One-third natural size.]

The _leaves_ resemble somewhat those of the common white oak, but have a

pair of deep indentations on their border near the base, and wavy

notches on the broad middle and upper portions of the leaf. They range

from 6 to 12 inches long and 3 to 6 inches wide. The _fruit_, or acorn,

is a nut set deeply in a fringed cup. It is sometimes 1 inch or more in

diameter but varies widely in respect to size and the degree to which

the nut is enclosed in the mossy fringed cup.

The _wood_ is heavy, hard, strong, tough and durable. It is used for

much the same purposes as the other white oaks, lumber, piling, veneer

logs, crossties and fuel.

The swamp white oak, _Quercus bicolor_ Willd., occurs scattered in

swamps, through the State. The leaves are obovate, coarsely toothed

and wedge-shaped below. They are thick, dark green and shining above,

pale and downy beneath. The acorns are borne in a deep rough scaly

cup, on stems 2-4 inches long. The wood is like that of the white oak.

The bark is gray-brown, separating into large, papery scales which

curl back.

+YELLOW CHESTNUT OAK+ _Quercus muhlenbergii_ Engelm.

THIS oak, also called the chinquapin oak, which is an excellent timber

tree, occurs throughout the State. It grows on practically all classes

of soil and in all moisture conditions except in swamps, and is a very

tenacious tree on shallow, dry soil. The _bark_ is light gray, and

breaks up into short narrow flakes on the main trunk and old limbs. It

reaches a height of 70 to 90 feet. The straight shapely trunk bears a

round-topped head composed of small branches, which makes it an

attractive shade tree.

[Illustration: YELLOW CHESTNUT OAK

Forest Trees of Illinois: How to Know Them · 第 74 / 124 题