Klamath weed

noun Klam·ath weed \ˈkla-məth-\

Definition of Klamath weed

  1. :  a European yellow-flowered perennial Saint-John's-wort (Hypericum perforatum) that is naturalized in North America especially in rangelands

Origin and Etymology of klamath weed

Klamath (River)

First Known Use: 1922

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