Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge - American Philosophical Society. (American Philosophical Society, 1911)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1978)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1948)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1977)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1978)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1896)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1923)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1971)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2004)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1928)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1927)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1932)

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1862)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1905)

Proceedings of the section of sciences - Koninklijke Akademie van Wetenschappen (Netherlands) (Johannes Müller, 1906)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1885)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1901)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1954)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1967)

Progressus rei botanicae = Fortschritte der Botanik = Progrès de la botanique = Progress of botany - Association internationale des botanistes. (G. Fischer, 1907)

Pronunciation of plant names - Garden Club of America. (Reproduced and printed by National Process Company], 1922)

The propagation of plants, giving the principles which govern the development and growth of plants, their botanical affinities and peculiar properties; also, descriptions of the process by which varieties and species are crossed or hybridized, and the many different methods by which cultivated plants may be propagated and multiplied - Fuller, Andrew S. (Andrew Samuel), 1828 -1896 (Orange Judd co, 1887)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1888)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1891)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1899)

Publication. Field Columbian Museum Botanical series - Field Columbian Museum. (Field Columbian Museum, 1895)

Publication. Field Columbian Museum Botanical series - Field Columbian Museum. (Field Columbian Museum, 1896)

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

Ramsey's Austin Nursery, 1875-1944, nurserymen and landscape contractors - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1944)

Ramsey's Austin Nursery, 1875-1945 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1945)

Ramsey's Austin Nursery, 1875-1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1947)

Ramsey's Austin Nursery, nurserymen and landscape designers : 1929 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1929)

Ramsey's Austin Nursery, nurserymen and landscape designers : 1875-1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1931)

Ramsey's Austin Nursery, nurserymen and landscape designers : 1928 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1928)

Ramsey's Austin Nursery, nurserymen and landscape designers : 1875-1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1930)

Ramsey's catalogue of bargains in trees and plants of highest quality ... : 1875-1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ramsey's Austin Nursery, 1932)

Range plants of Arizona and New Mexico : names, symbols and notations - Rocky Mountain Forest; Range Experiment Station (Fort Collins, Colo.) (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S.D.A, 1958)

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

Regiones terrestres prioritarias de México - Aguilar Zúñiga, Claudia (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2000)

Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1892)

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 specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1908)

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

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1912)

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1914)

Report of an investigation of the grasses of the arid districts of Texas, New Mexico, Arizona, Nevada, and Utah, in 1887 - Tracy, S. M. (Samuel Mills), 1847 -1920 (Govt. Print. Off, 1888)

Report of the Commissioner of Agriculture ... - United States. Department of Agriculture. (G.P.O, 1862)

Report of the Commissioner of Agriculture ... - United States. Department of Agriculture. (G.P.O, 1863)

Report of the Prickly-pear Travelling Commission. 1st November, 1912-30th April, 1914 - Queensland. Prickly-pear Travelling Commission. (A. J. Cumming, government printer, 1914)

Report on the botany of the expedition - Torrey, John, 1796 -1873 ([s.n.], 1857)

Report on the flora of western and southern Texas - Havard, Valery, 1846 -1927 (1885)

Report on the United States and Mexican boundary survey :made under the direction of the secretary of the Interior - Emory, William H. 1811 -1887 (C. Wendell, printer, 1859)

Report on the United States and Mexican boundary survey :made under the direction of the secretary of the Interior - Emory, William H. 1811 -1887 (C. Wendell, printer, 1857)

Report upon United States Geographical surveys west of the one hundredth meridian - Geographical Surveys West of the 100th Meridian (U.S.) (G.P.O, 1878)

Reports of explorations and surveys : to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson printer, 1855)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1856)

Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean - Baird, Spencer Fullerton, 1823 -1887 (A.O.P. Nicholson, Printer [etc.], 1853)

Résultats des campagnes scientifiques accomplies sur son yacht par Albert Ier, prince souverain de Monaco ... - Albert I, Prince of Monaco, 1848 -1922 (Impr. de Monaco, 1912)

Retail catalog : spring & summer 1931 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Japanese Nursery, 1931)

Retail list : shrubs, trees, vines, perennials, 1937-1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1937)

Retail price list 1921 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lindley Nurseries Inc, 1921)

Retail price list : 1923 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J. Van Lindley Nursery Company, 1923)

Retail price list 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lindley Nurseries Inc, 1925)

Retail price list : 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lindley Nurseries Inc, 1927)

Retail price list : fall 1922 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Lindley Nurseries Inc, 1922)

Retail price list fall 1924 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (J. Van Lindley Nursery Company, 1924)

Retail price list, fall 1932 spring 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Mecklenburg Nurseries, Inc, 1932)

Retail price list : nursery stock, Wilcox quality and standard - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Roy F. Wilcox & Co, 1937)

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

Revue des sciences naturelles (1883)