shellflower

English

Etymology

shell +‎ flower

Pistia stratioides
Moluccella laevis

Noun

shellflower (plural shellflowers)

  1. A floating aquatic plant, Pistia stratiotes, with green rosettes of leaves and inconspicuous flowers.
    Synonyms: water lettuce, water cabbage
  2. A plant in the mint family grown for its distinctive circular green calyxes.
    Synonyms: bells of Ireland, Molucca balm
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