56 



STRICT-PINNATE VENATION 



[CH. 



Hawthorn 

 Cherry Laurel 



Oaks 

 Rhododendron 



Portugal Laurel 

 Azalea. 



Fig. 16. Leaf of Chestnut, Castanea vesca, showing strict-pinnate 

 venation. The tertiaries break up rapidly into the reticulation (Ett). 



The following afford examples of strict-pinnate vena- 

 tion : 



Horse-chestnut Chestnut Hazel 



Hornbeam Elms White Beam 



Alder Birch Beech. 



