Lungwort

n. (Bot.) (a) An herb of the genus Pulmonaria (Pulmonaria officinalis), of Europe; -- so called because the spotted appearance of the leaves resembles that of a diseased lung. (b) Any plant of the genus Mertensia (esp. Mertensia Virginica and Mertensia Sibirica), plants nearly related to Pulmonaria. The American lungwort is Mertensia Virginica, Virginia cowslip. Gray. [ 1913 Webster ]

Cow's lungwort mullein. --
Sea lungwort, Mertensia maritima, found on the seacoast of Northern Europe and America. --
Tree lungwort, a lichen (Sticta pulmonacea) growing on trees and rocks. The thallus is lacunose, and in appearance somewhat resembles the lungs, for diseases of which it was once thought a remedy. [ 1913 Webster ]