forest which will eventually procode the mesophytic 
forest as the latter claims the entire valley. The typical 
tree species are arbor vitae, white spruce, balsam, tamar- 
aoli and black ash. The forest floor is rough and often 
covered with a mass of shrubs, fallen logs and herbaceous 
growtli. The soil is typical muck, having a fine texture. 
In July the water table was approximately 3 dm. below the 
surface. Characteristic herbaceous plants are Aral!a 
nud i oaul i n . as tor naorophyllus . Galium asprollum Ilichx., 
Aspiflium crista tun (L.) Sw., Clintonia borealis fiJLt.) Raf •, 
Clrcaou alpinu L., Carox loptaloa .ahlerib., and Habenaria 
hyperboreu fL.) Rydb. 
The hydraroh successions of the river a nX flood plain 
contain many of the eloments of typical peat bog areas 
suoh us described by Davis flOa) for the Upper Peninsula. 
On the other hand, there is a lack of definitoness in the 
sequenoo of the associations; and the sphagnum element, 
with its accompanying vegetation, is not at all common. 
The latter condition is duo to the influx of fresh water 
during at least a portion of the year. A year of unusually 
high flood may destroy the continuity of vegetational 
development along cortain linos. This is well attested 
near the intake of Carp Lake by the dead und dying trunks 
of small black ash treos. Periods of exoessivo flooding 
