MICHIGAN ACADEMY OF SCIENCE. 
147 
SOME INTERESTING PLANTS FROM THE VICINITY OF 
DOUGLAS LAKE. 
BY HENRY ALLEN GLEASON. 
During the first two years of botanical work at the Biological Sta- 
tion of the University of Michigan, located at Douglas Lake in Che- 
boygan County, 294 species of flowering plants and ferns were listed. 
I luring the third season, Dr. Frank C. Gates, in the employ of the 
State Biological Survey, conducted an ecological survey of the Douglas 
Lake region, and increased the list to 408 species. This number in- 
cludes not only those seen personally by Dr. Gates, but also others 
collected by members of the Station during the same year or previously. 
During 1912, the fourth season of the Biological Station, a more thorough 
study of the flora was made by Miss Maud Robertson, who collected 
specimens of approximately 560 species of flowering plants and ferns, 
of which 166 species had not previously been reported from the vicinity 
of the Station. The continued thoroughness and industry with which 
Miss Robertson prosecuted this work is worthy of special mention. 
About 70 species reported in Dr. Gates’ list were not found by Miss 
Robertson, so that the reported flora of the Biological Station includes 
at the present time 634 species. The official flora, however, includes 
only those species which are represented by specimens in the Station 
herbarium, approximately 560 in number. The term approximately is 
used because the study of the grasses and sedges is not yet completed, 
and because of a few doubtful species mentioned below. 
Among these 560 species are several which are of sufficient interest 
to deserve mention here. These will be grouped in four classes. 
A. Species whose occurrence at Douglas Lake marks a conspicuous 
addition to their known distribution, as reported in Beal's Michigan 
Flora. 
1. Botrj/chhnn simplex E. Hitchcock. The only station hitherto re- 
ported from the Lower Peninsula is at Oscoda. 
2. Viola Rafinesquii Greene. This violet is usually considered es- 
sentially southern in its distribution. It is reported by Beal from Cros- 
well and Detroit, in the southeastern part of the state, and by Gates 
from the extreme southwestern portion. 
3. Fraxinus pennsylvanica Marsh. Although reported from Black 
Lake in Beal’s Michigan Flora, the red ash is rightly regarded as charac- 
teristic of the southern part of the Lower Peninsula. Authentic fruit- 
ing specimens were collected by Miss Robertson from a tree at the ex- 
treme north end of Burt Lake. 
4. Sci'oplmlaria leporella Bicknell. The plant grows thriftily in 
the wet, frequently burned woods along Maple river, near its source in 
Douglas Lake, and reaches a height of eight feet. 
5. Hieracium paniculatum L. The species is credited by Beal to 
the central and southern portions of the Lower Peninsula. It is fairly 
