WALNUT FAMILY 53 



1. J. cinerea L. Butternut. Leaflets 15-19, ovate-lanceolate, 

 taper-pointed at the apex, rounded or slightly unsymmetrical at the 

 base, serrate, downy beneath ; petioles, branchlets, and fruit clothed 

 with short, sticky hairs. Fruit often somewhat in clusters, oblong, 

 large. More common northward. Wood less valuable and nut less 

 oily than the black walnut. The English walnut (/. regia) is 

 occasionally seen in cultivation. It has 7-11 leaflets and a nearly 

 smooth nut.* 



2. J. nigra L. Black Walnut. Leaflets 13-21, ovate-lanceolate, 

 serrate, taper-pointed, somewhat cordate or oblique at the base, 

 nearly smooth above, downy beneath; petioles minutely downy. 

 Fruit usually single, roundish, about 2 in. in diameter. On rich soil, 

 rare near the coast. One of the most valuable of our native trees, 

 the wood being very durable and highly prized for cabinet work.* 



n. CAHYA Nutt. (HICORIA) 



Leaflets serrate. Staminate catkins usually iu threes on a 

 common peduncle, or sometimes sessile at the base of the 

 growth of the season ; calyx 2-3-parted ; stamens 3—10, fila- 

 ments short. Pistillate flowers 2-5 in terminal clusters ; 

 calyx 4-parted ; petals none ; styles 2 or 4, fringed. Fruit 

 somewhat globular, husk separating more or less completely 

 into 4 valves ; nut smooth or angled.* 



1. C. illinoensis K. Koch. Pecan. A large tree with rough gray 

 bark, young twigs and leaves downy, nearly smooth when mature. 

 Leaflets 11-15, oblong-lanceolate, acuminate, serrate, scythe-shaped. 

 Staminate catkins nearly sessile, 5-6 in. long. Husk of fruit thin ; 

 nut oval or oblong, thin-shelled. River bottoms. Rarely native east 

 of the Mississippi River, but widely planted for its fruit.* 



2. C. ovata K. Koch. Shellbark Hickory. A large tree with 

 bark scaling off in long plates; young twigs and leaves downy, becom- 

 ing smooth with age. Leaflets 5, the lower ones oblong-lanceolate, the 

 upper one longer and obovate, taper-pointed at the apex, narrowed 

 to the sessile base. Inner bud scales becoming large and conspicu- 

 ous. Staminate catkins in threes. Fruit globose, husk thick, split- 

 ting into four sections ; nut white, compressed, 4-angled, pointed, 

 thin-shelled. On rich soil; more common N. Wood strong and 

 elastic, but not durable when exposed.* 



3. C. laciniosa Loud. Big Shellbark, King Nut, Bull Nut. A 

 tree 70-90 ft. high, with shaggy bark. Leaflets Y or 9, the terminal 



■ one nearly sessile. Fruit large, ovoid or nearly so, 4-grooved toward 

 the outer end, the husk very thick, nut pointed at each end, lJ-2 in. 



