jointed charlock

from WordNet (r) 3.0 (2006)

jointed charlock
    n 1: Eurasian weed having yellow or mauve or white flowers and
         podlike fruits [syn: {jointed charlock}, {wild radish},
         {wild rape}, {runch}, {Raphanus raphanistrum}]

from The Collaborative International Dictionary of English v.0.48

Charlock \Char"lock\, n. [AS. cerlic; the latter part perh. fr.
   AS. le['a]c leek. Cf. {Hemlock}.] (Bot.)
   A cruciferous plant ({Brassica sinapistrum}) with yellow
   flowers; wild mustard. It is troublesome in grain fields.
   Called also {chardock}, {chardlock}, {chedlock}, and
   {kedlock}.
   [1913 Webster]

   {Jointed charlock}, {White charlock}, a troublesome weed
      ({Raphanus Raphanistrum}) with straw-colored, whitish, or
      purplish flowers, and jointed pods: wild radish.
      [1913 Webster]