Source : Webster's Revised Unabridged Dictionary (1913)

Cruciferous \Cru*cif"er*ous\ (kr?-s?f"?r-?s), a. [L. crux,
   crucis, cross + -ferous: cf. F. crucif?re.]
   1. Bearing a cross.

   2. (Bot.) Of, pertaining to, or resembling, a family of
      plants which have four petals arranged like the arms of a
      cross, as the mustard, radish, turnip, etc.

Source : WordNet®

cruciferous
     adj : of or relating to or belonging to the plant family
           Cruciferae