1. Usually bluets. Also called innocence, Quaker-ladies. any of several North American plants of the genus Houstonia (or Hedyotis), of the madder family, especially H. caerulea, a low-growing plant having four-petaled blue and white flowers.
  2. any of various other plants having blue flowers.


  1. a North American rubiaceous plant, Houstonia caerulea, with small four-petalled blue flowers

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