Structure of Acer Pseudoplatanus. 
593 
Figs. 68-71. Diagrams illustrating the three types of transition from the cotyledons to 
the hypocotyl described in the text. 
ACER ABROHIA CALYCAHTHUS 
Figs, 72-4. Comparative diagrams illustrating the transition features in Acer , Abionia and 
Calycanthiis. 
R r 2 
