Any plant considered poisonous or deadly; a folk or folk-botanical term for toxic plants.
From 'death' plus 'weed' (Old English weod). Descriptive folk term for plants known to be lethal, similar to 'deathroot,' used by herbalists and healers to warn of danger.
In a world without warning labels, 'deathweed' in a plant name was literally the product information you needed—the plant itself announced its danger through its folk name.
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