perigonium

  1. Noun.  The sterile parts of a flower; collectively, the sepals and petals (or tepals); the perianth.
  2. Noun.  The modified leaves around the antheridia in a bryophytic plant.
  3. Noun.  (dated) The wall of the sporosac in a hydroid.

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This entry was last updated on RefTopia from its source on 3/20/2012.