JUGLANDAGEAE 



Black Walnut 



Juglans nigra L. 



HABIT. A tree 60-90 feet high and 2-3 feet in diameter 

 (max. 150 by 6 feet); trunk straight and clear; crown broad 

 and open. 



LEAVES. 1-2 feet long with 15-23 leaflets; leaflets 3-4 inches 

 long, ovate-lanceolate, finely serrate, yellow-green, glabrous 

 above and hairy below. 



FRUIT. Globose; lV^-2 inches in diameter; solitary or in 

 clusters of 2-3; husk thick, yellow-green, pubescent; nut shell 

 corrugated. 



TWIGS. Stout, light brown; leaf scar obcordate, without 

 downy pad at top; chambered pith buff" colored with thin dia- 

 phragms. Winter buds: terminal Yi inch long, ovoid, blunt, 

 hairy, lateral buds smaller, often superposed. 



BARK. Thick; dark brown to nearly black; deep, narrow 

 furrows. 



WOOD. Heavy; hard; strong; very valuable and important. 



SILVICAL CHARACTERS. Fast growing; long-lived; on 



fertile, moist soils; in mixed stands; reproduction depends 



largely on rodents. 



* * * 



Butternut 

 Juglans cinerea L. 



HABIT. A tree 30-60 feet high and 1-2 feet in diameter 

 (max. 110 by 3 feet); trunk short; crown broad and open. 



LEAVES. 1-21/2 feet long with 11-17 leaflets; leaflets 2-4 

 inches long, oblong-lanceolate, serrate, yellow-green, rugose 

 above and hairy below. 



FRUIT. Oblong-ovoid; li^-2V^ inches long; solitary or in 

 clusters of 2-5; husk green-brown, sticky, glandular-hairy; nut 

 shell deeply corrugated. 



TWIG. Stout, green to red-brown; leaf scar straight across 

 top with dense hairy pad at top; chambered pith dark choco- 

 late-brown with thick diaphragms. Winter buds: terminal 

 V2-M inch long, conical, flattened, hairy; lateral buds smaller, 

 rusty-tomentose . 



BARK. Rather thick; light gray; smooth on young trunks, 

 becoming shallowly furrowed with broad ridges, 



WOOD. Rather light and soft; light brown; substitute for 

 walnut. 



SILVICAL CHARACTERS. Fast growing; short-lived; 

 varied sites; in mixed stands. 



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