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Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1936)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1938)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1939)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1937)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1940)

Quality plants, bulbs, seeds : wholesale list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nurserymen's Exchange, 1947)

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Quarterly summary of re-identifications, July, August, September 1961 : Change No. 6 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

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Rad - Jugoslavenska akademija znanosti i umjetnosti. Razred za prirodne nauke. (Jugoslavenska akademija znanosti i umjetnosti, 1872)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2001)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2002)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2006)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2005)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2004)

Rapid inventories, biological and social - Field Museum of Natural History. (Field Museum, 2008)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1901)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1904)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1899)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1902)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1903)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1895)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1898)

Rare Florida flowers and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jessamine Gardens, 1900)

Rare Florida flowers and fruits, 1896 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pike & Ellsworth, 1896)

Rare flower bulletin. bulletin no. 7 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1948)

Rare flower bulletin. bulletin no. 9 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1949)

Rare flower bulletin. bulletin no. 8 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rex D. Pearce, 1948)

Rare plants by mail : wholesale and retail : retail list no. 65 - Charles L. Cass (Firm) (Charles L. Cass, 1950)

Répertoire des plantes utiles et des plantes vénéneuses du globe contenant la synonymie latine et française des plantes, leurs noms vulgaires français et l'indication de leurs usages ... précédé d'un traité indispensable aux personnes qui veulent herboriser, et composer des herbiers - Duchesne, E. A. (Edouard Adolphe), 1804 -1869 (J. Renouard, 1836)

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Reduction of all the genera of plants contained in the Catalogus plantarum Americæ septentrionalis, of the late Dr. Muhlenberg, to the natural families of Mr. de Jussieu's system : For the use of the gentlemen who attended the course of elementary and philosophical botany in Philadelphia, in 1815 - Correia da Serra, José Francisco, 1750 -1823 (Published by Solomon W. Conrad, no. 87, Market Street, 1815)

Refugium botanicum : or figures and descriptions from living specimens, of little known or new plants of botanical interest - Baker, John Gilbert, 1834 -1920 (J. van Voorst, 1872)

Las regiones botánico-geográficas del Estado de Oaxaca : con una carta anexa - Conzatti, Cassiano, 1862 -1951 (La Esfera, 1926)

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Reichenbachia :Orchids illustrated and described - Sander, F. 1847 -1920 (F. Sander & Co., Orchid growers & importers;H. Sotheran & Co.;I. Forstermann, [etc., etc.], 1888)

Reichenbachia :Orchids illustrated and described - Sander, F. 1847 -1920 (F. Sander & Co., Orchid growers & importers;H. Sotheran & Co.;I. Forstermann, [etc., etc.], 1890)

Reichenbachia :orchids illustrated and described - Sander, F. 1847 -1920 (F. Sander, 1892)

Reise nach Brasilien in den Jahren 1815 bis 1817 - Wied, Maximilian, Prinz von, 1782 -1867 (Gedruckt und verlegt bey H.L. Brönner, 1820)

Reise nach den Inseln Teneriffa, Trinidad, St. Thomas, St. Crux und Porto-Rico; auf Befehl der franzo¨sischen Regierung, vom 30. Sept. 1796 bis zum 7. Juni 1789, unter der Leitung des Capitain Baudin unternommen - Sonnini, C. S. (Charles Sigisbert), 1751 -1812 (H. Büschler, 1811)

Reise, nach den spanischen Ländern in Europa und America in den Jahren 1751-bis 1756, nebst Beobachtungen und Anmerkungen über die merkwürdigen Genwächse - Linné, Carl von, 1707 -1778 (G. A. Lange, 1766)

Reisen in Britisch-Guiana in den Jahren 1840-1844 : nebst einer Fauna und Flora Guiana's nach Vorlagen von Johannes Müller, Ehrenberg, Erichson, Klotzsch, Troschel, Cabanis und Andern - Ehrenberg, Christian Gottfried, 1795 -1876 (J. J. Weber, 1847)

Reisen in Britisch-Guiana in den Jahren 1840-1844 : nebst einer Fauna und Flora Guiana's nach Vorlagen von Johannes Müller, Ehrenberg, Erichson, Klotzsch, Troschel, Cabanis und Andern - Ehrenberg, Christian Gottfried, 1795 -1876 (J. J. Weber, 1848)

Reisen in den Vereinigten Staaten, Canada und Mexico - Müller, J. W. von Baron (Johann Wilhelm) 1824 -1866 (F.A. Brockhaus, 1864)

Reliquiae Baldwinianae : 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)

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 Haenkeanae, seu, Descriptiones et icones plantarum :quas in America meridionali et boreali, in insulis Philippinis et Marianis collegit Thaddaeus Haenke - Šternberg, Kašpar, Graf, 1761 -1838 (Apud J.G. Calve, 1830)

Répertoire des noms génériques mentionnés dans l'Index kewensis et ses quinze premiers suppléments = Guide to the generic names appearing in the Index Kewensis and its fifteen supplements = Repertorio de los nombres genericos enumerados en el Index Kewensis y sus quince suplementos = Repertorium der im Index Kewensis und seinen fuenfzehn ersten Supplementen erwaehnten Gattungsnamen - Rouleau, Ernest 1916 -1991 (Châtelain, 1981)

Repertorium annuum literaturae botanicae periodicae - Bemmelen, J. A. van. (Erven Loosjes, 1873)

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

Repertorium specierum novarum regni vegetabilis. Beihefte (Verlag des Repertoriums, 1914)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1905)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1906)

Repertorium specierum novarum regni vegetabilis. Beihefte (Verlag des Repertoriums, 1919)