. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Planer Tree 35^ are rough-hairy and green, but soon become gray or brown and are smooth or nearly so after their first season. The leaves are ovate, oval, or sometimes obo- vate, usually long-pointed, firm in texture, 7 to 18 cm. long, the upper surface exceedingly rough-papillose and dark gxeen, with the veins impressed, the under side usually densely covered with whitish hairs; their edges are sharply and usually coarse
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Planer Tree 35^ are rough-hairy and green, but soon become gray or brown and are smooth or nearly so after their first season. The leaves are ovate, oval, or sometimes obo- vate, usually long-pointed, firm in texture, 7 to 18 cm. long, the upper surface exceedingly rough-papillose and dark gxeen, with the veins impressed, the under side usually densely covered with whitish hairs; their edges are sharply and usually coarsely doubly toothed; the stipules fall away soon after the leaves un- fold; the leaf-stalks vary from 3 to 10 mm. in length. The flowers appear in early spring before the leaves, in small, dense clusters; the hairy calyx is lobed to the middle or above, and is about two thirds as long as the stamens; its lobes are blunt. The samaras are short-stalked, oval-orbicular, 12 to 18 nmi. long, hairy over the seed but otherwise smooth, sometimes sHghtly notched, but not 2- beaked as in our other Elms, bearing the 2 very small stigmas. The wood is durable in the soil, and is used for sills, posts, and railway-ties; also for implements, tools, and hubs; its specific gravity is about and its color is brown or reddish brown. The powdered inner bark is used for poultices. II. PLANER TREE GENUS PLANERA GMELIN Species Planera aquatica (Walter) Gmelin Anonymos aquatica Walter HE Planer-tree, also called Water-ehn, is the only representative of its genus, and thus known sci- entifically as a monotype. It grows in swamps, ranging from North Carolina to Florida, westward to Kentucky, southern Illinois and Mis- souri to Texas, and much resembles a small-leaved Elm, but may be distin- guished from Ulmus by its fruit, which is a small nut covered with short soft pro- jections, and by its monoecious or some- times polygamous flowers, which appear with the leaves in early spring. It is a small tree
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