klammath weed


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Noun1.klammath weed - yellow-flowered perennial common in fields and waste places but a weed in rangelandsklammath weed - yellow-flowered perennial common in fields and waste places but a weed in rangelands
St John's wort - any of numerous plants of the genus Hypericum having yellow flowers and transparently dotted leaves; traditionally gathered on St John's eve to ward off evil