2 species
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Epipactis giganteagiant helleborine
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to the Rocky Mountains.
Habitat: Stream banks, lake margins, around springs and seeps, especially in thermal waters in otherwise desert regions.
Origin: Native
Flowers: April-July
Epipactis helleborinebroad-leaved helleborine, garden helleborine
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, in scattered locations across central Canada and the U.S.; the Upper Midwest and Northeast U.S.
Habitat: Moist to dry, shady woods, disturbed sites.
Origin: Introduced from Eurasia
Flowers: June-October