Elm Family
1 genera
4 species
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Ulmus americanaAmerican elm
Distribution: Occurring on both sides of the Cascades crest in Washington; native to eastern and central North America, though escaped from cultivation elsewhere.
Habitat: Woodlands, pastures, old fields at low to moderate elevations.
Origin: Introduced
Flowers: February-April
Ulmus parvifolia
Origin: Introduced
Ulmus procerafield elm
Distribution: Occurring chiefly west of the Cascades crest in Washington, but also known from Kittitas County. Known from states scattered in southwestern, central, and northeastern U.S.
Habitat: Riparian areas, often where disturbed.
Origin: Introduced
Flowers: March-April
Ulmus pumilaSiberian elm
Distribution: Occurring chiefly east of the Cascades crest in Washington; introduced over much of the North America, where commonly escaping and naturalizing.
Habitat: Roadsides, fence rows, waste areas.
Origin: Introduced from Asia
Flowers: February-April