perianth ['perɪˌænθ]

例句:

• Outer perianth segments dark brownish - red, short lanceolate, with whitish edge.
  外花被片段为深棕红色, 短披针形, 带白色边缘.
  
• The outer series of perianth in the irises and related plants.
  蝴蝶花或相关植物外层常垂的花瓣.
  
• Located below the perianth and other floral parts. Used of an ovary.
  下位的位于花被和其它部分以下的.用于指子房.