IN THEIR WINTER CONDITION. 7 



Buds not clustered. 



Scales gummy; stipule-scars present. 



Populus. 4<i 



Scales not gummy; no stipule-sears. 



Ilicoria. 41 



Pith cylindrical. 



gTwigs pubescent, at least at apex. 



Pith diaphragmed Juglans. 40 



Pith homogeneous. 



Brown Ailanthus. 5 



White. 



Leaf -scars V-shaped Pyrus. 26 



Leaf-scars heart-shaped Sapindus. 14 



Leaf-scars small, semi-oval. 



Scales obscure, cottony-villous. 



Ceanothus. 9 



Scales apparent, glabrescent. 



Amorpha. 18 



ggTwigs glabrous. 



*] Stipule-scars present. 



Extending around twig Platanus. 39 



Not extending around twig. 

 Buds superposed. 



Leaf-scars semi-oval Amorpha. 18 



Leaf -scars U-shaped Gleditsia. 22 



Buds single. 



Scale one Salix. 4- r ) 



Scales several. 



Bundle-scar 1 ; twigs gray . . Rhamnus. 8 

 Bundle-scars 3; twigs dark. 



Leaf-scars V-shaped Pyrus. 26 



Leaf-scars oval Primus. 23 



UlfStipule-scars absent. 



Terminal bud absent Gymnocladus. 21 



Terminal bud present Hicoria. 41 



