al·fal·fa /ælˈfælfə/
  紫花苜蓿
  Al·fal·fa n.  Bot. The lucern (Medicago sativa), a leguminous plant having bluish purple cloverlike flowers, and cultivated for fodder; -- so called in California, Texas, etc.
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  alfalfa
       n 1: important European leguminous forage plant with trifoliate
            leaves and blue-violet flowers grown widely as a pasture
            and hay crop [syn: lucerne, Medicago sativa]
       2: leguminous plant grown for hay or forage