VI. The Leaf. 



(With special reference to evolution.) 



(Continued from Parts LVI and LVII, and the Plates of Part LX). 



PAGE. 



1. Introduction 203 



2. Hand-crushing of leaves for determination of species 204 

 3 Angles of secondary veins with midrib .... 204 



4. Juvenile leaves (note only) 205 



5. Mature leaves (note only) 205 



6. Correlation of Seedlings and Juvenile Leaves (ad- 



ventitious shoots) 206 



a. Terminology of Juvenile Leaves .... 208 



b. Coloured Plates 208 



Juvenile Leaves. 



7. Additional descriptions 209 



Explanation of Plates (264-267) 231 



