lambkill

/ˈlæmˌkɪl/
noun
  1. A poisonous shrub (Kalmia angustifolia) found in eastern North America, also called sheep laurel, that can be fatal to livestock if eaten.
    • Farmers watch out for lambkill in their pastures because it is dangerous to sheep.
    • The hiker recognized the pink flowers of lambkill and avoided touching the leaves.
    • Lambkill grows in sandy soil and blooms in early summer.