You can call it lungwort, Bethlehem sage or "soldiers and sailors".  You can even call it by its Latin genus name--Pulmonaria.  Whatever you call this useful little perennial plant, you should definitely call it a part of your garden. 

I have had 'Mrs. Moon' (above), a wonderful, time-honored pulmonaria in my garden for years.  For those who are not acquainted with 'Mrs. Moon', I can say that she is quite the charmer.  The leaves are apple green in the spring with splotches of silver.  Later in the season the splotches remain, but the leaf color darkens.  Growing low, 'Mrs. Moon' waits until mid-spring and then bursts into bloom.  The bell-shaped flowers aren't large, but they are spectacular.  Opening pink, they morph over the course of a day or so into a stunning clear blue.  This is not the blue purple of  some flowers that the catalogs describe euphemistically as "blue".  This is true blue, without even a hint of yellow or green or purple.  It is the blue of forget-me-nots, to which pulmonaria is related.

For all her virtues, 'Mrs. Moon' is a shady lady, flourishing in shadowy spots with ample moisture.  And a happy 'Mrs. Moon' is a prolific 'Mrs. Moon'.  I started in my current garden with one plant about eight years ago and now have enough to edge a four-foot long border.  While prolific, 'Mrs. Moon' is too polite to be invasive.  I have no trouble digging out the few extras that pop up in my garden and giving them to grateful friends.

Over the last few years, pulmonaria have grown popular and breeders have produced scores of new cultivars.  I know that I will get around to acquiring some of them, but for now I will content myself with going out in my garden and admiring the original 'Mrs. Moon' and her many successful offspring.