Source : Webster's Revised Unabridged Dictionary (1913)

Staggerbush \Stag"ger*bush`\, n. (Bot.)
   An American shrub ({Andromeda Mariana}) having clusters of
   nodding white flowers. It grows in low, sandy places, and is
   said to poison lambs and calves. --Gray.

Source : WordNet®

staggerbush
     n : deciduous shrub of coastal plain of the eastern United
         States having nodding pinkish-white flowers; poisonous to
         stock [syn: {stagger bush}, {Lyonia mariana}]