SUMMER KEY TO THE SPECIES OF JUGLANS 
a; 
aa. 
Leaflets 11-17, the terminal usually present; pith of twigs 
chocolate-brown; bark of trunk rather smooth, or fissured, 
with broad, flat, whitish ridges; fruit elongated, sticky- 
OO WHY 28 wicadiatavids Sevag 14s haa anon eure es J. cinerea, p. 63. 
Leaflets 13-23, the terminal often lacking; pith of twigs 
eream colored; bark of trunk rough, brownish or blackish, 
deeply furrowed by broad, rounded ridges; fruit globose, not 
SHCKY=dOWNYs sor eGhiwaaeysva's essing a naraeas J. nigra, p. 65. 
