in the vicinity of Pellston, Cecil Bay, and Big Stone Bay, in Emmet 
County, and on Mackinac Island, in Mackinac County. Cheboygan and Emmet 
Counties are the northernmost counties in the southern peninsula of Michigan, 
while Mackinac Island lies in the straits of Mackinac, between Lakes Michigan 
and Huron. A few scattered records are included from the southern shores of 
the northern peninsula of Michigan (Prentis Bay and Scotty Bay), based on col- 
lections by Dr. J. H. Ehlers, who is responsible also for a number of records from 
other localities. 
* Contribution from the Osborn Botanical Laboratory. 
^ Hclt, W. P. Notes on the vegetation of Isle Royale, Michigan. In "An ccolDgical survey 
of Isle Royale, Lake Superior", prepared under the direction of C. C. Adams. Lansing. 1908 
(i9oy). 
'^Cooper, W. S. A list of mosses collected upon Isle Royale, Lake Superior. Bryologist 16: 
1-8. 1913. 
Conklin, G. H. Alistof Hepaticae collected upon Isle Royale, Lake Supenor. Bryologist 
17: 46-48, 52-55- 1914- 
^ Kaufifman, C. H. A preliminary list of the bryophytes of Michigan. Mich. Acad. Sci. 
Rep. 17: 217-223. 1915. 
^ Praeger, W. E. A coHec:ion of sphagnum from the Douglas Lake region, Cheboygan 
County, Michigan. Mich. Acad. Sci. Rep. 21: 237, 238. 1919. 
The March number of The Bryologist was published May 22, 1922, 
