336 JUGLANDACE^E. 



1. JUGLANS. Linn. Walnut. 

 (From the Latin Jovis glans, the nut of Jupiter ; on account of its excellence.) 



Monoecious. STERILE FL. Ament imbricate ; scales mostly 

 5-parted, sometimes bracteate. Perianth 5- or 6-parted. Sta- 

 mens 8 40. FERTILE FL. Perianth double ; the outer one 

 short, 4-toothed ; the inner one 4 -parted. Styles 2, very short. 

 Stigmas 2, somewhat clavate. Drupe fibrous-fleshy, indehiscent. 

 Nut rugose and irregularly furrowed. 



1. J. nigra Linn.: leaves pinnate; leafets numerous, ovate-lanceolate, 

 serrate, subcordate, tapering to the summit, the under surface and petioles 

 slightly pubescent ; fruit globose, roughly dotted, spongy ; nut nearly glo- 

 bose, corrugated. 



Fertile woods. N. Y. to Flor. W. to Miss. April, May. A tree, 3060 

 feet high, with a large spreading top. Leaves pinnate, with from 15 21 leafets. 

 Sterile aments axillary, cylindric, pendulous. Timber compact, fine grained, 

 heavy and dark colored when exposed to the air. Black Walnut. 



2. J. cinerea Linn, : leaves pinnate ; leafets numerous, oblong-lanceo- 

 late, serrate, rounded at the base, softly pubescent beneath; petioles villous; 

 fruit ovoid-oblong, coriaceous, hairy and viscid ; nut elliptic-oblong, acumi- 

 nate, conspicuously sculptured. J. cathartica Mich. f. 



Woods. Can. toGeor. W. to Miss. April, May. A large tree. Leaves pin- 

 nate, with 15 17 pubescent leafets. Habit and fructification very similar to 

 the preceding, but the fruit is oblong, with a tapering protuberance at the sum- 

 mit, and the nut much more deeply and irregularly sculptured. The inner bark 

 yields a laxative extract. Butternut. White Walnut. 



2. CARYA. Nutt. Hickory. 



(From the Greek Kapva, an ancient name of the Walnut.) 

 Monoacious. STERILE FL. Aments mostly in threes, slender, 

 imbricate; scales 3-parted. Stamens 3 8. Anthers sessile, 

 hairy. FERTILE FL* Perianth single, 4-cleft. Drupe cori- 

 aceous or somewhat fleshy, 4-valved. Nut oval, somewhat 

 4-sided, smooth. 



1 . C. siilcatn, Nidt. : leafets generally 9, obovate-lanceolate, acuminate, 

 serrate, pubescent beneath, terminal one subsessile and attenuate at base ; 

 fruit roundish, 4-angled; nut oblong, slightly compressed, conspicuously 

 mucronate. Juglans sulcata Wiild. J. mibcronata Mich, and J. laciniosa 

 Mich.f. 



Fertile soils. N. Y. to Car. April, May. A large tree. Leaves pinnate, 

 with 7 9 leafets. Sterile aments 3-parted, very long, peduncled. Nut large, 

 oblong, with a very thick 4-parted pericarp. This, like most of the species, is 

 valuable for fuel. Thick Shell-bark Hickory. 



2. C. alba Nutt. . leafets 5 7, on long petioles, obovate and oblong-lan- 

 ceolate, acuminate, sharply serrate, villous beneath, the terminal one ses- 



