. / Hud and Ta'/</ /\Vy 



77 



C2. 



d2. 



ovate, four or more scales or scars left by early 

 deciduous scales. 



Hicoria Raf. 

 . Outer scales deciduous in autumn or early 



winter. 



//. Bud-scales two exposed, leaf-scars small more 

 or less obscurely lobed, terminal bud about 

 one-fourth inch long dome-shaped with acute 

 apex. 



* H. glabra (Mill.) Britton. 



J2. Terminal buds one-half to three-fourths inch 

 long, three or four outer scales deciduous in 

 autumn, exposed scales densely tomentose or 

 silky, leaf-scars more or less obscurely lobed. 



* H. alba (Linn.) Britton. 



* H. ovata (Mill.) Britton. 



Outer scales remain until spring, terminal bud 

 three-fourths to one inch long, leaf-scar three- 

 lobed, twigs stout, outer scales eleven or twelve, 

 leaf-stocks of previous year often persist. 



* H. laciniosa (Michx.) Sargent. 

 Bud-scales glabrous or slightly pubescent, bundle- 

 scars one or three, pith round. 



;: It is difficult to distinguish between the species of this group 

 of Hickories even when all characteristics, leaf, fruit, bark, etc. are 

 at hand, for -there seems to be a great many intermediate forms. 

 Hicoria alba and Hicoria ovate are especially hard to separate definitely. 





C Cross-section of twig. 

 L Leaf-scar magnified. 



