os] TRANSEAU—BOGS OF THE HURON RIVER VALLEY 441 
Equisetum limosum, Cornus candidissima, Aronia nigra, Rosa 
Carolina, Juncus effusus, Calamagrostis canadensis, Rubus strigosus, 
licioides mucronata, Comarum palustre, Carex filiformis, Panicu- 
lia canadensis, and Poa flava. Forming a high border about the 
lamaracks and spruces are numerous large plants of Vaccinium 
corymbosum and Ilicioides mucronata. . 
The very marked difference between the vegetation of the central 
and marginal parts of the bog are worthy of especial note. The 
lormer represents the original vegetation of the bog. The latter 
illustrates most forcibly that under present conditions a very different 
“et of plants springs up and becomes dominant, in spite of the fact 
that the true bog plants were near at hand when the clearing 
‘curred. This bog also illustrates that stage in the filling of a 
depression immediately following the disappearance of the lake. 
In other bogs near Oxford, Dasyphora fruticosa and Chiogenes 
tispidula occur among the shrubby growth. 
THE DELHI MUSKEAGS. 
In the bog north of Delhi which has already been described 
‘cur two areas, somewhat to the west of the lakes, which seem to 
‘present a later stage in the history of a bog than that shown by the 
es. These areas, if they were found in northern Michigan, would 
be termed ‘“‘muskeags.” They are surrounded by large tamaracks, 
and small tamaracks occur throughout, the smallest specimens toward 
the center. Tf the bog at Oxford were to continue its work of filling 
Until the central society disappeared, we should have a bog area of 
much the same appearance. The small tamaracks stand far apart, 
and between them is a most luxuriant growth of cassandra and 
‘Phagnum. The hummocks rise between 3 and 4 feet (0.9-1.2") 
above the substratum. As one attempts to. traverse these areas, he 
‘ks knee-deep in the lon fibrous, peat moss. : 
The total i iiber of ee is very small, and includes, besides 
those already mentioned, Andromeda polifolia, Sarracenla purpurea, 
paveoecus macrocarpus, and a few specimens of Vaccinium corym- 
um. 
BOG ON CARPENTER ROAD ie 
b This bog is situated in the SW. % Sec. 39; Amn Arbor P- ee 
‘sin is a small depression in the glacial moraine occupying 4 
