HICKORY NUTS. 155 



PECAN NUT, ILLINOIS NUT (Hicoria Pecan. Mar- 

 shall). Leaves with thirteen to fifteen leaflets, oblong- 

 lanceolate, serrate, pointed; nuts mostly oblong, smooth; 

 husk thin, somewhat four-angled and four-valved, these 

 at maturity shrinking, and falling apart when dropping 

 to the ground. Shell of nut generally thin, smooth or 

 slightly corrugated, varying widely in both form and 

 size from less than one inch in length to nearly or quite 

 two inches, abruptly blunt, or long and sharp pointed ; 

 the two-lobed cotyledon or kernel oily, sweet and deli- 

 cious. A large, tall, but usually slender tree, with 

 smooth or slightly furrowed bark, as seen in Fig. 45. 

 Mainly indigenous to river bottoms in the Southern and 

 Southwestern States, extending northward to Indiana, 

 Illinois, Missouri and Southern Iowa. 



Synonyms and their authors : 



Juglans Pecan, Marshall, Arboretum Americanum, 

 1785. 



Juglans Pecan, Walter, 1787. 



Juglans olivceformis, Willdenow, 1809. 



Carya olivceformis, Nuttall, 1818. 



Juglans Illinoiensis, Wangenheim, 1787. 



Juglans angustifolia, Aiton, Hortus Kewensis. 



Juglans rubra, Gaertner. 



Juglans cylindrica, Lamarck. 



SHELLBARK OR SHAGBARK HICKORY (Hicoria alba. 

 Clayton). Leaflets mostly five, occasionally seven, the 

 three upper ones obovate-lanceolate, the lower pair much 

 smaller and oblong-lanceolate, as shown in Fig. 46, all 

 taper-pointed, finely serrate, and slightly downy under- 

 neath. Terminal buds large and scaly. Fruit globose, 

 somewhat depressed; husk smooth, very thick, firm, 

 scarcely shrinking at maturity, but opening and falling 

 with the nuts when ripe. Nuts variable in size, mainly 

 thin-shelled, white, compressed or flattened, four-angled, 

 with deep corrugations, blunt, rarely sharp-pointed; 



