Cardamine diphylla

from WordNet (r) 3.0 (2006)

Cardamine diphylla
    n 1: North American herb with pungent scaly or toothed roots
         [syn: {crinkleroot}, {crinkle-root}, {crinkle root},
         {pepper root}, {toothwort}, {Cardamine diphylla}, {Dentaria
         diphylla}]

from The Collaborative International Dictionary of English v.0.48

crinkle root \crinkle root\, crinkleroot \crinkleroot\n.
   a North American herb ({Dentaria diphylla}) with pungent
   scaly or toothed roots; -- called also {toothwort}.

   Syn: pepper root, toothwort, {Cardamine diphylla}, {Dentaria
        diphylla}.
        [WordNet 1.5]