Checklist of the vascular plants of Steamboat Mountain Research Natural Area - Pacific Northwest Forest; Range Experiment Station (Portland, Or.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1981)

Checklist of the vascular plants of the intermountain region - Intermountain Forest; Range Experiment Station (Ogden, Utah) (Intermountain Forest & Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1966)

Checklist of vascular plants of the Ottawa-Hull region, Canada = Liste des plantes vasculaires de la râegion d'Ottawa-Hull, Canada - Gillett, John M. (John Montague), 1918 -2014 (National Museum of Natural Sciences, National Museums of Canada, 1978)

Checklist of vascular plants of the Southern Rocky Mountain Region - Snow, Neil Wilton (2009)

Checklists for the CORINE Biotopes Programme and its application in the PHARE countries of Central and East Europe: including comparisons with relevant conventions and agreements on the conservation of European species and habitats - WCMC (EC, 1994)

Chloris andina : essai d'une flore de la région alpine des Cordillères de l'Amérique du Sud - Weddell, H. A. (Hugh Algernon),‏ ‎ 1819 -1877 (P. Bertrand, 1857)

Choice rock plants, rare alpines : spring 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rainbow Nursery Co., Inc, 1929)

Circle West vegetation monitoring study - Montana. Energy Division. (Energy Division, Montana Dept. of Natural Resources and Conservation, 1982)

Class book of botany : being an introduction to the study of the vegetable kingdom - Balfour, John Hutton, 1808 -1884 (Adam and Charles Black, 1854)

The Classification of a botanical library - Trelease, William, 1857 -1945 (1900)

The classification of flowering plants - Rendle, A. B. (Alfred Barton), 1865 -1938 (University press, 1904)

The classification of flowering plants - Rendle, A. B. (Alfred Barton), 1865 -1938 (Univ. Press, 1904)

Coefficient of conservatism rankings for the flora of Montana. Part III - Montana Natural Heritage Program. (Montana Natural Heritage Program, 2017)

Coefficient of conservatism rankings for the flora of Montana. report to the Montana Department of Environmental Quality, Helena, Montana. Part I - Montana. Department of Environmental Quality (Montana Natural Heritage Program, 2015)

Coefficient of conservatism rankings for the flora of Montana. Part II - Montana. Department of Environmental Quality (Montana Natural Heritage Program, 2016)

Coffee : a monograph of the economic species of the genus Coffea L - Cheney, Ralph Holt, 1896 - (New York University Press, 1925)

A college text-book of botany : being an enlargement of the author's "Elementary botany," - Atkinson, George Francis, 1854 -1918 (Henry Holt and Company, 1905)

A college text-book of Botany, being an enlargement of the author's "Elementary Botany." - Atkinson, George Francis, 1854 -1918 (Holt, 1905)

A college text-book of botany; being an enlargement of the author's "Elementary botany." - Atkinson, George Francis, 1854 -1918 (Holt, 1908)

The commonly occuring wild plants of Canada a flora for the use of beginners - Spotton, H. B. (Henry Byron), 1844 -1933 (W.J. Gage, 1887)

Comparative external pollen ultrastructure of the Araceae and putatively related taxa - Grayum, Michael Howard, 1949 - (Missouri Botanical Garden, 1992)

A comparison of island and mainland pollination ecology - Spears, Edwin Eugene, 1953 - (1983)

Compendio della flora italiana; ossia, Manuale per la determinazione delle piante che trovansi selvatiche od inselvatichite nell'Italia e nelle isole adiacenti - Arcangeli, G. (Giovanni), 1840 -1921 (E. Loescher, 1882)

Compendium florae Germaniae. Sectio I, Plantae phanerogamicae seu vasculosae - Bluff, Matthias Joseph, 1805 -1837 (J.L. Schrag, 1836)

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

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Compositae of southern California - Hall, Harvey Monroe, 1874 -1932 (The University Press, 1907)

Composition and ecological significance of shrublands/grasslands immediately west of Helena Regional Airport - Montana Natural Heritage Program. ([Montana Natural Heritage Program], 1992)

Der Conservator oder praktische Anleitung, Naturalien aller Reiche zu sammeln, zu conserviren und für wissenschaftliche Zwecke, wie auch zum Vergnügen aufzustellen : Ein Hilfsbuch zum Selbstunterricht für Lehrer, Landprediger, Hauslehrer und alle Diejenigen, welche Naturaliensammlungen zweckmässig, ohne unnöthigen Zeit- und Kosten-Aufwand, anlegen wollen : nach eigenen Erfahrungen bearbeitet und mit Tabellen zur leichteren Bestimmung der Mineralien und Pflanzen [etc.] versehen - Streubel, A. V. (August Vollrath) (Verlag von Ferdinand Rubach, 1845)

Conspectul florei României. Plantele vasculare indigene si cele naturalizate ce se gasesc pe teritoriul României, considerate subt punctul de vedere sistematic si geografic - Grecescu, Dimitrie, 1841 -1910 (Tip. Dreptatea, 1898)

Conspectus florae Graecae - Halácsy, Eugen v., 1842 -1913 (Sumptibus Guilelmi Engelmann, 1902)

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

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)

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Contributions from the Gray Herbarium of Harvard University - Harvard University. Gray Herbarium. (Harvard University, 1947)

Contributions from the Gray Herbarium of Harvard University - Harvard University. Gray Herbarium. (Harvard University, 1949)

Contributions from the Gray Herbarium of Harvard University - Harvard University. Gray Herbarium. (Harvard University, 1954)

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Contributions from the New South Wales National Herbarium. Flora series (Govt. Pr, 1962)

Contributions from the New South Wales National Herbarium. Flora series (Govt. Pr, 1966)

Contributions from the New South Wales National Herbarium. Flora series (Govt. Pr, 1967)

Contributions from the New South Wales National Herbarium. Flora series (Govt. Pr, 1963)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1902)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1907)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1912)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1918)

Contributions from the New York Botanical Garden - New York Botanical Garden (The Garden, 1921)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1897)

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, 1900)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1906)

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

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1912)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1913)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1915)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1919)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1920)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1925)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1928)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1943)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 1968)

Contributions from the United States National Herbarium - United States. National Herbarium. (Smithsonian Institution Press, 2003)