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

Oesterreichische botanische Zeitschrift (A. Skofitz, 1860)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1862)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1865)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1866)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1868)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1877)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1878)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1886)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1889)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1890)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1897)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1902)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1905)

Oesterreichische botanische Zeitschrift (A. Skofitz, 1912)

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

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

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)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1872)

Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1891)

The Ohio naturalist - Ohio Academy of Science. (Biological Club of the Ohio State University, 1900)

Okens Lehrbuch der Naturgeschichte - Oken, Lorenz, 1779 -1851 (Bei Carl Heinrich Reclam, 1815)

Old time gardens - Earle, Alice Morse, 1851 -1911 (The Macmillan company, 1901)

Old time gardens : newly set forth - Earle, Alice Morse, 1851 -1911 (The Macmillan Company, 1901)

Old time gardens, newly set forth - Earle, Alice Morse, 1851 -1911 (Macmillan, 1922)

Old time gardens, newly set forth - Earle, Alice Morse, 1851 -1911 (The Macmillan Company, 1901)

Olds' golden jubilee seed book, 1937, "tells the truth" : field & garden seeds, bulbs, plants, seed potatoes, garden tools, poultry supplies - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.L. Olds Seed Co, 1937)

Olds seed book, 1936, 49th year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (L.L. Olds Seed Co, 1936)

Om vegetationen paa de Dansk-Vestindiske er - Børgesen, Frederik, 1866 -1956 (E. Bojesen, 1898)

On the birds of the islands of Aruba, Curaçao, and Bonaire - Hartert, Ernst, 1859 -1933 (s.n, 1893)

On the crustacea and echinodermata of the Pacific shores of North America - Stimpson, William, 1832 -1872 (Boston Society of Natural History, 1857)

On the deep and shallow water marine fauna of the Kerguelen Region of the Great Southern Ocean - Murray, John, Sir, 1841 -1914 (Robert Grant & Son, 1896)

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

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

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1895)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1897)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1898)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1899)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (Frank H. Lattin, 1900)

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

Orchard and farm (Calkins Newspaper Syndicate, 1922)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1914)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1915)

Orcutt Seed and Plant Company : trade price list 1889-1890 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Orcutt Seed and Plant Company, 1889)

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

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

Organic materia medica : including the standard remedies of the leading pharmacopoeas as well as those articles of the newer materia medica ... and of the preparations made therefrom by Parke, Davis & Co. ... - Parke, Davis & Company ([s.n.], 1888)

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, 1913)

Organography of plants, especially of the Archegoniata and Spermaphyta - Balfour, Isaac Bayley, 1853 -1922 (Clarendon press, 1900)

Oriental text book and language of flowers - Adams, H. G. (Henry Gardiner), 1811 or 12 -1881 (Dean & Son, 1850)

Oriental text book and language of flowers - Adams, H. G. (Henry Gardiner), 1811 or 12 -1881 (Dean & Son, 1851)

Florist's journal (How and Parsons, 1840)

Florist's journal (How and Parsons, 1842)

Florist's journal (How and Parsons, 1844)

Florist's journal (How and Parsons, 1846)

Florist's journal (How and Parsons, 1847)

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)

Ornamental cacti : their culture and decorative value - Thomson, Charles Henry, 1870 -1931 (U.S. G.P.O, 1912)

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

Ornamental gardening in Florida, radio series - 1933-34 - Cooperative extension work in agriculture; home economics. (Cooperative extension work in agriculture and home economics, 1933)

Ornamental Nursery, Saint James City, Florida - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ornamental Nursery, 1934)

Ornamental nursery stock, broad leaved evergreen trees and plants, deciduous trees and shrubs, conifers, roses, bulbs, perennial and Alpine plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Beverly Hills Nurseries, 1929)

Ornamental Nursery, the home of the agave, St. James City, Florida : beautify your home, beautify your grounds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ornamental Nursery, 1937)

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

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1904)

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)

O.S.U. naturalist - Ohio State University. Biological Club. (Biological Club of Ohio State University, 1901)

Otia conchologica : descriptions of shells and mollusks, from 1839 to 1862 - Gould, Augustus A. (Augustus Addison), 1805 -1866 (Gould and Lincoln, 1862)

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

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1913)