Ecology of the Cincinnati Region 
197 
around which are always found plants characteristic of undrained swamps 
(Cowles, 1901 ). Fig. 52 shows one of the sloughs of the Miami, in which 
the channel is full of quiet water. It is bordered by willows (Salix nigra, 
and .S', cordata ).. 
Fig. 52. A slough of the Miami bordered by willows. 
This marginal zone of bushy willows is a continuation of the first 
tree zone of the rivers. It completely surrounds the “island’’ which is 
enclosed between the slough and the river. Commencing with this zone 
of willows, the slough succession and the river bank succession are 
identical. 
