Any of a group of plants formed by a symbiotic combination of a fungus with an algae or CYANOBACTERIA, and sometimes both. The fungal component makes up the bulk of the lichen and forms the basis for its name.
    

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Fifteen different species of lichen. Coloured etching by J. Pass, c. 1813.

Twelve different species of lichen. Coloured etching by J. Pass, c. 1813.

Two lichens with whole and sectioned thallus. Coloured engraving after J. Sowerby, 1796.

A group of lower plants, including mosses, liverworts and lichens. Colour nature print by A. Auer, c. 1853.

Four types of lichen (Parmelia species). Coloured engraving by J. Pass, c. 1821.

Morphologie und Physiologie der Pilze, Flechten und Myxomyceten / A. de Bary ; mit 101 Holzschitten und einer Kuppertafel.

Observations on pulmonary consumption, or, An essay on the Lichen Islandicus, considered both as an aliment and a medicine in that disorder / by J.B. Regnault, M.D.

A handy-book to the collection and preparation of freshwater and marine algae, diatoms, desmids, fungi, lichens, mosses and other of the lower crytogamia with instructions for the formation of an herbarium / translated and edited by the Rev. W.W. Spicer.

A certain cure for the bite of a mad dog / R. M.

A popular history of British lichens : comprising an account of their structure, reproduction, uses, distribution and classification / by W. Lauder Lindsay.

Lichens

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Catalogue

Morphologie und Physiologie der Pilze, Flechten und Myxomyceten / A. de Bary ; mit 101 Holzschitten und einer Kuppertafel.

Observations on pulmonary consumption, or, An essay on the Lichen Islandicus, considered both as an aliment and a medicine in that disorder / by J.B. Regnault, M.D.

A handy-book to the collection and preparation of freshwater and marine algae, diatoms, desmids, fungi, lichens, mosses and other of the lower crytogamia with instructions for the formation of an herbarium / translated and edited by the Rev. W.W. Spicer.

A certain cure for the bite of a mad dog / R. M.

A popular history of British lichens : comprising an account of their structure, reproduction, uses, distribution and classification / by W. Lauder Lindsay.