Читать книгу Studies of Trees - Jacob Joshua Levison - Страница 24

Distinguishing characters: The terminal twigs of glossy olive green color are flattened below the bud. Fig. 22. The bud is rusty-brown.

Fig. 22.—Twig of White Ash.

Leaf: Five to nine leaflets. Fig. 23.

Form and size: A large tree with a straight trunk.

Range: Eastern North America.

Soil and location: Rich, moist soil.

Enemies: In cities it is very often attacked by sucking insects.

Value for planting: The white ash grows rapidly. On account of its insect enemies in cities, it should be used more for forest planting and only occasionally for ornament.

Commercial value: It has a heavy, tough, and strong wood, which is valuable in the manufacture of cooperage stock, agricultural implements, and carriages. It is superior in value to the black ash.

Other characters: The bark is gray. The flowers appear in May.

Comparisons: The white ash is apt to be confused with the black ash (Fraxinus nigra), but differs from the latter in having a lighter-colored bud. The bud of the black ash is black. The bark of the white ash is darker in color and the terminal twigs are more flattened than those of the black ash.

Fig. 23.—Leaf of White Ash.