lungwort

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of several Eurasian plants of the genus Pulmonaria, having coiled clusters of blue or purple flowers and formerly used in treating respiratory disorders.
• noun Any of various plants of the genus Mertensia, having drooping clusters of tubular, usually blue flowers.

from The Century Dictionary.

• noun A European boraginaceous plant, Pulmonaria officinalis.
• noun An American plant, Mertensia Virginica, of the same family, at first referred to Pulmonaria. M. maritima is the sea-lungwort.
• noun A lichen, Sticta pulmonaria, somewhat resembling in shape a human lung, and formerly regarded as a lung-remedy: same as hazel-crottles.
• noun The toothwort, Lathræa squamaria, a reputed remedy for diseases of the lungs.

from the GNU version of the Collaborative International Dictionary of English.

• noun 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.
• noun 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.
• noun mullein.
• noun Mertensia maritima, found on the seacoast of Northern Europe and America.
• noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany Any of various European plants, of the genus Pulmonaria, that were once used to treat respiratory disorders