A Bud and Twig Key 



f. Stipule-scars none. 



di. Bud-scales felty, bundle-scars many scattered, pith 

 angled, twigs very tough, terminal buds broadly 

 ovate, four or more scales or scars left by early 

 deciduous scales. t Hicoria Raf . 



ei. Outer scales deciduous in autumn or early win- 

 ter. 



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

 or less obscurely lobed, terminal bud about 

 one-fourth inch long dome-shaped with acute 

 apex. Plate VII. H. glabra (Mill.) Britton. 



hieona 



Oslrya vtrqimana 



PLATS VII. 



C Cross-section of twig. 

 L Leaf-scar magnified. 



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. 



//. ovata (Mill.) Britton. 



t 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 seem to be a great many intermediate forms. Hicoria alba and 

 Hicoria ovata are especially hard to separate definitely. 



