. Introduction to botany. Botany. ELM FAjMILY 63 serrate, 3-4 in. long. Flowers in close clusters with very short pedi- cels. Fruit obovate-elliptical, with a fissure extending almost to the seed, nearly smooth and not ciliate. Considerably planted as a shade tree and rarely escaped from cultivation. Very variable, one variety with thick ridges of cork on the twigs. 3. U. americana L. A^'hite Elji. A large tree with gray bark, drooping branches, and smooth or slightly downy twigs. Leaves oval or obovate, abruptly taper-pointed at the apex, obtuse and oblique at the base, slightly rough above,
. Introduction to botany. Botany. ELM FAjMILY 63 serrate, 3-4 in. long. Flowers in close clusters with very short pedi- cels. Fruit obovate-elliptical, with a fissure extending almost to the seed, nearly smooth and not ciliate. Considerably planted as a shade tree and rarely escaped from cultivation. Very variable, one variety with thick ridges of cork on the twigs. 3. U. americana L. A^'hite Elji. A large tree with gray bark, drooping branches, and smooth or slightly downy twigs. Leaves oval or obovate, abruptly taper-pointed at the apex, obtuse and oblique at the base, slightly rough above, soft-downy or soon smooth beneath. Flowers in close fascicles; pedicels slender, smooth. Fruit oval or obovate, with 2 sharp teeth bending toward each other at the apex;. Fig. 12. TJlmus ca:nj,estrls A, a flowering twig; B, a flower; C, longitudinal section of a flower; D, a, fruit. {A, D, natural size; B, C, enlarged.) (After AVossidlo) wing reticulate-veined, downy on the margin. In moist, rich soil. A widely planted ornamental tree; wood strong but warping badly, and not durable when exposed.* 4. tJ. racemosa Thomas. Cork Elm, Rock Elm. A large tree 80- 100 ft. high, with the yoimg twigs somewhat downy; the branches often with ridges of cork. Leaves much as in U. americana, but smaller and less sharply serrate. Flowers racemed, on thread-like pedicels. Fruit oval, downy on the surface and densely ciliate. In rich soil, especially along river banks. A highly valuable timber tree. 5. U. alata Michx. Wixged Elm. A small tree with branches corky-winged. Leaves small, ovate-lanceolate, acute, sharply serrate, base nearly equal-sided, rough above, downy beneath, nearly Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bergen, Joseph Y. (Joseph Young), 1851-1917; Caldwell, Otis William, 1869- joint autho
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