130 Procccdiii OS of flic Ohio State .icaciciiiy of Science 



1. Juglans nigra L. lUack Walnut. A large tree with 

 rDrgh brownish black bark and a long tap root. Wood heavy, 

 hard, strong, of coarse texture ; heart-wood dark brown, of great 

 value; used for cabinet-work, interior finish, gun-stocks, turn- 

 ery, and as veneer. Common on flood plains of streams. Mass. 

 to Out. and Minn., south to Kan., Tex. and Fla., Ohio. 



;2. Juglans cinerea L. JUitternut. A large tree with 

 gray bark the outer surface of the ridges smooth. Heart-wood 

 lighter colored and softer than in J. nigra ; used for ornamental 

 cabinet-work, mterior finish, and cooperage. In rich or rocky 

 woods. N. B. to X. Dak., Xel)., Del., (la., Ark., and Ohio. 



*. Juglans. regia L. English Walnut. A round-headed 

 tree with the leaflets almost entire and nearly glabrous. Husk 

 of the nut friable. Ctiltivated for the sweet nuts; from Asia. 



15. Hicoria Raf. Hickory. 



Trees with ()(l(l-])innate leaves and serrate leaflets; monoe- 

 cious. Axillary buds usuall}' sujierposed ; pith solid, 5-angled. 

 Staminate flowers in aments. Fruit a nut in a husk. 



1. Terminal bud-scales valvate. 4-(i ; leaflets 7-lo, lanceolate or oblong- 

 lanceolate, more or less falcate. 2. 



1. Terminal bud-scales imbricate, more than (i ; leaflets 3-U, not falcate, 



the uppermost larger and generally obovate. 4. 



2. Nut elongated, almost terete, seed sweet: leaflets 11-15, inequi- 



lateral, acuminate. H. f^ccaii. 



2. Nut somewhat compressed or angled, usually as broad as long; seed 



intensely Irltter : lateral leaflets falcate. .3. 



3. Leaflets 7-9; nut smooth; husk thin, splitting to below the middle. 



H. Jiiiiiiina. 



3. Leaflets 9-13; nut angled, husk thin. s]ilitting to the base. H. 



aquatica. 



4. Terminal bud large, i-1 in. long ; liusk splitting freely to the base, 



nut angled, seed sweet; middle lobe of the staminate calyx nar- 

 row, often at least twice as long as the lateral ones. 5. 



4. Terminal bud small, ^-i in. long; husk thin, not splitting freely 

 to the base, nut slightly or not angled ; lobes of the staminate 

 calyx mostly nearly equal. 8. 



■5. Bark shaggy, separating in long plates; husk very thick, splitting 

 to the base ; outer bud-scales persisting through the winter. 6. 



