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Family = Brassicaceae, Genus = Barbarea, Species = orthoceras, including synonyms,

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Barbarea orthoceras   (American yellow-rocket, American wintercress)  
(= Barbarea orthoceras in Flora of the Pacific Northwest)
Mostly glabrous biennial from a taproot and simple crown, the stems stiff, erect, angled, single but freely-branched, 2-6 dm. tall.
Distribution: Widely distributed throughout Washington; Alaska to the mountains of California, east though the Rockies to the New England states.
Habitat: Meadows, stream banks and moist woods, low to mid-elevations in the mountains.
Origin: Native

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Washington Native Plant Society
WA Native Plant Society