A North American evergreen shrub (genus Lyonia) with small white flowers and poisonous foliage; also called stagger bush because livestock eating it would stumble.
Compound of 'fetter' (chain, restraint) plus 'bush' (shrub). Named for the plant's toxic properties that would cause animals to become incapacitated or 'fettered' in movement due to poisoning.
Fetterbush gets its name because it literally fetters—animals that eat it become uncoordinated and stagger around as if bound by chains; it's a plant name that describes a plant's dangerous effect.
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