32 Nebraska Experiment Station Research Bulletin 19 
Table 12. — Histological Leaf Measurements of Native Corn 
Types Graicn in Various Regions of Nebraska. 1915. 
Where grown 
Thickness of 
Per cent of total leaf 
thickness of 
Number 
vascular 
bundles 
per cm. 
leaf width 
Leaf 
Upper 
epi- 
dermis 
Lower 
epi- 
dermis 
Upper 
epi- 
dermis 
Lower 
epi- 
dermis 
Total 
epi- 
dermis 
County 
(1) 
Microns 
(2) 
Microns 
(3) 
Microns 
(4) 
Per cent 
(5) 
Per cent 
(6) 
Per cent 
(7) 
(8) 
EASTERN NEBRASKA 
Richardson .... 
230.3 
34.9 
29.6 
15.2 
12.8 
28.0 
63.8 
Lancaster 
217.6 
33.8 
27.0 
15.5 
12.4 
27.9 
68.0 
Thurston 
229.8 
35.4 
28.1 
15.4 
12.2 
27.6 
66.2 
Average . 
225.9 
34.7 
28.2 
15.3 
12.4 
27.8 
66.0 
CENTRAL NEBRASKA 
Lincoln 
236.6 
34.3 
28.4 14.5 
12.0 
26.5 
59.7 
Cherry 
232.4 
35.4 
29.6 ! 15.3 
12.7 
28.0 
63.9 
Average 
234.5 
34.8 
29.0 i 14.9 
12.3 
27.2 
61.8 
WESTERN NEBRASKA 
Dawes 
Kimball 
234.7 
221.2 
35.4 
33.8 
28.7 
28.7 
15.1 
15.3 
12.2 
13.0 
27.3 
28.3 
62.7 
66.6 
Average .... 
227.9 
34.6 
28.7 
15.2 
12.6 
27.8 
64.6 
Where 
grown 
Number of 
stomata per 
sq. m. m. 
Length 
of stoma 
Length of 
epidermal cell 
Width of 
epidermal cell 
Upper 
Lower 
Upper 
Lower 
Upper 
Lower 
Upper 
Lower 
epi- 
epi- 
epi- 
epi- 
epi- 
epi- 
epi- 
epi- 
dermis 
dermis 
dermis 
dermis 
dermis 
dermis 
dermis 
dermis 
County 
(1) 
(9) 
(10) 
Microns 
(ID 
Microns 
(12) 
Microns 
(13) 
Microns 
(14) 
Microns 
(15) 
Microns 
(16) 
Richardson . 
69.9 
86.2 
EASTERN NEBRi 
49.2 I 47.5 
A.SKA 
96.7 
87.3 
35.7 
37.4 
Lancaster . . 
68.5 
84.0 
50.6 
1 48.7 
107.4 
97.7 
35.5 
35.1 
Thurston . . . 
60.0 
79.0 
50.7 
49.2 
100.7 
97.2 
35.5 
36.3 
Average ... 
66.1 
83.0 
50.2 
48.4 
101.6 
94.1 
35.6 
| 36.3 
Lincoln .... 
73.2 
95.9 
CENTRi 
50.1 
\L NEBRASKA 
48.3 83.9 
71.4 ' 
36.1 1 
35.5 
Cherry 
75.2 
91.7 
47.1 
45.4 
84.3 
85.4 
35.6 
33.3 
Average .... 
74.2 
93.8 
48.6 
46.8 
84.1 
78.4 
35.8 ! 
34.4 
Dawes 
74.3 
89.4 
WESTERN NEBRASKA 
44.0 ■ 45.9 84.6 
79.8 
36.4 ! 
35.9 
Kimball .... 
79.0 
99.0 
43.6 
43.0 
89.2 ; 
85.0 
35.2 
34.4 
Average . . . . 
76.6 
94.2 
43.8 
44.4 
86.9 
82.4 
35.8 
35.1 
