A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum - British Museum (Natural History). Department of Botany. (Printed by Order of the Trustees, 1911)

A monograph of the British lichens; a descriptive catalogue of the species in the Department of Botany, British Museum - British Museum (Natural History). Department of Botany. (Trustees of the British Museum, 1918)

A monograph of the Norwegian Physciaceae - Lynge, Bernt, 1884 -1942 (In commission at J. Dybwad, 1916)

Monthly microscopical journal: transactions of the Royal Microscopical Society, and record of histological research at home and abroad - Royal Microscopical Society (Great Britain) (R. Hardwicke, 1870)

Monthly microscopical journal: transactions of the Royal Microscopical Society, and record of histological research at home and abroad - Royal Microscopical Society (Great Britain) (R. Hardwicke, 1874)

Morphologie und biologie der algen - Oltmanns, Friedrich, 1860 -1945 (G. Fischer, 1904)

Morphologie und Biologie der Algen - Oltmanns, Friedrich, 1860 -1945 (Fischer, 1922)

Morphologie und Biologie der Algen - Oltmanns, Friedrich, 1860 -1945 (G. Fischer, 1922)

Morphologie und biologie der algen - Oltmanns, Friedrich, 1860 -1945 (G. Fischer, 1905)

Morphologie und Physiologie der Pilze, Flechten und Myxomyceten - Bary, A. de (Anton), 1831 -1888 (W. Engelmann, 1866)

Morphology and taxonomy of fungi - Bessey, Ernst Athearn, 1877 -1957 (Blakiston, 1950)

Moscosoa : contribuciones científicas del Jardín Botánico Nacional "Dr. Rafael M. Moscoso" - Jardín Botánico Nacional "Dr. Rafael M. Moscoso." (El Jardín, 2001)

Mosses and lichens : a popular guide to the identification and study of our commoner mosses and lichens, their uses, and methods of preserving - Marshall, Nina L. (Doubleday, Page & company, 1907)

Mosses and lichens collected in the former Danish West Indies - Børgesen, Frederik, 1866 -1956 (Hagerup, 1918)

Mosses and lichens; a popular guide to the identification and study of our commoner mosses and lichens, their uses, and methods of preserving - Marshall, Nina L. (Doubleday, Page, 1907)

Mosses and lichens : a popular guide to the identification and study of our commoner mosses and lichens, their uses, and methods of preserving - Marshall, Nina L. (Doubleday, Page, 1920)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1959)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1972)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1974)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1975)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1981)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1982)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1983)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1987)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1991)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 1999)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2000)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2008)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2011)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2013)

Muelleria: An Australian Journal of Botany - Royal Botanic Gardens (Vic.) (National Herbarium of Victoria, 2023)

Museum naturalium Academiae upsaliensis cujus partem primam [-XXXIII, ultimam] - Thunberg, Carl Peter, 1743 -1828 (Typis Edmannianis, 1813)

Museum naturalium Academiae upsaliensis cujus partem primam [-XXXIII, ultimam] - Thunberg, Carl Peter, 1743 -1828 (Typis Edmannianis, 1816)

My garden, its plan and culture together with a general description of its geology, botany, and natural history - Smee, Alfred, 1818 -1877 (Bell and Daldy, 1872)

Mycologia - New York Botanical Garden (New York Botanical Garden, 1909)

Mycologia - New York Botanical Garden (New York Botanical Garden, 1911)