. 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. 626 ULMACEAE. Vol. I. I. ULMUS (Tourn.) L. Sp. PI. 225. 1753. Trees, with 2-ranked straight-veined inequilateral serrate leaves, with thin caducous stipules. Flowers perfect or polygamous, fascicled or racemose, greenish, mostly axillary on the twigs of the preceding season. Calyx campanulate, 4-9-lobed, persistent, its lobes imbri- cated. Filaments erect, slen
. 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. 626 ULMACEAE. Vol. I. I. ULMUS (Tourn.) L. Sp. PI. 225. 1753. Trees, with 2-ranked straight-veined inequilateral serrate leaves, with thin caducous stipules. Flowers perfect or polygamous, fascicled or racemose, greenish, mostly axillary on the twigs of the preceding season. Calyx campanulate, 4-9-lobed, persistent, its lobes imbri- cated. Filaments erect, slender, exserted. Ovary sessile or stalked, compressed, 1-2-celled. Styles 2, divergent, stigmatic along the inner margin, ovule 1 in each cavity of the ovary, suspended, anatropous. Fruit a i-seeded flat orbicular or oval samara, its membranous wings continuous all around except at the apex, commonly as broad as or broader than the body. Embryo straight. [The ancient Latin name of the elm; Celtic, elm.] About 16 species, natives of the northern Besides the following two others occur in the southern United States and one in Mexico. Type species: Ulmus campestris L. Flowers appearing in the spring long before the leaves. Leaves smooth or slightly rough above ; samara densely ciliate. None of the branches corky-winged; samara-faces glabrous. i. U. americana. Some or all of the branches corky-winged;'samara-faces pubescent. Leaves z's' long; flowers racemose; northern. 2. U. Thomasi. Leaves 1'-3'long; flowers fascicled; southern. 3. Leaves very rough above ; samara not ciliate; twigs not corky-winged. 4. U. fulva. Flowers appearing in the autumn. 5. U. 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 o
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
