108 Field Manual 



equilateral, acuminate; fruit oblong-cylindric ; husk thin, 4- 

 valved; nut smooth, oblong, thin-shelled, pointed, seed de- 

 licious and important commercially ; wood hard, brittle, light 

 I)ro\vn. Along streams and in moist soil. Tnd. to Iowa and 

 Kan., south to Ala. and Tex. 



2. Hicoria cordiformis (Wang.) Britt. Bitternut 

 (Hickory). A slender tree with close rough bark. Leaflets 

 7-11, sessile, long-acuminate, the lateral ones falcate; fruit 

 subglobose, narrowly G-ridged ; husk thin tardily and irregu- 

 larly 4-valved ; nut short-pointed, thin-shelled. Wood heavy, 

 strong, and tough. In moist woods and swamps. Quebec to 

 Minn., Fla., and Tex. 



3. Hicoria aquatica (Mx. f.) Britt. Water Hickory. 

 A tree with close bark, living in swamps. Leaflets 9-13, 

 lanceolate, or the terminal one oblong, long acuminate at 

 the apex, narrowed at tlie base, the lateral ones falcate; fruit 

 ( Ijlon-j-. ridged, pointed; husk thin, tardily splitting; nut Oiblong, 

 thin-shelled, angular. Wood 6f poorer quality than that of 

 other hickories. Va. to Fla., 111., Ark., and Tex. 



4. Hicoria microcarpa (Nutt.) Britt. Small-fruited 

 Hickory. A tree having the older bark separating in narrow 

 plates. Leaflets 5-7. oblong, or ovate-lanceolate, acuminate at 

 the apex; fruit globose or globose-oblong; husk thin, tardily 

 and incompletely splitting to the base ; nut subglobose, slightly 

 compressed, thin-shelled, pointed ; seed sweet. Wood hard, 

 strcng and tough. In rich soil. Mass. to Ohio and Mich.. 

 Va.. Ga.. 111., and Mo. 



5. Hicoria glabra (Mill.) Bntt. Pignut (Hickory). A 

 tree with close rough bark. Leaflets 3-7, rarely 9, oblong, 

 oblon-^-lanceolate or the upper obovate, sessile, acuminate at 

 the apex, usually narrowed at the base; fruit obovoid or 

 obovoid-cblong; husk thin, the valves very tardily dehiscent; 

 nut brown, angled, pointed, very thick-shelled; seed bitter 

 and astringent, not edible. Wood hard, strong, tough, and 

 rather dark brown. In dry or moist soil. Me. to Ont., Minn., 

 Kan.. Tex., and Fla. 



(i. Hicoria villosa (Sarg.) Ashe. Scurfy Hickory. A 

 small or medium-sized tree with deeply furrowed, dark gray 

 bark. Leaflets 5-9. thickly covered beneath with silvery pel- 

 tate glands, mixed with resinous globules, generally pubescent ; 

 fruit obovoid. the husk partly splitting; nut brown, thick- 



