Comparative morphology and biology of the fungi, mycetozoa and bacteria - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1887)

Comparative morphology of Fungi - Dodge, Carroll W. (Carroll William), 1895 -1988 (McGraw-Hill Book Company, Inc, 1928)

Compendium of plant disease and decay fungi in Canada, 1960-1980 - Ginns, J. H. (James Herbert) (Research Branch, Agriculture Canada, 1986)

Conspectus florae groenlandicae - Lange, Joh., 1818 -1898 (I commission hos C.A. Reitzel, 1887)

Conspectus fungorum in Lusatiae Superioris agro Niskiensi crescentium, e methodo Persooniana - Albertini, Johann Baptist von, 1769 -1831 (Sumtibus Kummerianis, 1805)

Conspectus regni vegetabilis : secundum characteres morphologicos praesertim carpicos in classes ordines et familias digesti, adjectis exemplis nominibusque plantarum usui medico technico et oeconomico inservientium = Uebersicht der Classen, Ordnungen und Familien des Gewächsreiches nach morphologischen Grundsätzen, unter besonderer Rücksicht auf den Fruchtbau, mit Angabe von Beispielen und von den in der Medicin, Technik und Oekonomie besonderswichtigen Pflanzen - Martius, Karl Friedrich Philipp von, 1794 -1868 (Joh. Leonhard Schrag, 1835)

Contribución al estudio de la flora de la Sierra de la Ventana - Spegazzini, Cárlos, 1858 -1926 (Ministerio de Obras Públicas de la Provincia de Buenos Aires, Talleres de Publicaciónes del Museo, 1896)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1906)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1901)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1909)

Contributions from the University of Michigan Herbarium - University of Michigan. University Herbarium. (University Herbarium, University of Michigan, 1939)

Contributions to the botany of Vermont - Middlebury College. (Botanical Dept., University of Vermont, 1898)

Contributions to the flora of Iowa; a catalogue of the phaenogamous plants - Arthur, Joseph Charles, 1850 -1942 (Intelligencer Book Print, 1876)

Crittogamia agraria - Comes, O. (Orazio), 1848 -1917 (Marghieri, 1891)

Crittogamia agraria - Comes, O. (Orazio), 1848 -1917 (R. Marghieri di Gius, 1891)

Cryptogamen - Schenck, Heinrich, 1860 -1927 (G. Fischer, 1902)

Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR) - Botanicheskii institut im. V.L. Komarova ([Published for the National Science Foundation, Washington, D.C. by the Israel Program for Scientific Translations, 1970)

Cryptogamie. Mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1981)

Cryptogamie. Mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1985)

Cultivation and diseases of fruit trees in the Maltese Islands - Borg, John, 1873 -1945 (Govt. Print. Off, 1922)

Cultures of Uredineae 1899-1921 - Arthur, Joseph Charles, 1850 -1942 (1921)