WINTER KEY TO THE SPECIES OF JUGLANS 
a. Pith chocolate-brown; leaf-scar with downy pad above; fruit 
elongated, sticky-downy; terminal bud 4-34 inch long; bark 
rather smooth, or fissured, with broad, flat, whitish ridges.. 
eR ON ST eT OCR Ree errr J. cinerea, p. 63. 
aa. Pith cream colored; leaf-scar without downy pad shove ; 
fruit globose, not sticky-downy; terminal bud % inch long; 
bark rough, brownish or blackish, deeply furrowed by broad, 
rounded ‘rid@eSiwats on: sans tee ean vedsaaa ees J. nigra, p. 65. 
