= nonnative, planted and a wildland component, commonly "escapes" cultivation
= nonnative, planted, generally not considered a wildland component or invasive
= a North American native, may naturalize outside its native range
Genus: Ulmus
    Ulmus alata - winged elm
    Ulmus americana - American elm     Landowner Factsheet
    Ulmus crassifolia - cedar elm
    Ulmus minor - field elm
    Ulmus parvifolia - Chinese elm
    Ulmus pumila - Siberian elm
    Ulmus rubra - slippery elm