Index    Handbook of the Trees of New England by Lorin Low Dame, Henry Brooks

Betula lutea, Michx. f. Yellow Birch. Gray Birch.

Habitat and Range.—Low, rich woodlands, mountain slopes.

New England,—abundant northward; common throughout, from borders of lowland swamps to 1000 feet above the sea level; more common at considerable altitudes, where it often occurs in extensive patches or belts.

Habit.—A large tree, at its maximum in northern New England 60-90 feet high and 2-4 feet in diameter at the base. In the forest the main trunk separates at a considerable height into a few large branches which rise at a sharp angle, curving slightly, forming a rather small, irregular head, widest near the top; while in open ground the head is broad-spreading, hemispherical, with numerous rather equal, long and slender branches, and a fine spray with drooping tendencies. In the sunlight the silvery-yellow feathering and the metallic sheen of trunk and branches make the yellow birch one of the most attractive trees of the New England forest.

Bark.—Bark of trunks and large limbs in old trees gray or blackish, lustreless, deep-seamed, split into thick plates, standing out at all sorts of angles; in trees 6-8 inches in diameter, scarf-bark lustrous, parted in ribbon-like strips, detached at one end and running up the trunk in delicate, tattered fringes; season's shoots light yellowish-green, minutely buff-dotted, woolly-pubescent, becoming in successive seasons darker and more lustrous, the dots elongating into horizontal lines. Aromatic but less so than the bark of the black birch; not readily detachable like the bark of the canoe birch.

Winter Buds and Leaves.—Buds conical, ¼ inch long, mostly appressed, tips of scales brownish. Leaves simple, in alternate pairs or scattered singly along the stem; 3-5 inches long, ½-2 inches wide, dull green on both sides, paler beneath and more or less pubescent on the straight veins; outline oval to oblong, for the most part doubly serrate; apex acuminate or acute; base heart-shaped, obtuse or truncate; leafstalk short, grooved, often pubescent or woolly; stipules soon falling.

Inflorescence.—April to May. Sterile catkins 3-4 inches long, purplish-yellow; scales fringed: fertile catkins sessile or nearly so, about 1 inch long, cylindrical; bracts 3-lobed, nearly to the middle, pubescent, lobes slightly spreading.

Fruit.—Fruiting catkins oblong or oblong-ovoid, about 1 inch long and two-thirds as thick, erect: nut oval to narrowly obovate, tapering at each end, pubescent on the upper part, about the width of its wing.

Horticultural Value.—Hardy throughout New England; grows in wet or dry situations, but prefers wet, peaty soil, where its roots can find a constant supply of moisture; similar to the black birch, equally valuable in landscape-gardening, but less desirable as a street tree; transplanted without serious difficulty.

Differences between black birch and yellow birch:

Black Birch.—Bark reddish-brown, not separable into thin layers; leaves bright green above, finely serrate; fruiting catkins cylindrical; bark of twigs decidedly aromatic.

Yellow Birch.—Bark yellow, separable into thin layers; leaves dull green above; serration coarser and more decidedly doubly serrate; fruiting catkins ovoid or oblong-ovoid; flavor of bark less distinctly aromatic.

Plate XXXI.—Betula lutea.