American elm - Ulmaceae Ulmus americana

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ULAM

Taxonomy

FamilyUlmaceae
GenusUlmus
Speciesamericana
Common NameAmerican elm
iTree CodeULAM

Plant Form

FormTree: vase shaped canopy
Height120 feet
Spread70 feet
DeciduousYes

Identification Description

Foliagedoubly serrate edges, uneven at base, tip pointed (3-4"), V-venationLeaf Type Information IconSimple
Needles0
Barkgrayish (often white streaks present), furrowed ridges; cross-section has “bacon” pattern
Budfalse terminal bud, red/brown pointed, non-hairy; distinct overlapping scales (imbricate)Bud Arrangement Information IconAlternate
Twigslender, reddish brown in current year, then gray; zig-zag appearance
Flowersmall, clustered, green with red, white before leaves; male and female organs on same flower (perfect)
Fruitsmall, papery disk (samara) with hairs and notch at top
Fall Coloryellow

Site Characteristics

USDA Zones   info for zonespH LevelsSalt Tolerance
Min3bMin5.0SoilModerate
Max9bMax8.0SprayModerate

Shade ToleranceDrought ToleranceAllelopathy
IntermediateModerateNo

Species Status

Nebraska NativeYes Check
U.S. NativeYes Check
Region of OriginCanada, United States
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