INVESTIGATIONS ON THE PHYTOGENY OF THE ANGIOSPERMS 5 
Table II 
Species 
Palm. Simple 
Palm. Lobed 
Pinnate 
Compound 
Cretaceous 
Potomac 
22 
6 
7 
6 
3 
S. Carol, and Georgia. 
68 
II 
3 
46 
8 
163 
24 
42 
95 
2 
Territories 
79 
19 
20 
39 
114 
12 
14 
75 
13 
Amboy Clays 
106 
15 
16 
67 
8 
S. N. Y. and N. Eng. . 
159 
22 
22 
107 
8 
Arctic 
32 
3 
I 
20 
8 
Patoot 
71 
14 
8 
37 
12 
94 
15 
8 
47 
24 
Total 
908 
14.I (is.s%) 
141 (is.s%) 
OOy \Oy /VJ 
87 (10%) 
Tertiary 
205 
57 
12 
109 
27 
130 
40 
g 
68 
g 
34 
84 
12 
6 
10 
6 
24 
3 
48 
9 
178 
31 
II 
106 
30 
46 
13 
4 
24. 
5 
50 
17 
5 
26 
2 
70 
19 
3 
40 
8 
Austria 
31 
3 
4 
18 
6 
Japan 
49 
7 
5 
30 
7 
Total 
877 
229 (26%) 
61 (7%) 
479 (55%) 
106 (12%) 
Total of fossil floras 
1,785 
370 (21%) 
202 (11%) 
1,018 (57%) 
195 (11%) 
Total woody plants in 
modern floras studied 
7,014 
661 (9%) 
305 (4%) 
4,578 (65%) 
1,470 (21%) 
little commoner than at present, but the palmate simple was much 
more abundant. Of course other fossil floras which are yet to be 
worked out, particularly those which are distinctly from tropical 
regions (where palmate forms are generally less numerous) may some- 
. times show conditions different from those which we have presented 
here; and fossil evidence in the present problem cannot be regarded 
as at all conclusive. The facts available at present, however, certainly 
seem to indicate that palmate leaves, particularly lobed ones, were 
much more abundant in earlier geologic time than at present. 
Morphological Evidence 
I. The Important evidence toward a solution of the present 
problem may be obtained from a study of the general topography of 
the node. One of the writers^ has shown that among Dicotyledons 
5 The Anatomy of the Node as an Aid in the Classification of Angiosperms. 
Sinnott, E. W., Am. Jour. Botany, i: 303-322. 1914. 
