A Bud and 7\v/// Kc\ 



67 



b2- Bud at end of twig quite regular in outline but unsym- 



metrical in form, scales not felty. 



c/. 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- 

 scar rounded crescent-shaped. 



Alnus Ehrh. 



C2. Buds sessile, scales glabrous bright red or greenish, 

 one large scale makes bud unsymmetrical, 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 

 mucilaginous pleasant tasting. 



Tilia americana Linn. 

 bj. 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. Magnolia Linn. 



dz. Bud at end of twig small nearly conical glabrous 

 red or greenish, leaf-scar encircles bud, one scale 

 visible, stipule-scar extends completely around 

 twig as one continuous line, bundle-scars about eight 



cmerea J~uqlans n/gra Alnus ruqosa 7///O americana fiaqnc/>> 



L Leaf-scar magnified. 



LL Longitudinal section showing chambered pith. 



