WINTER KEY TO THE SPECIES OF JUGLANS 



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

 elongated, sticky-downy; terminal bud 5^-^ iircih long; bark 

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



7. cinerea, p. 63. 



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

 fruit globose, not sticky-downy; terminal bud Yz inch long; 

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

 rounded ridges. /. nigra, p. 65. 



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