802 Wisconsin Academy of Sciences, Arts, and Letters . 
changes and segregations have been made of late, such as Carex, 
Panicum, and others, more recent treatment has been observed. 
To indicate the degree of frequency as nearly as possible, 
four adjectives are used; common, frequent, occasional, and 
rare. 
With one or two exceptions, we have followed the practice of 
including in this list only such numbers as are supported by 
herbarium specimens. All are in the writer’s herbarium ex¬ 
cept where otherwise noted. This strict rule excludes from 
the list many species, now disappeared, which were noted by 
Drs. Hoy and Davis years ago hut of which no specimens we:co 
preserved. 
Grateful acknowledgment is due Prof. M. L. Pernald of the 
Gray Herbarium of Harvard University, who determined 
doubtful Carices and rendered helpful assistance in other 
groups. Most of all am I indebted to Dr. J. J. Davis of Pa* 
cine, Wis., who extended me at all times free access to his 
herbarium, and freely gave me the benefit of his knowledge of 
the local flora gained from a score of years acquaintanceship 
with it. Without his generous assistance this list would have 
been much more meagre in numbers than it is. 
The western and southern parts of the counties have been 
covered only very superficially, and further search there should 
yield quite a few additional numbers. 
Delavan, Wisconsin, December, 1907. 
