STEPS IN THE HISTORY OF THE EVOLUTION OF PLANTS 
PLANT CLASSIFICATION monocotyledon s 
DICOTYLEDONS 
CO 
111 
Of 
3 
< 
_J 
b 
z 
UJ 
2 
o 
z 
CO § 
p 
UJ ® 
<5 
CO 
I 
00 
ID 
O 
Ci 
cB 
co 
z 
o 
o 
UJ 
3 £ 
uj g 
Mg 
<o z 
P o 
P z 
UJ 
OS 
05 © 
00 
> z 
I— UJ 
h- Q 
CO UJ 
UJ 
0 
r 
1 
0) 
£ 
H 
P 
b 
00 
< 
b w 
s* 
co z 
§£ 
UJ u. 
o ° 
IMPLYING EVOLUTION f I - STRUCTURE (MORPHOLOGY 
EVIDENCES •< 2~ DEVELOPMENT (ONTOGENY) 
(3- FOSSILS (PALEONTOLOGY) 
