dock-cress

from The Collaborative International Dictionary of English v.0.48

Nipplewort \Nip"ple*wort`\ (n[i^]p"p'l*w[^u]rt`), n. (Bot.)
   A yellow-flowered composite herb ({Lampsana communis}),
   formerly used as an external application to the nipples of
   women; -- called also {dock-cress}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Dock-cress \Dock"-cress`\, n. (Bot.)
   Nipplewort.
   [1913 Webster]