Bark.—Dark gray, irregularly and broadly striate, rather firmly ridged, in very old trees sometimes partially detached in plates; branches ash-gray, smooth; branchlets reddish-brown; season's shoots often pubescent, light brown in late fall.
Winter Buds and Leaves.—Buds ovate, brown, flattened, obtuse to acute, smooth. Leaves simple, alternate, 2-5 inches long, 2-3 inches wide, dark green and roughish above, lighter and downy at first beneath; outline ovate or oval to obovate-oblong, sharply and usually doubly serrate; apex abruptly pointed; base half acute, half rounded, produced on one side, often slightly heart-shaped or obtuse; veins straight and prominent; leafstalk stout, short; stipules small, soon falling. Leaves drop in early autumn.
Inflorescence.—April. In loose lateral clusters along the preceding season's shoots; flowers brown or purplish, mostly perfect, with occasional sterile and fertile on the same tree; stems slender; calyx 7-9-lobed, hairy or smooth; stamens 7-9, filaments slender, anthers exserted, brownish-red; ovary flat, green, ciliate; styles 2.
Fruit.—Ripening in May, before the leaves are fully grown, a samara, ½ inch in diameter, oval or ovate, smooth on both sides, hairy on the edge, the notch in the margin closed or partially closed by the two incurved points.
Horticultural Value.—Hardy throughout New England; grows in any soil, but prefers a deep, rich loam; the ideal street tree with its high, overarching branches and moderate shade; grows rapidly, throws out few low branches, bears pruning well; now so seriously affected by numerous insect enemies that it is not planted as freely as heretofore; objectionable on the borders of gardens or mowing land, as the roots run along near the surface for a great distance. Very largely grown in nurseries, usually from seed, sometimes from small collected plants. Though so extremely variable in outline, there are no important horticultural forms in cultivation.
Plate XLVIII.—Ulmus Americana.
| 1. Winter buds. |
| 2. Flowering branch. |
| 3. Flower, side view. |
| 4. Fruiting branch. |
| 5. Mature leaf. |