Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 1991)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 1993)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 1998)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2004)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2005)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Germanicae Naturae Curiosorum - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (Friedrich Frommann, 1860)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (Friedrich Frommann, 1954)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (Friedrich Frommann, 1858)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Naturae Curiosorum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (Friedrich Frommann, 1893)

The nursery-book : a complete guide to the multiplication of plants - Bailey, L. H. (Liberty Hyde), 1858 -1954 (Macmillan, 1907)

The nursery-book; a complete guide to the multiplication of plants ... - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan Co, 1914)

The nursery-book : a complete guide to the multiplication and pollination of plants - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Rural Pub. Co, 1892)

The nursery-book : a complete guide to the multiplication of plants - Bailey, L. H. (Liberty Hyde), 1858 -1954 (Macmillan co, 1913)

The nursery-book; a complete guide to the multiplication of plants - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan Company, 1901)

The nursery-manual; a complete guide to the multiplication of plants - Bailey, L. H. (Liberty Hyde), 1858 -1954 (Macmillan, 1920)

De nuttige planten van Nederlandsch-Indië tevens synthetische catalogus der verzamelingen van het Museum voor Economische Botanie te Buitenzorg - Heyne, K. (Ruygrok, 1922)

Nya botaniska notiser ([A. Bonniers Förlag], 1854)

Observationes botanicae : quibus consentiente Ampliss. Philosophor. Ord. Kilon. pro gradu Doctoris Philosophiae nec non LL.AA. Magistri rite obtinendo plantarum cryptogamarum ordinens, genera et species illustrare conatus est - Mohr, Daniel Matthias Heinrich, 1780 -1808 (C. F. Mohr, 1803)

Oceanic birds of South America : a study of species of the related coasts and seas, including the American quadrant of Antarctica, based upon the Brewster-Sanford collection in the American Museum of Natural History - Jaques, Francis Lee, 1887 -1969 (Macmillan Co, 1936)

The octavo nature-printed British ferns : being figures and descriptions of the species and varieties of ferns found in the United Kingdom - Moore, Thomas, 1821 -1887 (Bradbury and Evans, 1859)

Oecology of plants : an introduction to the study of plant-communities - Vahl, M. (Martin), 1749 -1804 (Clarendon Press, 1909)

Oecology of plants : an introduction to the study of plant-communities - Warming, Eugenius, 1841 -1924 (Clarendon Press, 1909)

Oecology of plants; an introduction to the study of plant-communities - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1909)

Oekonomisch-technische Flora der Wetterau - Gärtner, Gottfried, 1754 -1825 (P. H. Guilhauman, 1799)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1865)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1875)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1878)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1896)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1906)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1851)

Official guide to the museums of economic botany. No. 2, Monocotyledons and cryptogams (Printed for H.M. Stationary Off. by Eyre and Spottiswoode, 1895)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1852)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1853)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1912)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1913)

L'Oiseau et la Revue francaise d'ornithologie - Société ornithologique de France. (Société ornithologique de France, 1975)

L'Oiseau et la Revue francaise d'ornithologie - Société ornithologique de France. (Société ornithologique de France, 1978)

Olai Swartz Acad. Imp. nat. cur. rel. sodalis Synopsis filicum : earum genera et species systematice complectens : adjectis lycopodineis, et descriptionibus novarum et rariorum specierum : cum tabulis aeneis quinque - Swartz, Olof, 1760 -1818 (impensis Bibliopolii novi academici, 1806)

On the relation of phyllotaxis to mechanical laws - Church, A. H. (Arthur Harry), 1865 -1937 (Williams & Norgate, 1904)

The Orchadian - Australasian Native Orchid Society (The Society, 1969)

The Orchadian - Australasian Native Orchid Society (The Society, 1963)

The Orchadian - Australasian Native Orchid Society (The Society, 1979)

The Orchadian - Australasian Native Orchid Society (The Society, 1993)

The Orchadian - Australasian Native Orchid Society (The Society, 1994)

The Orchadian - Australasian Native Orchid Society (The Society, 1995)

The Orchadian - Australasian Native Orchid Society (The Society, 1996)

The Orchadian - Australasian Native Orchid Society (The Society, 1997)

The Orchadian - Australasian Native Orchid Society (The Society, 1998)

The Orchadian - Australasian Native Orchid Society (The Society, 2003)

The Orchadian - Australasian Native Orchid Society (The Society, 2010)

The Orchadian - Australasian Native Orchid Society (The Society, 2017)

Orchids and greenhouse plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Julius Roehrs Co, 1916)

Oréades - Instituto de Ciências Biológicas da UFMG. Departamento de Botânica. (Departamento de Botânica, U.F.M.G, 1977)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1898)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1915)

The origin of a land flora : a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan, 1908)

The origin of a land flora : a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan and co., limited, 1908)

The origin of a land flora, a theory based upon the facts of alternation - Bower, F. O. (Frederick Orpen), 1855 -1948 (Macmillan and Co., Ltd, 1908)

Ornamental gardening in Florida - Simpson, Charles Torrey, 1846 -1932 (The author, 1916)

Ornithologia, or, The birds: a poem, in two parts : with an introduction to their natural history; and copious notes - Jennings, James. (Sherwood, Gilbert, and Piper, 1829)

Our native ferns and how to study them; with synoptical descriptions of the North American species - Underwood, Lucien Marcus, 1853 -1907 ([Leader Publishing Co., Printers], 1881)

Our native ferns; or, A history of the British species and their varieties - Lowe, E. J. (Edward Joseph), 1825 -1900 (Groombridge, 1865)

Our South African flora = Ons Suid-Afrikaanse plantegroei - Compton, R. H. (Cape Times, 1900)

An outline of plant geography (The Macmillan company, 1926)

Outline of the flora of Trinidad - Crüger, Herman, 1818 -1864 (Peter and Galpin, 1858)

Outlines of classification and special morphology of plants - Goebel, K. (Karl), 1855 -1932 (Clarendon Press, 1887)

Outlines of classification and special morphology of plants - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1887)