Physiographiska Sällskapets Tidskrift - Physiographiska Sallskapet i Lund (1837)

Physiologische Pflanzenanatomie - Haberlandt, Gottlieb, 1854 -1945 (W. Engelmann, 1904)

The physiology of plants; a treatise upon the metabolism and sources of energy in plants - Pfeffer, W. (Wilhelm), 1845 -1920 (Clarendon press, 1900)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1975)

The Phytologist: a popular botanical miscellany - Newman, Edward, 1801 -1876 (John van Voorst, 1841)

Phytoneuron (Guy L. Nesom, 2014)

Die Pilze (Fungi) von Tirol, Vorarlberg und Liechtenstein - Magnus, P. (Paul), 1844 -1914 (Verlag der Wagner'schen Universitts-Buchh, 1905)

Die Pilze Schlesiens - Schroeter, J. (J.U. Kern's Verlag, 1889)

Plant explorations : ornamentals in the Netherlands, West Germany, and Belgium - Meyer, Frederick G. 1917 -2006 (Agricultural Research Service, U.S. Dept. of Agriculture, 1963)

Plant Form - Bell, Adrian D. (OXFORD UNIVERSITY PRESS, 1991)

Plant growth regulation - Boyce Thompson Institute for Plant Research. (Iowa State University Press, 1961)

Plant health care for woody ornamentals : a professional's guide to preventing and managing environmental stresses and pests - International Society of Arboriculture. (Cooperative Extension Service, College of Agricultural, Consumer and Environmental Sciences, University of Illinois at Urbana-Champaign, 1997)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1966)

Plant lore, legends, and lyrics. Embracing the myths, traditions, superstitions, and folk-lore of the plant kingdom - Folkard, Richard. (S. Low, Marston, Searle, and Rivington, 1884)

Plant materials of decorative gardening; the woody plants - Trelease, William, 1857 -1945 (The author, 1921)

Plant materials of decorative gardening; the woody plants - Trelease, William, 1857 -1945 (The author, 1917)

Plant morphogenesis - Sinnott, Edmund W. (Edmund Ware), 1888 -1958 (McGraw-Hill, 1960)

Plant names - Lindsay, Thomas Somerville Reeves, 1854 - (Sheldon, 1923)

Plant physiology; authorized English translation by R. J. HarveyGibson; supplement incorporating the alterations of the 2d ed. of the German original - Harvey-Gibson, R. J. (Robert John), 1860 -1929 (Clarendon Press, 1913)

Plant physiology, with special reference to plant production - Duggar, Benjamin M. (Benjamin Minge), 1872 -1956 (The Macmillan company, 1911)

Plant physiology, with special reference to plant production - Duggar, Benjamin M. (Benjamin Minge), 1872 -1956 (MacMillan, 1920)

Plant responses to salinity : an indexed bibliography (Office of the Regional Administrator for Agricultural Research (Western Region), Science and Education Administration, U.S. Department of Agriculture, 1978)

Plantae Thunbergianae : ein Verzeichnis der von C. P. Thunberg in Südafrika, Indien und Japan gesammelten und der in seinen Schriften beschriebenen oder erwähnten Pflanzen, sowie von den Exemplaren derselben, die im Herbarium Thunbergianum in Upsala aufbewahrt sind - Thunberg, Carl Peter, 1743 -1828 (A.-b. Akademiska bokhandeln, 1918)

Les plantes, poème - Castel, René-Richard-Louis, 1758 -1832 (L'Imprimerie de Didot Jeune, chez Deterville, 1799)

Planting guide ... for the Northwest : trees, shrubs, roses, peonies, vines, plants and fruits - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Milton Nursery Company, 1932)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1960)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1964)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1967)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1971)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1992)

Plants, their natural growth and ornamental treatment - Hulme, F. Edward (Frederick Edward), 1841 -1909 (Marcus Ward & Co, 1874)

Pollen - Edgeworth, Michael Pakenham, 1812 -1881 (Hardwicke & Bogue, 1877)

Pontiac Nursery Company [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pontiac Nursery Co, 1921)

Pontiac planting guide - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pontiac Nursery Co, 1930)

Pontiac planting guide [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pontiac Nursery Co, 1926)

Popular botany; the living plant from seed to fruit - Step, Edward, 1855 -1931 (H. Holt and company, 1913)

Pozsonyi Orvos-Termeszettudomanyi Egyesulet Kozlemenyei - Verein für natur- und heilkunde, Pressburg (1901)

A practical handbook of trees, shrubs, vines and herbaceous perennials - Kirkegaard, John (The Bullard company, 1912)

Practical physiology of plants - Darwin, Francis, Sir, 1848 -1925 (University Press, 1894)

Practical physiology of plants - Darwin, Francis, Sir, 1848 -1925 (University press, 1901)

Practical physiology of plants - Darwin, Francis, Sir, 1848 -1925 (University Press, 1907)

Practical physiology of plants - Darwin, Francis, Sir, 1848 -1925 (University Press, 1895)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University Press, 1923)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University Press, 1920)

Practical plant biochemistry - Onslow, Muriel Wheldale 1880 -1932 (University press, 1920)

Prehistoric Europe : a geological sketch - Darwin, Charles, 1809 -1882 (Edward Stanford, 1881)

Price 1951 list - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (John M. Eisler Nurseries, 1951)

Price list : 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Evergreen Nurseries of Berlin, Penna, 1929)

Price list : 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Evergreen Nurseries of Berlin, Penna, 1930)

Price list : 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Evergreen Nurseries of Berlin, Penn'a, 1932)

Price list, 1933 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Outpost Nurseries, 1933)

Price list, 1949 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (John M. Eisler Nurseries, 1949)

Price list, 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (John M. Eisler Nurseries, 1950)

Price list and descriptive catalogue - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Barteldes & Co, 1899)

Price list and descriptive catalogue of Barteldes & Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Barteldes & Co, 1897)

Price list and descriptive catalogue of F. Barteldes & Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Barteldes & Co, 1895)

Price list and descriptive catalogue of F. Barteldes & Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Kansas Seed House, 1898)

Price list and descriptive catalogue of F. Barteldes & Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Barteldes & Co, 1896)

Price list and descriptive catalogue of F. Barteldes & Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Barteldes & Co, 1893)

Price list : fall 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westcott Nursery Company, 1928)

Price list : fall, 1929 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Westcott Nursery Company, 1929)

Price list, fall 1945–spring 1946 : roses, evergreens, trees, shrubs, herbaceous perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Kohankie & Son, 1945)

Price list, no. 124 : fall 1924-spring 1925 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.E. Ilgenfritz Sons & Co, 1924)

Price list, No. 126 : fall 1926-spring 1927 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.E. Ilgenfritz Sons & Co, 1926)

Price list, No. 130 : fall 1928-spring 1929, 82nd year - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.E. Ilgenfritz Sons & Co, 1928)

Price list [of] trees, shrubs, evergreens, vines, roses, herbaceous perennials : spring 1928 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Henry Kohankie & Son, 1928)

Price list : spring 1947 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oak Park Nurseries, 1947)

Price list : Towson Nurseries, Inc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Towson Nurseries, 1938)

The primaeval world of Switzerland - Heer, Oswald, 1809 -1883 (Longmans, Green, 1876)

Primo resoconto dei risultati della inchiesta ornitologica in Italia ... - Giglioli, Enrico Hillyer, 1845 -1909 (Coi tipi dei successori Le Monnier, 1889)

Prince's annual catalogue of fruit and ornamental trees and plants : cultivated and for sale at the Linnaean Botanic Garden & Nurseries, Flushing, Long Island, near New-York. All orders are to be addressed only to Wm. R. Prince & Co. only, no other resident of Flushing being authorized to receive any orders whatever for this establishment - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1841)

Prince's select catalogue of the unrivaled collection of fruit & ornamental trees and shrubs, vines, creepers, p©onies, &c. : cultivated at the Linn©an Botanic Garden & Nurseries (founded 1732), Flushing, near New-York - Wm. R. Prince & Co. (s.n, 1863)

Prince's Select Descriptive Catalogue of the Unrivaled Collection of Fruit & Ornamental Tree and Shrubs, Vines, Creepers, Paeonies, &c., Cultivated at the Linnaean Botanic Garden and Nurseries, Flushing, Near New York - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1857)

Prince's select descriptive catalogue of the unrivaled collection of fruit & ornamental tree and shrubs, vines, creepers, paeonies, &c - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1856)

Prince’s select catalogue of the unrivaled collection of fruit & ornamental trees and shrubs, vines, creepers, pæonies, &c. : cultivated at the Linnæan Botanic Garden & Nurseries (founded 1732), Flushing, near New-York - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1863)

Prince’s select descriptive catalogue of the unrivaled collection of fruit & ornamental trees and shrubs, vines, creepers, pæonies, &c. : cultivated at the Linnæan Botanic Garden & Nurseries, Flushing, near New York - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1860)

Princeton nurseries : retail price list, 1938 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. ([Flemer's Sons], 1938)

The principal species of wood: their characteristic properties - Snow, Charles H. (Charles Henry), 1863 - (J. Wiley, 1903)

The principal species of wood: their characteristic properties - Snow, Charles H. (Charles Henry), 1863 - (J. Wiley & sons, 1903)

The principal species of wood: their characteristic properties - Snow, Charles H. (Charles Henry), 1863 - (J. Wiley & Sons; [etc., etc.], 1910)

The principal species of wood: their characteristic properties - Snow, Charles H. (Charles Henry), 1863 - (J. Wiley & Sons; [etc., etc.], 1908)

Principles of plant physiology - Raber, Oran, 1893 -1940 (The Macmillan Co, 1938)

Prirodoslovna istraživanja - Jugoslavenska akademija znanosti i umjetnosti. (1916)

Problems of evolution - Headley, F. W. (Frederick Webb), 1856 -1919 (Duckworth, 1900)

Proceedings - Dorset Natural History; Archaeological Society.

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1970)

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1978)

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1980)

Proceedings and transactions of the British Entomological and Natural History Society - British Entomological; Natural History Society. (British Entomological and Natural History Society, 1983)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1935)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1943)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1947)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1953)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1959)

Proceedings and transactions of the South London Entomological & Natural History Society - South London Entomological; Natural History Society (The Society, 1962)

Proceedings - Dorset Natural History and Archaeological Society - Dorset Natural History; Archaeological Society. (1877)

Proceedings of the Bath Natural History and Antiquarian Field Club - Bath Natural History; Antiquarian Field Club. (1894)

Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1945)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1954)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1956)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1960)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1963)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1965)

Proceedings of the Botanical Society of the British Isles - Botanical Society of the British Isles. (1967)

Proceedings of the Bournemouth Natural Science Society - Bournemouth Natural Science Society (1919)