Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1930)

Pugillus plantarum imprimis Hispanicarum, quas in itinere 1851-52 - Lange, Johan, 1818 -1898 (B. Luno, 1860)

Purdy's bulbs for fall planting - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl Purdy, 1909)

Quarterly journal of microscopical science (J. and A. Churchill [etc.], 1870)

Quarterly Magazine of the High Wycombe Natural History Society - High Wycombe Natural History Society. (1866)

Rambles in search of wild flowers, and how to distinguish them - Plues, Margaret (Journal of horticulture and cottage gardener, 1864)

Rambles of a naturalist round Folkestone : with occasional papers on the fauna and flora of the district, to which are added lists of plants, lepidoptera, birds, and land and freshwater shells - Ullyett, Henry. (J. English, 1880)

Rawson's bulb hand book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.W. Rawson & Co, 1908)

Rawson's bulb hand book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.W. Rawson & Co, 1909)

Révision des champignons, tant supérieurs qu'inférieurs trouvés jusqu'à ce jour dans les Pays-Bas - Oudemans, C. A. J. A. (Cornelis Antoon Jan Abraham), 1825 -1906 (J. Mller, 1892)

Reading Naturalist. Reading - Reading Natural History Society. (1963)

Reading Naturalist. Reading - Reading Natural History Society. (1966)

Reading Naturalist. Reading - Reading Natural History Society. (1974)

Reading Naturalist. Reading - Reading Natural History Society. (1976)

Reading Naturalist. Reading - Reading Natural History Society. (1977)

Reading Naturalist. Reading - Reading Natural History Society. (1978)

Reading Naturalist. Reading - Reading Natural History Society. (1980)

Reading Naturalist. Reading - Reading Natural History Society. (1982)

Reading Naturalist. Reading - Reading Natural History Society. (1984)

Reading Naturalist. Reading - Reading Natural History Society. (1986)

Reading Naturalist. Reading - Reading Natural History Society. (1991)

Reading Naturalist. Reading - Reading Natural History Society. (1993)

Reading Naturalist. Reading - Reading Natural History Society. (2008)

Recherches sur la géographie botanique du Lyonnais - Magnin, Antoine, 1848 -1926 (J.-B. Baillière, 1879)

Recherches sur le pédoncule et la fleur des Liliacées - Allorge, V. (Valentine) 1888 -1977 (Imprimerie Nemourienne, 1920)

Recreative Science (1860)

Recueil de l'Institut botanique (Université de Bruxelles) - Institut botanique Léo Errera. (Henri Lamertin, 1902)

Recueil des travaux botaniques néerlandais - Koninklijke Nederlandse Botanische Vereniging. (Société botanique néerlandaise, 1907)

Recueil des travaux botaniques néerlandais - Koninklijke Nederlandse Botanische Vereniging. (Société botanique néerlandaise, 1904)

Recueil des travaux botaniques néerlandais - Koninklijke Nederlandse Botanische Vereniging. (Société botanique néerlandaise, 1923)

Reise in Brasilien : auf Befehl Sr. Majestät Maximilian Joseph I., Königs von Baiern, in den Jahren 1817 bis 1820 gemacht und beschrieben - Spix, Johann Baptist von, 1781 -1826 (M. Lindauer, 1823)

Reise nach Ostindien und China - Ekeberg, Carl Gustav, 1716 -1784 (verlegts Johann Christian Koppe, 1765)

Reliquiæ Baldwinianæ: selections from the correspondence of the late William Baldwin ... with occasional notes, and a short biographical memoir - Muhlenberg, Henry, 1753 -1815 (Kimber and Sharpless, 1843)

Reliquiae Formánekianae : enumeratio critica plantarum vascularium, quas itineribus in Haemo Peninsula et Asia Minore (Bithynia) factis collegit Dr. Ed. Formánek - Vandas, Karel, 1861 -1923 (Comitiorum Marchionatus Moraviae, 1909)

Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1898)

Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1911)

Repertorium commentationum a societatibus litterariis editarum - Reuss, Jeremias David, 1750 -1837 (apud Henricum Dieterich, 1802)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1890)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1909)

Report / Botanical Exchange Club and Society of the British Isles - Botanical Exchange Club; Society of the British Isles. (1901)

Report / Botanical Exchange Club and Society of the British Isles - Botanical Exchange Club; Society of the British Isles. (1913)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1917)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1920)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1923)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1928)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1938)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1945)

Report of a geological survey of Wisconsin, Iowa, and Minnesota;and incidentally of a portion of Nebraska Territory - United States. General Land Office (Lippincott, Grambo, 1852)

Report of a geological survey of Wisconsin, Iowa, and Minnesota : and incidentally of a portion of Nebraska Territory : made under instructions from the United States Treasury Department - United States. General Land Office. (Lippincott, Grambo & Co, 1852)

Report of the Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, Office of the Regents, 1868)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1845)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1890)

Report of the East Kent Natural History Society - East Kent Natural History Society. (1858)

Report of the flora of Westchester County - Bolton, Robert, 1814 -1877 (Roper & Burdge, 1880)

Report of the Folkestone Natural History Society - Folkestone Natural History Society. (1955)

Report of the Missouri State Horticultural Society for the year - Missouri State Horticultural Society. (The Society, 1886)

Report of the Proceedings of the Society / Cheltenham College Natural History Society - Cheltenham College Natural History Society. (1889)

Report of the Proceedings of the Society / Cheltenham College Natural History Society - Cheltenham College Natural History Society. (1895)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1901)

Reports on the herbaceous plants and on the quadrupeds of Massachusetts - Dewey, Chester, 1784 -1867 (Folsom, Wells, and Thurston, 1840)

Researches about atmospheric phenomena - Forster, T. (Thomas), 1789 -1860 (Printed for Harding, Mavor, and Lepard, 1823)

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)

Retail catalogue of American plants, shrubs and trees - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. F. Bassett & Son, 1898)

Retail trade list. Spring, 1917 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Eastern Nurseries, 1917)

Revised checklist of New York State plants - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1997)

Revision of the North American Liliaceae. Descriptions of some new species of North American plants - Watson, Sereno, 1826 -1892 (1879)

Revista de los Progresos de las Ciencias Exactas Fisicas y Naturales - Real Academia de Ciencias Exactas Físicas y Naturales de Madrid. (Real Academia de Ciencias Exactas, Físicas y Naturales, 1864)

Revista de los Progresos de las Ciencias Exactas Fisicas y Naturales - Real Academia de Ciencias Exactas Físicas y Naturales de Madrid. (Real Academia de Ciencias Exactas, Físicas y Naturales, 1865)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1883)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1886)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1893)

Revue de mycologie - Laboratoire de cryptogamie, Paris (Laboratoire de cryptogamie, 1957)

Revue des travaux scientifiques - France. Ministère de l'Instruction publique (Imprimerie nationale, 1892)

Revue des travaux scientifiques - France. Ministère de l'Instruction publique (Imprimerie nationale, 1893)

Revue générale de botanique (Libraire générale de l'enseignement, 1900)

Revue générale de botanique (Libraire générale de l'enseignement, 1905)

Revue générale de botanique (Libraire générale de l'enseignement, 1906)

Revue générale de botanique (Libraire générale de l'enseignement, 1914)

Revue générale de botanique (Libraire générale de l'enseignement, 1920)

Revue générale de botanique (Libraire générale de l'enseignement, 1921)

Revue horticole (Librairie agricole de la maison rustique, 1862)

Revue horticole (Librairie agricole de la maison rustique, 1867)

Revue horticole (Librairie agricole de la maison rustique, 1890)

Revue horticole (Librairie agricole de la maison rustique, 1903)

Revue mycologique (Bureaux de la rédaction, 1905)

Revue scientifique du Bourbonnais et du centre de la France - Olivier, Ernest, 1844 -1914 (Impr. É. Auclaire, 1888)

La Revue scientifique du Limousin - Le Gendre, Charles. (Impr.-Librairie Ve. H. Ducourtieux, 1893)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1996)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1998)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1904)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1905)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1921)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1951)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1953)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1958)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1976)

Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1913)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1903)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1906)

Rock and alpine plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (George L. Ehrle, 1932)

Rock garden and alpine plants : cash and carry only - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cloud Hill Nursery, 1951)

Rovartani lapok : havi folyóirat különös tekintettel a hasznos és kártékony rovarokra - Magyar Entomologiai Társaság. (Magyar Entomologiai Társaság, 1906)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1878)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1901)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1919)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1931)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1933)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1934)

Rustic adornments for homes of taste - Hibberd, Shirley, 1825 -1890 (W.H. and L. Collingridge, 1895)

Rynveld's bulbs : wholesale catalog, Autumn 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Rynveld & Sons, 1930)

Sandusky flora. A catalogue of the flowering plants and ferns growing without cultivation in Erie county, Ohio, and the peninsula and islands of Ottawa County - Moseley, Edwin Lincoln, 1865 -1948 (Clapper, 1899)

Schling's breath of spring, fall 1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Max Schling Seedsmen, Inc, 1940)

Die Schmetterlinge der Schweiz - Müller-Rutz, J. (K.J. Wyss, 1911)

Die Schmetterlinge Europas - Hofmann, Ernst, 1837 -1892 (E. Schweizerbart, 1908)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1882)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1884)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1895)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1899)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1898)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1902)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1907)

Schriften des Naturwissenschaftlichen Vereins für Schleswig-Holstein - Naturwissenschaftlicher Verein für Schleswig-Holstein. (Lipsius & Tischer, 1878)

Schriften des Naturwissenschaftlichen Vereins für Schleswig-Holstein - Naturwissenschaftlicher Verein für Schleswig-Holstein. (Lipsius & Tischer, 1881)

Schriften des Naturwissenschaftlichen Vereins für Schleswig-Holstein - Naturwissenschaftlicher Verein für Schleswig-Holstein. (Lipsius & Tischer, 1889)

Schweizerische Blätter für Ornithologie : Geflügel-Tauben- und Kaninchenzucht - Schweizerischer Geflügelzucht-Verein. (Schweizerischer Geflügelzucht-Verein, 1917)

Schweizerisches Pflanzen-Idiotikon : ein Wörterbuch von Pflanzenbenennungen in den verschiedenen Mundarten der deutschen, französischen und italienischen Schweiz : nebst deren lateinischen, französischen und deutschen Namen : zum Gebrauch für Mediciner, Pharmaceuten, Lehrer, Droguisten und Botaniker - Durheim, Carl Jakob, 1780 - (Huber & Comp.(Körber), 1856)

Science-gossip (Simpkin Marshall, Hamilton, Kent & Co, 1901)

Science progress (John Murray, 1920)

Scientific memoirs, selected from the transactions of foreign academies of science, and from foreign journals. Natural history - Huxley, Thomas Henry, 1825 -1895 (Taylor and Francis, 1853)

Scotia illustrata sive Prodromus historiæ naturalis in quo regionis natura, incolarum ingenia & mores, morbi iisque medendi methodus, & medicina indigena accurratè explicantur ... - Colmarius, Johannes (Edinburgh) (ex officinâ typographicâ Jacobi Kniblo, Josuæ Solingensis & Johannis Colmarii, sumptibus auctoris, 1684)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1883)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1889)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 2003)

A second Ohio weed manual : general weed questions : revised descriptive illustrated list of Ohio weeds - Selby, A. D. (Augustine Dawson), 1859 -1924 (Ohio Agricultural Experiment Station, 1906)

Selectus e seminario Horti Botanici Cracoviensis - Uniwersytet Jagielloński. Ogród Botaniczny. (Hort Botanici Gracoviensis, 1925)

Selectus e seminario Horti Botanici Cracoviensis - Uniwersytet Jagielloński. Ogród Botaniczny. (Hort Botanici Gracoviensis, 1926)