Definition: erysimum allionii

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Source: WordNet (r) 1.7 

Erysimum allionii
     n : showy erect biennial or short-lived perennial cultivated for
         its terminal racemes of orange-yellow flowers; sometimes
         placed in genus Cheiranthus [syn: Siberian wall flower,
          Erysimum allionii, Cheiranthus allionii]