WINTER KEY TO THE SPECIES OF JUGLANS 



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

 elongated, sticky-downy; terminal bud Yz-^4 inch long; bark 

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

 J. cinerea, p. 63. 



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

 fruit globose, not sticky-downy; terminal bud */3 inch long; 

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

 rounded ridges /. nigra, p. 65. 



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