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in depth and there are several small streams which flow through the 
wooded portion, in which there are also many small pools in depres- 
sions of greater or less size. These afford good habitats for a num- 
ber of mollusks. 
The flora of this region comprises a number of distinct plant 
societies which may be classed as follows. 
(1). That of the central nucleus, the pond, which provides a 
habitat for 
Typha latifolia. Cattail. 
Iris versicolor. Large Blue Flag. 
Asclepias incarnata. Swamp Milkweed. 
(2). That at the edge of the pond, which is marked by the 
presence of 
Salix longifolia. River-bank Willow. 
Ulmus americana. American Elm. 
Quercus bicolor. Swamp White Oak. 
This plant society is closely encroaching upon the first society, 
and will ultimately exterminate it by invading the entire area. 
(3). The large forest-trees form a distinct society which follows 
closely upon the society mentioned above. The trees are of large 
size, showing that the area has been untouched by man. The fol- 
lowing species comprise the dominant types: 
Ulmus americana. American Elm. 
Tilia americana. Basswood. 
Crategus punctata. Large-fruited Thorn. 
Crategus mollis. Red-fruited Thorn. 
Corylus americana. Hazelnut. 
Quercus bicolor. Swamp White Oak. 
Carya ovata. Shellbark Hickory. 
(4). The ground beneath the forest growth is carpeted with low- 
growing plants, among which the following species are conspicuous: 
Arisema dracontium. Green Dragon. 
Campanula americana. Tall Bellflower. 
Cicuta maculata. Water Hemlock. 
Osmorrhiza longistylis. Smoother Sweet-Cicely. 
Rudbeckia laciniata. . Green-headed Coneflower. 
The entire area is an excellent example of plant succession. 
The poison ivy or poison oak (Rhus radicans) grows luxuriantly 
on the western edge of this area. 
(2) 
