Sticta pulmonaria, Hook, Engl. Fl.; St. pulmonacea, Ach. Syn. p. 233; Lichen pulmonarius, Linn.; Muscus pulmonaria, Dale, Pharm.; Tree Lungwort, Oak-Lungs.—This lichen has been analyzed by John [Gmelin, Handb. d. th. Chem. Bd. ii. S. 1351, 1829.], who found it to contain resinous chlorophylle, 2; bitter extractive, 8; lichen starch, 7; insoluble matters, 80; salts, &c. 3. Its virtues are dependent on the bitter and amylaceous matter, and are similar, but inferior, to those of Iceland moss. It has been esteemed as a pectoral in pulmonary affections; as an astringent in internal hemorrhages, and as a remedy for jaundice. It has been given in doses of a drachm, in the form of powder or decoction. In Siberia, where the plant seems to be more bitter than in this country, it is employed as a substitute for hops in brewing [Murray, App. Medicam. vol. v. p. 520.].