XX111 
PERCENTAGE COMPARISON OF DIVISIONS. 
The following table shows the relation of our flora to the floras specified: 
Cook and Lake 
Counties. 
Illinois. 
Northeastern 
United States. 
Southeastern 
United States. 
Eastern 
United States. 
Fortieth Parallel 
Survey. 
Wheeler’s 
Survey. 
Polypetalae 
30.1 
28.5 
26.8 
28.9 
27.6 
35.1 
31.9 
Ga/mopetalaft 
32.6 
32.2 
31.6 
34.7 
32.6 
36.0 
35.8 
Total Dichlamydeae. 
62.7 
60.7 
58.4 
63.6 
8.8 
60.2 
71.1 
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Monochlamydeas (Apetalae) . .... 
9.3 
9.8 
7.9 
8.7 
9.8 
Total Dicotyledons 
72. 
70.5 
66.3 
72.4 
24.3 
68.9 
80.9 
78.3 
Monocotyledons 
25.2 
25.5 
29. 
25.6 
16.4 
15.7 
Gymnosperms 
0.5 
0.7 
0.9 
0.7 
0.7 
1.2 
1.3 
Total Phaenogamia 
97.7 
96.7 
96.2 
97.4 
95.2 
98.5 
95.3 
Crvptogamia 
2.3 
3.3 
3.8 
2.6 
4.8 
1.5 
4.7 
Totals 
100.0 
100.0 
100.0 
100.0 
100.0 
100.0 
100.0 
PERCENTAGE COMPARISON OF LARGER FAMILIES. 
1 Lake 
Counties, 
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Compositae 
14.3 
13. 
12.2 
13.7 
12.3 
16.5 
16.6 
Cyperaceae - 
8.7 
8.5 
10.5 
8. 
8.9 
4.4 
3.8 
Gramineae 
6.8 
7.8 
7.5 
7.2 
7.4 
5.4 
7.8 
Leguminoseae 
4.2 
4.7 
4.3 
6.1 
5.2 
7.2 
8.2 
Rosaceae 
3,7 
2.9 
3.2 
3. 
2.2 
2.6 
3.4 
2.9 
Ranunculaceae 
2.7 
2.3 
1.9 
2. 
3. 
2.3 
Scrophulariaceae 
2.7 
2.7 
2.3 
2.5 
2.4 
4.5 
4.8 
Labiatae 
2.6 
2.8 
2.2 
2.8* 
3. 
0.9 
2.2 
Cruciferae 
2.6 
2.1 
2. 
1.4 
1.9 
4.4 
2.8 
Liliaceac 
2.2 
2.1 
2.4 
2.1 
2. 
3. 
1.5 
Orchid aceae 
2.2 
1.8 
2.4 
1.9 
1.7 
0.6 
0.5 
Umbelliferae 
2. 
1.8 
1.7 
1.6 
1.6 
2.4 
1.2 
Polygonaceae 
2. 
1.8 
1.1 
1.5 
1.5 
4. 
3.2 
