Mertensia virginica, commonly known as Virginia bluebells are one of my favorite late spring perennials. They self sow unobtrusively around the garden and put on a long show until temperatures start rising in late spring or early summer. In the wild they are typically found in moist woodland meadows, but they tolerate dry shade in my garden. The blue color is most welcome in the garden - it compliments most other flower colors beautifully.