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.
any of various other plants having blue flowers.
Origin of bluet
1400–50;late Middle Englishblewet, blewed, variant of Middle Englishbloweth, blowed (see blue, blae); suffix perhaps Old English-et, as in thicket