66 Forest Club Annual 



di. Pith brown chambered, bundle-scars three, often 

 with two to four small superposed axillary buds, 

 twigs large, leaf-scar three-lobed, three bundle- 

 scars one in each lobe, the lowest bundle-scar U- 

 shaped, terminal buds large gray-brown with three 

 or four irregular scales indistinctly visible. 



Juglans Linn. 



ci. Band of pale tomentum elevated between leaf- 

 scar and axillary buds, terminal bud one-half to 

 three-fourths inch long often with pinnate apex, 

 pith usually dark brown, twig greenish brown 

 slightly pubescent. 



/. cinerea Linn. 



C2. Without band of tomentum between leaf-scar 

 and buds, terminal bud about one-fourth inch 

 long, pith usually light brown, twig reddish 

 brown slightly pubescent. 



* /. nigra Linn. 

 * /. rupestris Engelm. 



d2. Pith nearly white solid, bundle-scars many scatter- 

 ed, axillary buds small quite regular and sym- 

 metrical, leaf-scars obscurely three- lobed, terminal 

 buds one-half inch long compressed, usually two 

 scales visible. 

 ci. Terminal bud bright yellow, leaf-scar small. 



Hicoria minima (Marsh) Britton. 

 62. Terminal bud covered with a dark brown glandu- 

 lar pubescence,** leaf-scar large with thin mem- 

 branaceous border around it. 



Hicoria pecan Britton. 



d$. Pith white solid often with woody transverse par- 

 titions, bundle-scars about five in a U-line, axillary 

 buds small oval, leaf-scars crescent-shaped narrow, 

 terminal buds very narrow about one-fourth inch 

 long, no scales distinct, very dark brown densely 

 silky, twigs small, branchlets with longitudinal 

 shallow grooves. 



Asimina triloba (Linn.) Dunal. 



*Distinction between these two species is rather difficult from twigs 

 alone. /. rupestris has larger terminal buds, usually between one-fourth 

 and one-half inch long, pubescence on twigs remains until the second 

 year, branches in their fourth year are nearly white. /. nigra has 

 terminal buds usually a little less than one-fourth inch long, the branch- 

 lets in the second year are glabrous. 



** United States Forest Service Bulletin 80. 



