TRAILING BLUET Houstonia micrantha Bluets are so tiny that they can be easily overlooked. They come in some variation in color, but they are predominantly blue. Those that grew along my driveway had yellow stamens. The outer part of the petals was baby blue, but closer to the stamens the blue faded into white then into pink down the throat of the trumpet. These trailing bluets are thinly scattered in some places and in others they form a ground-level blanket through which grass grows. The richer and moister the soil, the thicker the blanket. They measure from 1/4 to 3/8 inch in diameter. Thatâs why most people never see Bluets, even though they are everywhere underfoot.