WINTER KEY TO THE SPECIES OF JUGLANS 



a. Pith chocolate-brown; leaf-scar with downy pad above; fruit 

 elongated, sticky-downy : terminal bud V^-Y^ incih long ; bark 

 rather smooth, or fissured, with broad, flat, whitish ridges.. 



;.../. cinerea, p. 63. 



aa. Pith cream colored; leaf-scar without downy pad .above; 

 fruit globose, not sticky-downy; terminal bud ]/$ inch long; 

 bark rough, brownish or blackish, deeply furrowed by broad, 

 rounded ridges /. nigra, p. 65. 



Cl 



