Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1985)

Proceedings of the Delaware County Institute of Science - Delaware County Institute of Science. (The Institute, 1905)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1911)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1949)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1984)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1986)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1990)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1991)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1993)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1994)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 1998)

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

Proceedings of the Hawaiian Entomological Society - Hawaiian Entomological Society. (Hawaiian Entomological Society, 1918)

Proceedings of the Hawaiian Entomological Society - Hawaiian Entomological Society. (Hawaiian Entomological Society, 1919)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1908)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1916)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1918)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1919)

Proceedings of the International conference on plant hardiness and acclimatization, 1907, held in the rooms of the American institute of the city of New York and in the Museum building of the New York botanical garden, october 1st to 3rd, 1907 (1910)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1905)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1906)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1913)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1915)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1918)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1919)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1922)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1906)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1909)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1944)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1969)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1894)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1920)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1931)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1965)

Prodromus designationis stirpium gottingensium - Murray, Johann Andreas, 1740 -1791 (Impensis Io. Chr. Dieterich, 1770)

Prodromus stirpium in horto ad Chapel Allerton vigentium - Salisbury, R. A. (Richard Anthony), 1761 -1829 ([s.n.], 1796)

The Production of lumber in 1913 - United States. Office of Industrial Investigations. (U.S. Dept. of Agriculture, 1915)

ProHort - Center for Urban Horticulture (1984)

ProHort - Center for Urban Horticulture (1985)

ProHort - Center for Urban Horticulture (1988)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1921)

pu yang zhi wu zhi - Zhang, Junpu, Wu Hongchen, Zhu Xuewen & Ma Yipin (zhong guo ke xue ji shu chu ban she, 1996)

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

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

Putney's 1957 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1957)

Putney's 1959 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, Inc, 1959)

qing hai mu ben zhi wu zhi - Li, Yaojie (qing hai ren min chu ban she, 1987)

qing zang gao yuan yan jiu heng duan shan kao cha zhuan ji - Zhongguo ke xue yuan. Qing zang gao yuan zong he ke xue kao cha dui (yun nan ren min chu ban she, 1983)

Quality nursery stock : 1955-1956 : wholesale list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1955)

Quality nursery stock : wholesale list, 1953-1954 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1953)

Quality nursery stock : wholesale list, spring 1958 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rich & Sons Nursery, 1958)

The Quarterly review of biology - American Society of Naturalists. (Published by the Stony Brook Foundation, Inc. for the State University of New York at Stony Brook, 1928)

Queen Anne's county - Maryland Geological Survey. (The Johns Hopkins press, 1926)

Your guide to a more beautiful and fruitful manner of living - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oak Park Nurseries, Inc, 1958)

The Reading Nursery - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Reading Nursery, 1898)

Reading Nursery [catalogue] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Jacob W. Manning, 1907)

Ready now! Forrest Keeling's annual green thumb sale - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (St. Louis Post-Dispatch, 1957)

Ready now! : Forrest Keeling's annual spring green thumb sale! - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Forrest Keeling Nurseries, 1959)

Record book of the plants on the "Place in the Woods" - Fairchild, David, 1869 -1954 (1907)

Recueil de mémoires et autres pièces de prose et de vers : qui ont été lus dans les séances de la Société des amis des sciences, des lettres, de l'agriculture et des arts, à Aix - Société des amis des sciences, des lettres, de l'agriculture et des arts (Aix-en-Provence, France) (Augustin Pontier, 1819)

Recueil de planches de botanique de l'encyclopédie - Audebert, J. B. (Jean Baptiste), 1759 -1800 (Chez Mme. Veuve Agasse, imprimeur-libraire, 1823)

Reduced prices effective July 1, 1921 - Harrison's Nurseries (Berlin, Md.) (Harrisons', 1921)

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)

Reference catalog : ornamental trees, shrubs, evergreens, perennial plants, roses, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Southern Nursery and Landscape Company, 1940)

Reforesting Pennsylvania's waste land - Conklin, William Gardiner, 1886 - (W.S. Ray, state printer, 1916)

Reise durch einige der mittlern und su¨dlichen Vereinigten Nordamerikanischen Staaten, nach Ost-Florida und den Bahama Inseln unternommen in den jahren 1783 und 1784 - Schöpf, Johann David, 1752 -1800 (J.U. & C.G. Lloyd, 1911)

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)

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

Report of the Botanical Department of the New Jersey Agricultural College Experiment Station - New Jersey Agricultural Experiment Station. (The Station, 1901)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1956)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1901)

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 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, 1891)

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, 1917)

A report on the insects of Massachusetts, injurious to vegetation - Harris, Thaddeus William, 1795 -1856 (Folsom, Wells, and Thurston, printers to the University, 1841)

A report on the trees and shrubs growing naturally in the forests of Massachusetts : Published agreeably to an order of the Legislature, by the Commissioners on the zoological and botanical survey of the state - Emerson, George B. (George Barrell), 1797 -1881 (Dutton and Wentworth, Printers, 1846)

A report on the trees and shrubs growing naturally in the forests of Massachusetts. Originally published agreeably to an order of the legislature by the commissioners on the zoological and botanical survey of the state - Emerson, George B. (George Barrell), 1797 -1881 (Little, Brown, and Co, 1875)

A report on the trees and shrubs growing naturally in the forests of Massachusetts - Emerson, George B. (George Barrell), 1797 -1881 (Little, Brown, and Company, 1903)

A report on the trees and shrubs growing naturally in the forests of Massachusetts. Originally published agreeably to an order of the Legislature, by the Commissioners on the Zoological and Botanical Survey of the State - Emerson, George B. (George Barrell), 1797 -1881 (Brown, 1894)

Reporting Pennsylvania's waste land - Conklin, William Gardiner, 1886 - (W. S. Ray, state printer, 1916)

Reports of the Commissioners on the zoological survey of the state - Harris, Thaddeus William, 1795 -1856 (Dutton and Wentworth, state printers, 1838)

Reports of the Commissioners on the zoological survey of the state - Harris, Thaddeus William, 1795 -1856 (Dutton and Wentworth, State Printers, 1838)

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

Research bulletin : bulletin of the Agricultural Experiment Station of Nebraska - University of Nebraska (Lincoln campus). Agricultural Experiment Station. (Agricultural Experiment Station of Nebraska, 1916)

Research in photosynthesis; papers and discussions presented at the Gatlinburg conference, October 25-29, 1955, sponsored by the Committee on Photobiology of the National Academy of Sciences-National Research Council and supported by the National Science Foundation - Gaffron, H. (Interscience Publishers, 1957)

Retail list and wholesale list : shrubs, trees, vines, ferns, 1939-1940 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Tuttle Bros. Nurseries, 1939)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1956)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1957)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1958)

Retail price list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Laird's Nurseries, 1959)

Retail price list, 1935 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Princeton Nurseries, 1935)

Retail price list, 1936 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Princeton Nurseries, 1936)

Retail price list : growers of fine hardy ornamental plants, new and unusual materials a specialty, landscape contractors - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cottage Gardens, 1955)

Retail price list : growers of fine hardy ornamental plants, new and unusual materials a specialty, landscape contractors - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Cottage Gardens, 1951)

Retail price list of Coe, Converse & Edwards Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1927)

Retail price list of hardy nursery products - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pontiac Nursery Co, 1927)

Retail price list of the Coe, Converse & Edwards Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1931)

Retail price list of the Coe, Converse & Edwards Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1933)

Retail price list of the Coe, Converse & Edwards Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1934)

Retail price list of the Coe, Converse & Edwards Co., nurserymen - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1938)

Retail price list of the Coe, Converse & Edwards Co., nurserymen - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1942)

Retail price list of the Coe, Converse & Edwards Co., nurserymen - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Coe, Converse & Edwards Co, 1936)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1916)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1918)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1919)

A review of the modern state of botany, with a particular reference to the natural systems of Linnaeus and Jussieu - Smith, James Edward, 1759 -1828 (Longman, Rees, Orme, Brown, Green, and Longman, 1832)

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

Revised price list : fall 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.J. Weber & Sons Nursery Co, 1937)

Revised price list : spring 1937 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (H.J. Weber & Sons Nursery Co, 1937)

Revisio generum plantarum vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum, mit erläuterungen - Kuntze, Otto, 1843 -1907 (A. Felix [etc., etc.], 1891)

A revision of the North American species of beetles belonging to the family Bostrichidae - Fisher, Warren Samuel, 1878 -1971 (U.S. Dept. of Agriculture, 1950)

A revision of the spider mite family Tetranychidae - Pritchard, A. Earl (Arthur Earl), 1915 -1965 (Pacific Coast Entomological Society, 1955)

Rhododendrons, azaleas, specimen conifers, rare plants, 1936 : Carolina mountain flowers and hardy native American plants - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Harlan P. Kelsey, Inc, 1936)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1918)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1936)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1944)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1945)

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

Rhynchophora or weevils of north eastern America - Blatchley, W. S. (Willis Stanley), 1859 -1940 (The Nature Publishing Company, 1916)

Richards' Gardens, [Fort Collins, Colo.] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Richards' Gardens, 1947)

Rock garden plants, hardy perennials, hybrid lilacs, cotoneasters, azaleas, flowering apples, fruit trees and ornamental trees and shrubs : 1930 [price list] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Weston Nurseries, 1930)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1976)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1980)

The romance of our trees - Wilson, Ernest Henry, 1876 -1930 (Doubleday, Page, 1920)

Root development of field crops - Weaver, John E. (John Ernest),‏ ‎ 1884 -1966 (McGraw-Hill book company, inc, 1926)

Rooting habits of selected commercial tree species of the eastern United States : a bibliography - Every, Leanne. (G.P.O, 1980)

Roots of forest trees : a selected list of references - California Forest; Range Experiment Station. (California Forest and Range Experiment Station, 1949)

Rose bushes, fruit, shade and coniferous trees, and flowering shrubs : fall '53-spring '54 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Richmond Nurseries, 1953)

Rose Hill Nursery [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rose Hill Nursery, 1928)

Rose Hill Nursery [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rose Hill Nursery, 1931)

Rose Hill Nursery [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rose Hill Nursery, 1926)

Rose Hill Nursery [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Rose Hill Nursery, 1921)