houstonia c[oe]rulea

Bluets \Blu"ets\, n. [F. bluet, bleuet, dim. of bleu blue. See Blue, a.] (Bot.) A name given to several different species of plants having blue flowers, as the Houstonia c[oe]rulea, the Centaurea cyanus or bluebottle, and the Vaccinium angustifolium. [1913 Webster]