PLATE XVIII. 



Pago. 



Figs. 1-5. Betola Stevensoni, 6r. 2 139 



Figs. 6-8. Axnus Kefersteinii, Gr. 2,3,4 6 140 



Figs. 9-11. Corylus Mac Qdarrii, Gr. 2 144 



10 a. Border of leaf, magnified. 



