A FOREST CENSUS IN LYON COUNTY 



409 



all of them probably having been planted by the same squirrel. 

 It is rather remarkable that these trees should be found in this 

 part of the wood only, and none lower down, especially on the 

 river bottom. 



Figure XXI of Plate XIV shows the entire forest. It will 

 be noticed that the river bottom is thinly forested, that most of 

 the trees on it are found close to the river, and that large tracts 

 are devoid of arboreal vegetation. The face of the bluff is densely 

 covered from its foot to the upper tree limit, excepting small 

 openings here and there, usually not more than two or three rods 

 in diameter. Looking at the chart the forest appears very uni- 

 form, and it is only when one goes out into the field that the great 

 difference due to the different species of trees, and to the different 

 conditions of growth becomes apparent, the lower forest (Plate 

 XV, figure A) , being very dense and heavy, and the upper forest 

 lower and less dense, as will be seen in the accompanying photo- 

 graphs (Plate XV, figures B and C). The effect of environment 

 in selecting the forest trees of a locality clearly appears in this 

 tract. Figure 47 is a sketch of the bluff, giving elevations and 



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aX*v& a*"** 



Stt^» 



SWL^ 





frCJt^Z -^ « fUt X« A^M. ■&**£ 

 '■ • ■■ IH -. S 4 





Fig. 47. 



distances. The observations on the herbaceous plants, on evapor- 

 ation, transpiration, and meteorological conditions made at this 

 point during three years will appear in another paper. 



Department of Botany, 

 State University. 



