34 
IOWA ACADEMY OP SCIENCE 
Peecentage of Teees, Nishnabotna Valley, Neae Hambueg, Iowa- 
Missouei Line. 
Name of Species 
5 
Ostrya virginiana. . . 
Oarya ovata 
Carya ovalis 
Carya cordiformis . . 
Crataegus mollis . . . 
Ulmus americana. . . 
Ulmus fulva 
Platanus occident- 
alis 
Juglans nigra 
Morus rubra 
Tilia americana 
Quercus acuminata . 
Quercus rubra 
Quercus macrocarpa 
Fraxinus pennsyl- 
vanica var. lanceo- 
lata 
Fraxinus americana. 
Asimina triloba. . . . 
Gymnocladus dioica. 
Gleditsia triacan- 
tiios 
Cornus paniculata . . 
Cercis canadensis . . . 
Celtis occidentalis . . 
Acer saccbarinum 
Acer Negundo 
Salix missouriensis. 
Salix cordata 
Salix nigra 
Salix amygdaloides . . 
Populus deltoides 
21.7 
20.99 
13.76 
0 
1.55 
0 
3.50 
0 
5.42 
1.55 
10.30 
0 
6.42 
3.82 
0 
0 
9.52 
2.32 
3.44 
3.9 
1 . 
1.55 
13.70 
7.7 
4.65 
.775 
3.50 
8.5 
0 
0 
0 
20.2 
3.10 
3.87 
0 
0 
2.22 
2.22 
3.40 
0 
^ 5.13 
2.32 
17.20 
0 
4.10 
3.10 
3.50 
0 
3.10 
5.42 
3.44 
0 
0 
1.55 
0 
1.3 
1.10 
0 
0 
19.5 
5.50 
1.55 
6.88 
0 
9.65 
43.32 
0 
0 
3.77 
.775 
0 
0 
1.55 
.755 
3.44 
7.8 
0 
• 0 
3.55 
0 
2.55 
1.55 
0 
0 
8.97 
2.55 
3.55 
0 
0 
0 
0 
2.3 
0 
0 
0 
1.3 
0 
0 
i ^ 
15.6 
0 
0 
0 
5.1 
0 
0 
I 0 
1.3 
0 
0 
1 ^ 
2.3 
0 
0 
0 
3.2 
On areas 1 to 14, included under . plot I, northeast slope, 
Missouri loess, Marshall silt loam, from top of hill to bottom, 
the Asimina formed a thicket near the lower portion of the 
slope on the bank. Here too the Carya ovalis was abundant. 
In the narrow bottom Fraxinus pennsylvanica var. lanceolata, 
Juglans nigra and Gleditsia triacanthos occurred. In areas 23-29 
included under plot II, north slope, down to Nishnabotna bot- 
