Prodromus der Flora von Böhmen. Enthaltend die Beschreibungen und Verbreitungsangaben der wildwachsenden und im Freien kultivirten Gefässpflanzen des Königreiches ... - Celakovský, Ladislav Josef, 1834 -1902 (Selbstverlag des Comité's, 1867)

Prodromus florae argentoratensis - Spielmann, Jacob Reinbold, 1722 -1783 (Apud J.G. Bauerum, 1766)

Prodromus florae Suidniciensis - Helmrich, Karl, 1833 - (Gustavus Schade, 1857)

Prodromus systematis naturalis regni vegetabilis, sive, Enumeratio contracta ordinum generum specierumque plantarum huc usque cognitarium, juxta methodi naturalis, normas digesta - Candolle, Augustin Pyramus de, 1778 -1841 (Sumptibus Sociorum Treuttel et Würtz, 1836)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1905)

A progress report on the investigations of the European corn borer - Caffrey, D. J. (U.S. Dept. of Agriculture, 1927)

Proposed estuarine sanctuary grant award to the state of New York for a Hudson River estuarine sanctuary - National Ocean Survey. Office of Coastal Zone Management. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Office of Coastal Zone Management, 1982)

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 (1890)

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

A provisional list of the parasitic fungi of Wisconsin - Davis, John Jefferson. (1914)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1889)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1922)

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, 1940)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1974)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1950)

Rare plants : autumn, 1929 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank W. Campbell, 1929)

Résultats scientifiques du Congrès international de botanique, Vienne 1905 = Wissenschaftliche Ergebnisse des Internationalen botanischen Kongresses, Wien 1905 - Lotsy, Johannes Paulus, 1867 -1931 (G. Fischer, 1906)

A record of the fungi named by J.B. Ellis - United States. Bureau of Plant Industry, Soils,; Agricultural Engineering. (Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, U.S. Dept. of Agriculture, 1952)

Recueil des Actes de la Séance Publique de l'Académie Imperiale des Sciences de St.Petersbourg - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (1844)

The relation of leaf structure to physical factors - Clements, Edith S. (Edith Schwartz) (1905)

Reliably hardy evergreens for fall planting : autumn 1915 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1915)

Reliably hardy evergreens for fall planting : autumn 1916 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (New England Nurseries, 1916)

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)

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

Repertorium specierum novarum regni vegetabilis (Selbstverlag des Herausgebers, 1917)

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. (1912)

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. (1935)

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 botanical exploration of southwestern Virginia during the season of 1892 - Small, John Kunkel, 1869 -1938 (1893)

Report of the Botanist - New York (State). State Botanist. (James B. Lyon, State Printer, 1867)

Report of the Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, Office of the Regents, 1878)

Report of the botanist - Connecticut Agricultural Experiment Station. (Connecticut Agricultural Experiment Station, 1903)

Report of the Geological Survey of Ohio - Geological Survey of Ohio. (Nevins & Myers, state printers, 1893)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1905)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1904)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1907)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1912)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1913)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1914)

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

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1904)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1909)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1916)

Report of the State Entomologist of Connecticut for the year - Connecticut Agricultural Experiment Station. (1901)

Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1893)

Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1892)

Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1904)

Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1907)

Report of the State Entomologist on the noxious and beneficial insects of the state of Illinois - Illinois State Entomologist. (State Entomologist, 1878)

Report of the State Entomologist on the noxious and beneficial insects of the state of Illinois - Illinois State Entomologist. (State Entomologist, 1882)

Report of the State Entomologist on the noxious and beneficial insects of the state of Illinois - Illinois State Entomologist. (State Entomologist, 1885)

Report of the State Entomologist on the noxious and beneficial insects of the state of Illinois - Illinois State Entomologist. (State Entomologist, 1909)

Report on the botany of Madison, Lincoln, Garrard, Washington, and Marion Counties, Kentucky - Kentucky. State Geologist. (Yeoman Press, 1882)

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 the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1897)

Reports of the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1901)

Reports of the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1904)

Reports of the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1910)

Reports of the Survey. Botanical series - Geological; Natural History Survey of Minnesota. (1892)

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

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

Retail list : shrubs and trees, vines and perennials, 1938-1939 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1938)

Retail [price] list : 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Otto Wittbold Nursery, 1925)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1917)

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

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)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1888)

Revue horticole (Librairie agricole de la maison rustique, 1884)

Revue horticole (Librairie agricole de la maison rustique, 1897)

Revue horticole (Librairie agricole de la maison rustique, 1899)

Revue horticole (Librairie agricole de la maison rustique, 1900)

Revue horticole (Librairie agricole de la maison rustique, 1901)

Revue horticole (Librairie agricole de la maison rustique, 1913)

Revue mycologique (Bureaux de la rédaction, 1885)

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

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1922)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1933)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1948)

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

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1962)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1977)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1992)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1995)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1996)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2004)

Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1902)

Rock River area assessment - Illinois. Dept. of Natural Resources. (Illinois Dept. of Natural Resources, 1996)

Rocky Mountain flowers : an illustrated guide for plant-lovers and plant-users - Clements, Frederic E. (Frederic Edward), 1874 -1945 (H. W. Wilson, 1920)

Rocky mountain flowers; an illustrated guide for plantlovers and plant-users - Clements, Frederic E. (Frederic Edward), 1874 -1945 (the H.W. Wilson company, 1914)

Roosevelt wild life bulletin ... of the Roosevelt Life Forest Experiment Station of the New York College of Forestry at Syracuse University - New York State College of Forestry at Syracuse University. Roosevelt Wild Life Forest Experiment Station. (The University, 1940)

Rose Hill Nursery, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rose Hill Nursery, 1932)

Roses : also fruit trees, trees, shrubs, herbaceous and rock plants, garden seeds and bulbs : catalogue 1935-36 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Chaplin Bros. Ltd, 1935)

Roses, ornamental trees and shrubs, fruit trees, berry vines, perennial plants, garden requisites, 1941 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Sunset Nursery Co., Incorporated, 1941)

Roses, ornamental trees and shrubs, fruit trees, berry vines, perennial plants, garden requisites, 1942 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Sunset Nursery Co., Incorporated, 1942)

Roses, perennials, shrubs and evergreens, 1934 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Bobbink & Atkins, 1934)

Roses, vines, shrubs, perennials, evergreens, fruit trees, small fruits, ornamental trees, large tree moving, landscape contracting - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.E. Ilgenfritz Sons Company, 1938)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1900)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1907)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1926)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1928)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1933)

Sämereien zum Tausch aus dem grossherzoglichen botanischen Garten der Universität Rostock - Universität Rostock. Botanischer Garten. (Botanischer Garten zu Rostock, 1938)

Samen-Tauschliste - Schwabe, Willmar. (Arzneipflanzen-Lehr- und Versuchsgarten des wissenschaftlichen Laboratoriums Dr. Willmar Schwabe, 1938)

Samen-Tauschliste - Schwabe, Willmar. (Arzneipflanzen-Lehr- und Versuchsgarten des wissenschaftlichen Laboratoriums Dr. Willmar Schwabe, 1941)

Samen-Tauschverzeichnis des Botanschen Gartens der Universität Graz - Universität Graz. Botanischer Garten. (Verlag des Instituts für systematische Botanik der Universität Graz, 1909)

Samen- und Pflanzen-Tauschliste des botanischen Gartens der Kgl. Technischen Hochschule Stuttgart - Technische Hochschule Stuttgart. Botanischer Garten. (Technische Hochschule in Stuttgart, 1928)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1936)

Samen-Verzeichnis des Botanischen Gartens der Universitãt Greifswald - Ernst-Moritz-Arndt-Universität Greifswald. Botanischer Garten. ([Botanischer Garten], 1904)

Samen-Verzeichnis des botanischen Gartens in Halle a.S - Martin-Luther-Universität Halle-Wittenberg. Botanischer Garten. (Druck von Ehrhardt Karras, 1908)

Samen-Verzeichnis des botanischen Gartens in Halle a.S - Martin-Luther-Universität Halle-Wittenberg. Botanischer Garten. (Druck von Ehrhardt Karras, 1913)

Samen-Verzeichnis des Staatl. Botanischen Gartens zu Dresden - Technische Universität Dresden. Botanischer Garten. (Koeniglich Botanischer Garten zu Dresden, 1897)

Samen-Verzeichnis des Staatl. Botanischen Gartens zu Dresden - Technische Universität Dresden. Botanischer Garten. (Koeniglich Botanischer Garten zu Dresden, 1935)

Samenhandlung - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Emil Mauser, 1925)

Samenverzeichnis des k.k. botanischen Gartens in Salzburg - Universität Salzburg. Botanischer Garten. ([Botanischer Garten der alten Universität Salzburg], 1907)

Samuel Barnum Mead and John Torrey correspondence, 1841-1847 - Mead, Samuel Barnum, 1798 -1880 (1841)

Schedule of prizes offered by the Massachusetts Horticultural Society - Massachusetts Horticultural Society (The Society, 1867)

Schlesiens Pflanzenwelt. Eine pflanzengeographische Schilderung der Provinz - Pax, Ferdinand, 1858 -1942 (G. Fischer, 1915)

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, 1886)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1888)

Schriften der Naturforschenden Gesellschaft in Danzig - Naturforschende Gesellschaft in Danzig. (Auf Kosten der Naturforschenden Gesellschaft, 1904)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1884)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1892)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1894)

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

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1911)

Schriften der Physikalisch-Ökonomischen Gesellschaft zu Königsberg - Physikalisch-Ökonomische Gesellschaft zu Königsberg (In Commission bei Gräfe und Unzer, 1913)

Schriften des Naturwissenschaftlichen Vereins für Schleswig-Holstein - Naturwissenschaftlicher Verein für Schleswig-Holstein. (Lipsius & Tischer, 1876)

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