WALNUT FAMILY. 391 



J. Sieboldiana, Maxim. JAPANESE W. Tree of medium to large size, 

 with pubescent shoots and leaves ; leaflets 11-17, large, elliptic-oblong 

 and acuminate, sessile, sometimes not strictly opposite, rather coarsely 

 serrate ; fruits in long clusters of 10-20, inversely top-shaped when the 

 husk is on, the shell thin and very little furrowed, the nude nut l'-2' 

 long. Japan. 



J. nigra, Linn. BLACK W. Large tree, with dark rough branches ; 

 stalks and shoots not clammy, minutely downy; leaflets smoothish, 

 ovate-lanceolate, serrate ; fruit spherical (rarely ovoid and sometimes the 

 husk striped). Mass., S. and W. 



* * Husk friable, separating when dry from the roundish and smoothish 



thin-shelled nut. 



J. regia, Linn. ENGLISH WALNUT, so called, but native of Asia ; leaf- 

 lets oval, entire, smoothish ; fruit ripens sparingly in Middle States. 



2. CART A, HICKORY. (Greek name of the Walnut, applied to these 

 North American trees.) Flowers in rather late spring; nuts fall in 

 autumn. 



* Sterile catkins in a sessile cluster; leaflets 13-15, short- stalked ; nut 



edible. 



C. olivaefdrmis, Nutt, PECAN. Along rivers, from Ind. and la., S.; 

 leaflets oblong-lanceolate, taper-pointed ; nut cylindrical-oblong, olive- 

 shaped, the seed delicious. Now cult, in the S. 



* * Sterile catkins 3 or more together on a common peduncle; leaflets 

 sessile or nearly so, of 5-9 or rarely 11-13 leaflets; nut globular or 

 short-oval. 



-H- Nuts sweet-tasted and edible (the hickory-nuts of the market) ; the 

 husk splitting into 4 thick and hard valves; buds large, of about 10 

 scenes. 



C. alba, Nutt. SHELLBARK or SHAGBARK H. Bark of old trunks 

 very shaggy, separating in rough wide strips ; inner bud scales becoming 

 very large and conspicuous on the young shoot; leaflets 5, the 3 upper 

 much larger and lance-obovate ; nut white, the meat high-flavored. N. 

 Eng., W. and S. 



C. sulcata, Nutt. WESTERN or BIG SHELLBARK H., KINGNDT. Dif- 

 fers from the foregoing in lighter-colored heart wood, 7-9 leaflets more 

 downy beneath ; fruit with very thick husk 4-ribbed above the middle, 

 and larger yellowish or dull-white nut (sometimes 2' long) mostly with 

 a point at both ends. N. Y., S. W. 



C. tomentdsa, Nutt. MOCKER NUT or WHITEHEART H. Bark rough, 

 but not splitting off in strips; shoots and lower surface of the leaves 

 woolly-downy when young; leaflets 7-9, lance-obovate, or the lower 

 lance-oblong ; fruit with very thick hard husk, and globular nut (not 

 flattish on the sides) brownish, very thick-shelled, hardly fit to eat. N. 

 Eng., W. and S., commonly on rich hillsides. 



C. microcarpa, Nutt. Bark somewhat shaggy, but separating in nar- 

 row thin plates ; foliage glabrous ; fruit rather small and thin-husked, 

 edible, but not rich. N. Y. to Del. and 111. Foliage and fruit smaller 

 than C. alba. 



*- *- Nuts bitter, in a rather thin and friable husk, which splits only at 

 the top, or tardily to near the base ; bark on the trunk close ; bud scales 

 falling early. 



C. porcina, Nutt. BROWN or BROOM H., PIGNUT. Bark of trunk 

 rough and furrowed, but not separating in plates ; bud scales about 10, 



