The Vegetation of the Inland Sand Deposits of Illinois
The Vegetation of the Inland Sand Deposits of Illinois
Gleason, Henry A. (Henry Allan), 1882-1975
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Rhus glabra is occasional and a single individual of Pyrus americana was found in the Winnebago area. Digitized by Google 126 One of the most noteworthy plants is a species of Geaster, which is abundant in each of the five areas, especially in open woods or near the edge of the forest. Although the total number of species in the association is large, the number per unit of area is scarcely greater than in the prairie. Counts of a series of quadrats each two meters square, in the Win- nebago are...a, showed an average of 6.5 species per quadrat. The forest there was rather open, with a thin deposit of mold, and the conditions for plant life near the optimum. In the whole field of about twenty acres (8 hectares) 32 species occurred. The number of species in the whole association is large, as might be expected in a type of such wide distribution and extent, but less than hdf of the total live in any one of the five areas examined. The small number in any individual station and the large number for each quadrat pro- duce a monotonous uniformity throughout the association and pre- vent the recognition of definite consocies.
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