PLATE XXII. 



Vage. 



Figs. 1, 2. Salix Integra, 6r. 1 - 167 



1 a. Fragment of leaf, maguiBed. 



Fig. 3. Salix media, Gr. 4 a, 4 6 1C8 



Figs. 4, 5. Salix angl'sta, Gi. 1 , 4 « 1<J8 



Figs. C, 7. Salix elongata, Gr. 4 6 109 



Fig. 8. Popui.ns latior var. cordifolia, Gr. 3 172 



Fig. 9. Populcs l^vigata, Gr. 3 175 



Figs. 10-12. Popdlus Eichardsoni, Gr. 4 ft 177 



Fig. 13. PoPULUB Zaddachi, Gr. 4 n 176 



