sym·pet·al·ous /(ˌ)sɪmˈpɛtḷəs/
  (a.)合瓣的
  Sym·pet·al·ous a.  Bot. Having the petals united; gamopetalous.
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  sympetalous
       adj : having a corolla composed of partially or wholly fused
             petals forming a corolla shaped like a tube or funnel
             [syn: gamopetalous]