Nuova flora analitica d'Italia, contenente la descrizione delle piante vascolari indigene inselvatichite e largamente coltivate in Italia - Fiori, Adriano 1865 -1950 (Tipografia di M. Ricci, 1923)

Nuovi annali delle scienze naturali (1853)

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

Nutrition and foraging ecology of the desert tortoise : FY 1990 annual report - DeFalco, Lesley A. (U.S. Fish and Wildlife Service, National Ecology Research Center, 1991)

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

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1880)

Nzayilu N'ti : Guide des arbres et arbustes de la région de Kinshasa - Brazzaville - Robbrecht, Elmar (1993)

Observations on the Coccidae of Egypt - Hall, W. J. (Wilfrid John), 1892 -1965 (Government Press, 1922)

Observations on the flowering plants, ferns and fern allies growing wild in Marquette County, Michigan, in 1916 and 1917, especially in the vicinity of the Huron Mountain Club - University of Michigan. Museum of Zoology. (Published by the University, 1918)

Observations on the Neilgherries; including an account of their topography, climate, soil, & productions, and of the effects of the climate on the European constitution ... - Baikie, Robert. (Printed at the Baptist mission press, 1834)

Observations sur la végétation de l'ile de Sitcha - Bongard, H. G. (Heinrich Gustav), 1786 -1839 (s.n, 1833)

Occasional papers - San Diego Society of Natural History. (San Diego Society of Natural History, 1949)

Occasional Papers of the Bernice Pauahi Bishop Museum of Polynesian Ethnology and Natural History - Bernice Pauahi Bishop Museum. (Bishop Museum Press, 1906)

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

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, 1862)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1873)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1882)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1883)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1886)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1887)

Oesterreichische botanische Zeitschrift (A. Skofitz)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1888)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1889)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1890)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1891)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1893)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1895)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1896)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1897)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1898)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1899)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1900)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1902)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1903)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1906)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1908)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1909)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1910)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1911)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1912)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1913)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1914)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1918)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1919)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1920)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1921)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1923)

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

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

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1853)

Oesterreichisches botanisches Wochenblatt ([L.W. Seidel], 1854)

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 Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1905)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1901)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2015)

Ohio Biological Survey notes - Ohio Biological Survey. (Ohio Biological Survey, 2017)

The Ohio journal of science - Ohio Academy of Science. (Ohio Academy of Science, 1909)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1911)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1910)

Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 2017)

On buds and stipules - Lubbock, John, Sir, 1834 -1913 (K. Paul, Trench, Trübner & Co., ltd, 1899)

On the fauna and flora of the west of Scotland. Meeting at Glasgow, September, 1876 - British Association for the Advancement of Science. (Blackie, 1876)

On the geology and natural history of the upper Missouri :Being the substance of a report made to Lieut. G.K. Warren, T.E. U.S.A - Hayden, F. V. (Ferdinand Vandeveer), 1829 -1887 (Printed by C. Sherman & son, 1862)

On the naturalised weeds and other plants in South Australia - Schomburgk, Richard, 1811 -1891 (E. Spiller, Acting Govt. Printer, 1879)

On Turritopsis nutricula (McCrady) - Brooks, William Keith, 1848 -1908 (1907)

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)

Oregon flora newsletter - Oregon State University. Department of Botany; Plant Pathology. (Oregon Flora Project, Dept. of Botany & Plant Pathology, Oregon State University, 1997)

Oregon flora newsletter - Oregon State University. Department of Botany; Plant Pathology. (Oregon Flora Project, Dept. of Botany & Plant Pathology, Oregon State University, 2000)

Oregon flora newsletter - Oregon State University. Department of Botany; Plant Pathology. (Oregon Flora Project, Dept. of Botany & Plant Pathology, Oregon State University, 2007)

Organography of plants, especially of the archegoniatae and spermaphyta - Goebel, K. (Karl), 1855 -1932 (Clar. Press, 1900)

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

The origin of the British flora - Reid, Clement, 1853 -1916 (Dulau, 1899)

Florist's journal (How and Parsons, 1846)

The ornamental trees of Hawaii - Rock, Joseph F. (Joseph Francis), 1884 -1962 (1917)

Our early wild flowers a study of the herbaceous plants blooming in early spring in the northern states and Canada - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (McClelland, Goodchild & Stewart, 1916)

Our early wild flowers : a study of the herbaceous plants blooming in early spring in the northern states - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (Scribner, 1916)

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

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

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