iridaceous
  (a.)鳶尾科的,鳶尾屬的
  Ir·i·da·ceous I·rid·e·ous a.  Bot. Pertaining to, or resembling, a large natural order of endogenous plants (Iridaceæ), which includes the genera Iris, Ixia, Crocus, Gladiolus, and many others.
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  iridaceous
       adj : of or pertaining to or characteristic of plants of the
             family Iridaceae