. Bulletin. Natural history; Natural history. Trees of Illinois 159 of yielding about G500 board feet per acre, which is about 3000 board feet more than either the Soft Maple or Red Gum can furnish; while en better-drained ground 3 trees per acre yield about -iSO board feet, as compared to 6800 board feet from the Red Gum. In the Wabash region, the White Elm yield is only 92 board feet per acre, but in the Rock River region it is high, being estimated at about 5300 board feet per acre. ULMUS RACEMOSA Tiiom.\s Rock Elm Cork Elm The Rock Elm is a moderately tall tree, with a long, straight bole
. Bulletin. Natural history; Natural history. Trees of Illinois 159 of yielding about G500 board feet per acre, which is about 3000 board feet more than either the Soft Maple or Red Gum can furnish; while en better-drained ground 3 trees per acre yield about -iSO board feet, as compared to 6800 board feet from the Red Gum. In the Wabash region, the White Elm yield is only 92 board feet per acre, but in the Rock River region it is high, being estimated at about 5300 board feet per acre. ULMUS RACEMOSA Tiiom.\s Rock Elm Cork Elm The Rock Elm is a moderately tall tree, with a long, straight bole from which short, stout branches spread to form a narrow, round-topped crown. The pointed, coarsely double-toothed, firm leaves, 2 to ^lA inches long by >'4 to 1 inch wide, are dark-green and shiny above but pale and soft-hairy beneath. The slender- pediceled flowers stand in group-; of 2 to 4 along the axes of floral stalks up to 2 inches long. The oval, pale- hairy fruit is about ]/> inch long, with a shallow, open notch between the tips of its hair-fringefl wings. The light recldish-ljrown twigs, eventually fur- nished with 3 or 4 irregular, thick, corky wings, bear pointed brown buds about 34 iiich long. The red-tinted, gra}- bark is deeply fissured into broad, flat ridges with scaly surfaces. The tree is usually SO feet high or more and its trunk may be as much as 3 feet in diameter. Distribution: From Quebec, Wis- consin, and Nebraska, the Rock Elm ranges southward, on limestone ridges, steep hillsides, gravelly soils, and glacial drift, to northern New Jersey. Ohio, and Indiana. In Illinois, it is an infrequent tree, probably limited to our most northern counties.*. Fig. 61. Distribution of the Rock Elm. * The record for Kane county is based on specimens collected by George A. Vasey in 1865, and that for Will County on a specimen collected by Agnes Chase in 1899. Specimens labeled Vlmus racemosa, and collected by .Jacob Schneck from Johnson County, and by E. W. Mat
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
