Flower:

1 to 3 flowers are clustered at the end of branching stems in the upper part of the plant. Individual flowers are about ¼ inch across, white to pale blue, tubular with 4 sharply pointed lobes and 4 stamens with creamy white to yellow tips. The inside of the tube is hairy. The bracts at the base of the tube are narrowly triangular and about 1/8 inch long. Flower buds are often pink.

Leaves and stem:

Leaves are narrow, to 1¼ inches long and ¼ inch wide, toothless and hairless, with a pointed tip and no leaf stem. Attachment is opposite and there is a small whitish triangular appendage (stipule) on opposite sides the leaf node. The main stem is smooth and 4 sided, with rounded corners.

Notes:

Long-leaf Bluets more often go by Latin name Houstonia longifolia, but the accepted name in Minnesota is Hedyotis longifolia.