WALNUT FAMILY 53 
1. J. cinerea L. Butrernut. 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 (J. regia) is 
occasionally seen in cultivation. It has 7-11 leaflets and a nearly 
smooth nut.* 
2. J. nigra L. Brack Watnut. 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.* 
Il. CARYA Nutt. (HICORIA) 
Leaflets serrate. Staminate catkins usually in 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. 
Leafiets 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. SuHettpark 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. Bre SHeLiBarK, Kine Nut, Butt Nut. A 
tree 70-90 ft. high, with shaggy bark. Leaflets 7 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, 11-2 in. 
