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Siberian elm ~ <br />Ulrrrus pamila <br />Growth Form: irregular <br />Crown Density: moderate <br />Size: to 40 feel high <br />30-40 foot spread <br />Drought Resistance: excellent <br />Cold Hardiness: excellent <br />Grow(Ir Rale: rapid <br />Life Span: moderate <br />Elevatiorral Range: to 8,000 feet <br />Soil Conditions: tolerates alkaline well <br />Possihle Irrsec[ Problems: elm leaf beetle <br />Possible Disease Problems: bacterial wetwood <br />R'ildlije Ynlrre: moderate: song and game birds (seeds and <br />buds) <br />Seasorrnl Color: not conspicuous <br />Miscellany: hardiest of all elms; can be weedy <br />~i <br />Hybrid cottonwood (poplar) <br />Pnpulus delrnides (rm: Norensrer, Nnrrny) <br />CrowUi Forne: globular to irregular <br />Craws Density: moderate <br />Size: 75-100 feet high <br />I 50-75 foot spread <br />fl Drought Resistance: poor <br />Cold Hardiness: excellent <br />Growth Rafe: rapid <br />Life Span: moderate <br />Elevational Range: to 6,500 feet <br />Possible Insect Problems: leaf miners, fall webworm, <br />poplar borers, oyster shell scale <br />Possible Disease Problems: cytosporu canker; bacterial <br />wetwood. Marssonina leaf blight <br />Wildlife Value: fair: nesting and roosting cover <br />Miscellany: Noreaster -sterile female, usually cottonles's <br />hybrid; Norway -male <br />