Family = Orchidaceae, Genus = Epipactis, Species = gigantea, including synonyms,
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|Epipactis gigantea (giant helleborine)
(= Epipactis gigantea in Flora of the Pacific Northwest)
Glabrous, perennial herbs from short rhizomes, the 1-many stems mostly 3-7 dm. tall.
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.
WA Native Plant Society