spiny fruit and its other distinctive traits.


AMERICAN LINDEN (_Tilia Americana_)

[Illustration: FIG. 77.--Bud of the Linden Tree.]

Distinguishing characters: The great distinguishing feature of any
linden is the *one-sided* character of its *bud* and *leaf*. The
bud, dark red and conical, carries a sort of protuberance which
makes it extremely one sided as shown in Fig. 77. The leaf, Fig. 78,
is heart-shaped with the side nearest the branch largest.

[Illustration: FIG. 78.--Leaves and Flowers of the European Linden.]

Form and size: The American Linden is a medium-sized tree with a broad
round head.

Range: Eastern North America and more common in the north than in the
south.

Soil and location: Requires a rich, moist soil.

[Illustration: FIG. 79.--European Linden Tree.]

[Illustration: FIG. 80.--Bud of the Umbrella Tree.]

Enemies: Its leaves are a favorite food of caterpillars and its wood is
frequently attacked by a boring insect known as the _linden borer_
(_Saperda vestita_).