CLIMATIC DISTRIBUTION OF CERTAIN ANGIOSPERM LEAVES 27 
Table I — Group 4 
Total 
Species 
'/o 
Trees 
4 
Shrubs 
Herbs 
Entire 
Trees 
Entire 
Shrubs 
i 
Entire 
Herbs 
Florida Keys 
473 
8 
37 
55 
84 
83 
64 
Nicaragua 
17 
39 
44 
86 
71 
48 
2,209 
19 
52 
29 
88 
71 
61 
10,468 
21 
62 
17 
87 
76 
56 
Hongkong 
699 
16 
43 
41 
73 
71 
58 
Flora Orientalis 
9.771 
4 
13 
83 
71 
72 
53 
Upper Gangetic Plain 
1,084 
15 
31 
54 
73 
71 
45 
Malay States 
3.252 
41 
42 
17 
90 
82 
64 
1.752 
20 
44 
36 
84 
78 
54 
333 
30 
38 
32 
83 
80 
67 
East Indies 
6,389 
30 
45 
25 
81 
75 
49 
521 
26 
50 
24 
78 
61 
45 
^^.734 
45 
33 
81 
82 
6<i 
W. Australia 
2,543 
2 
73 
25 
73 
83 
71 
New South Wales 
1,780 
13 
54 
33 
75 
84 
54 
1,152 
6 
50 
44 
87 
84 
52 
Tasmania. 
662 
4 
48 
48 
82 
77 
45 
Egypt 
1,239 
2 
16 
82 
73 
78 
49 
C. E. Africa 
2,837 
6 
36 
58 
75 
74 
54 
C. W. Africa 
2,656 
17 
46 
37 
85 
80 
56 
S. W. Africa 
2,400 
II 
43 
46 
84 
82 
62 
S. E. Africa 
2,653 
8 
42 
50 
80 
78 
56 
7,783 
2 
55 
43 
73 
74 
53 
Mauritius-Seychelles 
545 
17 
49 
34 
88 
84 
65 
66,444 
81 
77 
56 
form-variations of little functional significance that are held on by 
heredity? 
In the first place, the possibility suggests itself that the entire- 
leaved plants in temperate regions and the non-entire-leaved forms 
in tropical regions may occur in somewhat different environments from 
those occupied by the prevailing types of arborescent vegetation. A 
detailed examination of the regions and percentages given in Table I 
affords some evidence that seems to point in this direction. All the 
regions recorded are heterogeneous in that they contain in most cases 
more than one of even the principal plant formations. In group 2, 
those regions, Rocky Mountains, south Russia, France, Siberia, etc., 
which have larger areas of arid or physiologically dry environments, 
have higher percentages of entire-leaved shrubs. On the other hand, 
those regions of the tropics that have more extensive equable environ- 
ments or moist cool uplands have higher percentages of herbs with 
non-entire leaves and leaflets. 
The influence of uplands, in increasing the number of non-entire 
