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Dipsacus fullonum
Still wondering what this weird plant is...
Three Dipsacus sp. are documented for Oregon (USDA Plant Database). You'll need information on the basal leaves to identify to species.
Dipsacus laciniatus (Cutleaf Teasel): http://www.missouriplants.com/Whiteopp/D...
Dipsacus fullonum (Common or Fuller's Teasel): https://www.uwgb.edu/biodiversity/herbar...
Dipsacus sativus: http://www.hear.org/pier/imagepages/thum...