The flowering stems have small leaves and flowers are in clustered cymes. Most plants have funnel shaped flowers with somewhat flaring mouths and small notches on the petal apexes. The petals are fused together into one corolla which is an identifing characteristic of the family Boranginaceae. Flower colors can be red, blue, white or violet. Flowers close at night and open again in the morning.
New leaves begin to grow a few days to weeks after the first flowers open.
The first flowers may open when stems are only 1 inch out of the ground and more flowers open over the next few weeks as the stems reach their full height, which is generally around 10-18 inches for most forms. Roots are white and thickly fibrous showing the typical size and structur for plants adapted for damp and wet soils. Pulmonaria should be planted in a somewhat shady area, like under deciduous trees. They like spring sunshine and morning light. They do not like hot afternoon heat- wilting under the intense heat and light of the summer sun.