33 6 
The Ohio Naturalist. 
[Vol. VIII, No. 6, 
structure only begins to show, but at the fruiting season of the 
wild rice the habitat of the Castalia-Nymphaea formation is 
conspicuously dominated by the Society. 
The Phragmites-Typha Marsh Formation. 
In the more sheltered habitat afforded around the cove this 
formation differs from the formation as found in the marsh to 
the west of the Bar Section in that the Typha latifolia Consocies 
is more prominent. It appears from the writer’s observations 
that the Typha latifolia Consocies prefers a soil rich in humus 
while the Phragmites phragmites Consocies, other conditions being 
Fig. 20. The Utricularia vulgaris Society in one of the larger inlets 
running into the marsh at the north end of Biemiller’s Cove. Typha 
latifolia and Typha angustifolia Consocies in the background. Scirpus 
americana at the right. * 
equal, prefers a more sandy substratum. On the submerged 
sand bar which forms the southern boundary of Biemiller’s Cove 
the axis of the bar where about a foot under water is occupied by 
the Phragmites phragmites Consocies, while towards the junction 
of the bar with the mainland, where there is considerable humus 
in the soil, the Typha latifolia Consocies appears. 
The composition of the formation as exemplified around the 
coves is as follows: 
