[Illustration: PECAN One-quarter natural size.] The _leaves_ resemble those of the other hickories and the black walnut. They are made up of 9 to 17 leaflets, each oblong, toothed and long-pointed, and 4 to 8 inches long by about 2 inches wide. The _flowers_ appear in early spring and hang in tassels from 2 to 3 inches long. The _fruit_ is a nut, 4-winged or angled, pointed from 1 to 2 inches long, and one-half to 1 inch in diameter, borne in a husk which divides along its grooved seams when the nut ripens in the fall. The nuts, which vary in size and in the thickness of the shell, have been greatly improved by selection and cultivation and are sold on the market in large quantities. The _wood_ is strong, tough, heavy and hard and is used occasionally in making handles, parts for vehicles, for fuel and for veneers. The water hickory, _Carya aquatica_ Nutt., is a smaller tree, found in swamps in southern Illinois, with leaves made up of 7 to 13 leaflets; the nut is thin-shelled, angular and bitter. +SHAG-BARK HICKORY+ _Carya ovata_ K. Koch THE shag-bark hickory is well known for its sweet and delicious nuts. It is a large commercial tree, averaging 60 to 100 feet high and 1 to 2 feet in diameter. It thrives best on rich, damp soil and is common along streams, on rich uplands, and on moist hillsides throughout the State. [Illustration: SHAG-BARK HICKORY Leaf, one-third natural size. Twig, one-half natural size.] The _bark_ of the trunk is rougher than other hickories, light gray and separating into thick plates which are only slightly attached to the tree. The terminal _winter buds_ are egg-shaped, the outer bud-scales having narrow tips. The _leaves_ are alternate, compound, from 8 to 15 inches long, and composed of 5, rarely 7 obovate to ovate leaflets. The twigs are smooth or clothed with short hairs. The _fruit_ is borne singly or in pairs and is globular. The husk is thick and deeply grooved at the seams. The nut is much compressed and pale, the shell thick, and the kernel sweet. The flowers are of two kinds, opening after the leaves have attained nearly their full size. The _wood_ is heavy, hard, tough and strong; it is white largely in the manufacture of agricultural implements and tool handles, and the building of carriages and wagons. For fuel the hickories are the most satisfactory of our native trees. The big shell bark or king-nut hickory, _Carya laciniosa_ (Michx. f.) Loud., becomes a tall tree on the rich bottom lands in the southern half of Illinois. It resembles the shag-bark hickory but the leaves are longer with 7 to 9 leaflets, and the nuts are 2 inches long with a thick bony shell and a sweet kernel. +MOCKERNUT HICKORY+ _Carya tomentosa_ Nutt. THE mockernut, or white hickory, is common on well-drained soils throughout the State. It is a tall, short-limbed tree often 60 feet high and 1 to 2 feet in diameter. [Illustration: MOCKERNUT HICKORY