A Bud and Twig Key 



ii 



ci. Buds pedicelled, terminal bud scurfy or slightly to- 

 mentose dark red, stipule-scars distinct but small, two 

 bud-scales visible valvate, bundle-scars three, leaf- 

 scars rounded crescent-shaped. Plate III. 



Alnus Ehrh. 



c2. Buds sessile, scales glabrous bright red or greenish, 

 one large scale makes bud imsymmetrical, usually 

 three scales visible, bundle-scars about eight scattered 

 through the broadly crescent-shaped leaf-scar, stipule- 

 scars distinct, one broad the other linear, no terminal 

 bud, tip-scar prominent, twigs medium size, buds mu- 

 cilaginous pleasant tasting. Plate III. 



Tilia americana Linn. 



. Buds at end of twig regular and symmetrical. 



ci. Stipule-scars extend half way around twig or farther. 



di. Terminal bud large ovate covered with long white 

 hairs, one scale visible, leaf scar large and oval or 

 lunate, bundle-scars about eight in a U-line or scat- 

 tered, stipule-scars extending completely around 

 twig join to form a narrow continuous line, twig 

 large. Plate III. Magnolia Linn. 



Ji/glans cmerea Jiiqlans nigra Alnus ruqosa Tilia amencana fiaqno/ 



PLATE III. 



L Leaf-scar magnified. 



LL Longitudinal section showing chambered pith. 



