Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1920)

Novon a journal of botanical nomenclature from the Missouri Botanical Garden - Missouri Botanical Garden. (Missouri Botanical Garden, 2011)

Nuovi annali delle scienze naturali (1841)

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)

The nut culturist : a treatise on the propagation, planting and cultivation of nut-bearing trees and shrubs, adapted to the climate of the United States ... - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd, 1896)

De nuttige planten van Nederlandsch-Indië, tevens synthetische catalogus der verzamelingen van het Museum voor Technische- en Handelsbotanie te Buitenzorg - Heyne, K. (Ruygrok, 1913)

Observationes botanicae quibus plantae Indiae Occidentalis : aliaeque Systematis vegetabilium ed. XIV illustrantur earumque characteres passim emendantur : cum tabulis aeneis - Swartz, Olof, 1760 -1818 (Sumtu Jo. Jacobi Palmii, 1791)

Observationes botanicae :quibus plantae Indiae Occidentalis aliaeque Systematis vegetabilium ed. XIV illustrantur earumque characteres passim emendantur - Swartz, Olof, 1760 -1818 (Sumtu Jo. Jacobi Palmii, 1791)

Observations et Mémoires sur la Physique, sur l'Histoire Naturelle et sur les Arts et Métiers, etc (1788)

Observations on the gestation of some sharks and rays - Alcock, A. (Alfred), 1859 -1933 (Asiatic Society, 1891)

Observer and record of agriculture, Science and art - Peirce, D., (Merrihew and thompson, printers, 1838)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1979)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1993)

Occasional papers of the Museum of Zoology, University of Michigan - University of Michigan. Museum of Zoology. (University of Michigan, 1923)

Odorographia : a natural history of raw materials and drugs used in the perfume industry : intended to serve growers, manufacturers and consumers - Sawer, John Charles (Gurney & Jackson, 1892)

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)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1859)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1876)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1877)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1878)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1887)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1902)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1910)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1920)

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

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1852)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1856)

Official guide to the Botanic Gardens, Dominica : illustrated : with an index of the principal plants - Botanic Gardens (Dominica) (The Garden, 1922)

Official guide to the museums of economic botany No. 1 Dicotyledons - Royal Botanic Gardens, Kew. (Printed for H.M. Stationery Off., by Darling, 1907)

Die offizinellen Pflanzen und Drogen :eine systematische Übersicht über die in sämtlichen Staaten Europas sowie in Japan und den Vereinigten Staaten von Amerika offizinellen Pflanzen und Drogen mit kurzen erläuternden Bemerkungen - Mitlacher, Wilhelm, 1872 -1913 (C. Fromme, 1912)

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

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

Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 1992)

Om anordningarna för de fanerogama växternas befruktning - Axell, Severin, 1842 -1892 (I. Haeggströms boktr, 1869)

Om Galapagos-hoarnes vegetation - Andersson, N. J. (Nils Johan), 1821 -1880 (Norstedt, 1857)

Om Galapagos-öarnes vegetation - Andersson, N. J. (Nils Johan), 1821 -1880 (Berlingska boktr, 1854)

On food. Being lectures delivered at the South Kensington Museum - Lankester, Edwin, 1814 -1874 (R. Hardwicke, 1861)

On the vegetation of the Bermudas - Jones, J. Matthew (John Matthew), 1828 -1888 (s.n, 1874)

Onomatologia botanica completa : oder Vollständiges botanisches Wörterbuch ; worinn nicht nur alle Kunstwörter übersetzt und erklärt, die bekannte [sic] Pflanzen nach der Lehrart des Ritters von Linne beschrieben, ihre verschiedene Namen nach den berühmtesten Schriftstellern angeführt, und eine kleine Lebensgeschichte der vornehmsten Kräuterkundigen beygefügt, sondern auch die Heilskräfte und der Nutzen, den die Arzney-Wissenschaft, Landwirtschaft, Färberey, Vieharzney- und Scheidekunst aus denselben ziehen, aus den besten Schriften dieser Art und aus eigener Erfahrung erläutert werden von einer Gesellschaft erfahrner Pflanzenkundiger - Gmelin, Johann Friedrich, 1748 -1804 ([publisher not identified], 1778)

Onze flora. Beschrijving van de familiën, voornamste geslachten en soorten der in Nederland in het wild groeiende, verwilderde, verbouwde en aangeplante gewassen, alsmede van eenige fraaie en nuttige midden-europeesche planten - Hoffmann, Carl, 1802 -1883 (W.J. Thieme, 1900)

Opmerkingen over eene Buitenzorgsche Kritiek op mijne Exkursionsflora von Java : verweerschrift, op last van den Hoofdinspecteur-Chef van den Dienst van het Boschwezen van Nederlandsch-Indië - Koorders, Sijfert Hendrik, 1863 -1919 (G. Kolff, 1914)

Opuscoli scientifici d'entomologia, di fisica e d'agricoltura - Termeyer, Ramón María, 1737 -1814 (Nella Stamperia del Giornale italico di Carlo Dova, contrada S. Rafaello, num. 998, 1807)

Opuscules de botanique - Clos, Dominique, 1821 -1908 (1859)

Les orchidées : manuel de l'amateur - Bois, D. (Désiré), 1856 -1946 (J.-B. Baillière et fils, 1893)

The organic constituents of plants and vegetable substances and their chemical analysis - Wittstein, Georg Christian, 1810 -1887 (MCarron, Bird & Co, 1878)

Organologisches, systematisches und Arten-Register zu den Tafeln des Handbuch's der botanischen Terminologie - Bischoff, Gottlieb Wilhelm, 1797 -1854 (J.L. Schrag, 1849)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton, 1886)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Hafner Pub. Co, 1890)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Appleton, 1892)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (Paul, Trench, 1886)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton and Co, 1908)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (D. Appleton, 1885)

Origin of cultivated plants - Candolle, Alphonse de, 1806 -1893 (K. Paul, Trench, 1884)

The origin of floral structures through insect and other agencies - Henslow, George, 1835 -1925 (D. Appleton, 1888)

The origin of floral structures through insect and other agencies - Henslow, George, 1835 -1925 (K. Paul, Trench, Trübnerco, 1888)

The origin of floral structures through insect and other agencies - Henslow, George, 1835 -1925 (D. Appleton and Co, 1888)

The origin of floral structures through insects and other agencies - Henslow, George, 1835 -1925 (D. Appleton and company, 1888)

Florist's journal (How and Parsons, 1848)

Ornamental and fruit trees and shrubs. a guide to Southern horticulture ... 1918 catalog - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Royal Palm Nurseries, 1918)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1898)

Outlines of botany for the high school laboratory and classroom (based on Gray's Lessons in botany) - Leavitt, Robert Greenleaf, 1865 - (American Book Co, 1901)

Une page d'histoire de la medecine : la thérapeutique sous les premiers Césars - Lépine, R. (Raphael), 1840 -1919 (F. Alcan, 1890)

Paleobotany and biogeography : a festschrift for Alan Graham in his 80th year - Raven, Peter H (Missouri Botanical Garden, 2014)

The palm tree - Moody, Sophy. (T. Nelson and Sons, Paternoster Row; Edinburgh, and New York, 1864)

The Palm tribes and their varieties (Religious Tract Society, 1852)

[Pamphlets on agriculture in Guam] (s.n, 1905)

Pamphlets on forestry in the Philippine Islands (1900)

Pamphlets on silviculture (1899)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1970)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1980)

The Pan-Pacific entomologist - Van Duzee, Edward P. (Edward Payson), 1861 -1940 (Pacific Coast Entomological Society, 1989)

The paradisus londinensis:or coloured figures of plants cultivated in the vicinity of the metropolis - Salisbury, R. A. (Richard Anthony), 1761 -1829 (Printed by D.N. Shury, and published by William Hooker, 1805)

Park and cemetery and landscape gardening - Haight, R. J. (Rufus J.) (R.J. Haight, 1901)

Parte práctica de botánica del caballero Cárlos Linneo, que comprehende las clases, órdenes, géneros, especies y variedades de las plantas, con sus caracteres genéricos y especificos, sinónimos mas selectos, nombres triviales, lugares donde nacen, y propriedades - Linné, Carl von, 1707 -1778 (En la Imprenta Real, 1784)

Pathological plant anatomy - Küster, E. (Ernst), 1874 -1953 (1913)

Pathologische Pflanzenanatomie. In ihren Grundzügen - Küster, E. (Ernst), 1874 -1953 (G. Fischer, 1916)

Patterson's numbered check-list of North American plants north of Mexico - Patterson, Harry N. (Harry Norton), 1853 -1919 (Patterson, 1892)

Paxton's Botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms. New ed. including all the new plants up to the present year - Paxton, Joseph, Sir, 1803 -1865 (Bradbury, Evans, & co, 1868)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1837)

Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1849)

Personal narrative of travels to the equinoctial regions of the New continent during the years 1799-1804 - Humboldt, Alexander von, 1769 -1859 (G. Bell, 1877)