. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. American, White or Fig- 1539- 1. Ulmus »icana L. Water Elm. Ulmus americana L. Sp. PI. "226. 1753. A large tree, with gray flaky bark, and glabrous or sparingly pubescent twigs and buds; maximum height about 120°, and trunk diameter ii°; the branches not corky-winged, terete. Leaves oval or obovate, apex abruptly acuminate, base obtuse or obtusish, a
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. American, White or Fig- 1539- 1. Ulmus »icana L. Water Elm. Ulmus americana L. Sp. PI. "226. 1753. A large tree, with gray flaky bark, and glabrous or sparingly pubescent twigs and buds; maximum height about 120°, and trunk diameter ii°; the branches not corky-winged, terete. Leaves oval or obovate, apex abruptly acuminate, base obtuse or obtusish, and very inequilateral, sharply and usually doubly serrate, smooth or rough above, pubescent or becoming glabrous beneath, 2'-s' long, ii'--3' wide; flowers fascicled; pedicels filiform, drooping, jointed; calyx 7-9-lobed, oblique, its lobes oblong, rounded; samara ovate-oval, reticulate-veined, s"-6" long, its faces glabrous, its margins densely ciliate; styles strongly incurved. In moist soil, especially along streams, Newfoundland to Manitoba, Florida and Texas. Wood hard, strong, close-grained, compact, dark brown; weight per cubic foot lbs. March-April. Samaras ripe in May. The species consists of many slightly differing races. Swamp- or rock-elm. 2. Ulmus Thomasi Sarg. Cork or Rock Elm. Fig. 1540. ; racemosa Thomas, Am. Journ. Sci. 19 : 170. 1831. Not Borckh. Ulmus Thomasi Sargent, Silva 14: 102. 1902. A large tree, attaining a maximum height of about ioo° and a trunk diameter of 4°, the young twigs puberulent; bud-scales ciliate and somewhat pubescent; branches, or some of them, winged by narrow plates of cork. Leaves similar to the pre- ceding, but less sharply serrate, smooth above; flowers racemose; pedicels filiform, drooping, jointed; calyx-lobes oblong, rounded; samara oval, 6"-8" long, its faces pubescent or puberulent, its margins densely ciliate; persistent styles strongly incurved and overlapping. In rich soil, Quebec to Ontario, Mi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
