Plants, seeds, and currents in the West Indies and Azores; the results of investigations carried out in those regions between 1906 and 1914 - Guppy, H. B. (Henry Brougham), 1854 -1926 (Williams and Norgate, 1917)

The Plough, the loom and the anvil - Skinner, John S. (John Stuart), 1788 -1851 (J.S. Skinner, 1848)

The Plough, the loom, and the anvil (J.S. Skinner & Son], 1848)

Poatkowé rostlinoslowí - Presl, Jan Svatopluk, 1791 -1849 (W kommissí u Kronbergra a iwnáe, 1848)

A pocket botanical dictionary; comprising the names, history, and culture of all plants known in Britain; with a full explanation of technical terms - Lindley, John, 1799 -1865 (J. Andrews, 1840)

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

Popular Science Review (1866)

Popular Science Review (1872)

Populäre Botanik oder gemeinfassliche Anleitung zum Studium der Pflanze und des Pflanzenreiches. Zugleich ein Handbuch zum Bestimmen der Pflanzen auf Excursionen - Schmidlin, Eduard, 1808? -1890 (Krais & Hoffmann, 1857)

Portefeuille des horticulteurs (J.-B. Gros, Rue du Foin Saint-Jacques, 18, 1847)

Porter-Walton : [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1917)

Porter-Walton Company : [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1918)

Porter-Walton Company : [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1919)

Porter-Walton's 1924 seed & nursery book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1924)

Porter-Walton's seed and nursery book for 1920 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1920)

Porter-Walton's seed and nursery book for 1920-21 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Porter-Walton Co, 1920)

Possibilities of the sweet potato in Macon County, Alabama - Carver, George Washington, 1864 -1943 (Experiment Station, Tuskegee Normal and Industrial Institute, 1915)

Possibilities of the sweet potato in Macon County, Alabama - Carver, George Washington, 1864 -1943 (Experiment Station, Tuskegee Normal and Industrial Institute, 1910)

Le potager d'un curieux : Histoire, culture & usages de 250 plantes comestibles, peu connues ou inconnues - Bois, D. (Désiré), 1856 -1946 (Librairie agricole de la Maison rustique, 1899)

The potato, how to cultivate, chemistry of the potato (B.K. Bliss and Sons, 1878)

The potato : how to cultivate, chemistry of the potato, premium crops and how to grow them - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (B.K. Bliss & Sons, 1878)

A practical flora for schools and colleges - Willis, Oliver R. (Oliver Rivington), 1815 -1902 (American Book Co, 1894)

A preliminary check list of the cryptogams and phanerogams in the vicinity of Saint Louis, Missouri - Engelmann Botanical Club. Check List Committee. (The Club, 1911)

A preliminary list of Nicaraguan plant diseases - Stevenson, John A. (John Albert), 1890 -1979 (Plant Disease Epidemics and Identification Section, Agricultural Research Service, United States Department of Agriculture, 1957)

Preparation and care of a garden for vegetables - Brumley, Danile Joseph, 1865 - (The Wagner and Hanson co, 1920)

Price list 1922 : Simon's perfection seeds for market gardeners - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.N. Simon & Son, 1922)

Price list 1923 : Simon's perfection seeds for market gardeners - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (I.N. Simon & Son, 1923)

Price list for 1920 : descriptive catalogue mailed upon request - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Co, 1920)

Price list of hardy trees, evergreens, vines, shrubs, roses, perennials, fruits, etc. for 1921 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Morris Nursery Company, 1921)

Price list of plants, seeds, trees and shrubs - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Nanz & Neuner Co., Inc, 1915)

Priced catalogue for ... - Elliott, B.A. Company. (B.A. Elliott Co, 1892)

Priced catalogue for ... - Elliott, B.A. Company. (B.A. Elliott Co, 1893)

Primitiae florae costaricensis - Durand, Th. (Théophile), 1855 -1912 (Jardin botanique de l'état, 1891)

Primitiae florae essequeboensis adjectis descriptionibus centum circiter stirpium novarum, observationibusque criticis - Meyer, G. F. W. (Georg Friedrich Wilhelm), 1782 -1856 (Sumptibus H. Dieterich, 1818)

Prince & Co.'s catalogue of hardy shrubs and vines, cultivated at the Linnaean botanic gardens, Flushing, N.Y - Wm. R. Prince & Co. (Wm. R. Prince & Co)

Prince's descriptive catalogue of foreign and native grape vines : for gardens, graperies, and vineyards, with remarks on their culture - Wm. R. Prince & Co. (s.n, 1859)

Prince's descriptive catalogue of foreign and native grape vines : for gardens, graperies, and vineyards, with remarks on their culture - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1859)

Prince's descriptive catalogue of select varieties of strawberries, comprised in their unrivaled collection - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1859)

Prince's select catalogue of the unrivaled collection of bulbous flowers of every class, and of dahlias, chinese tree, & herbace - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1857)

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 catalogue of the unrivaled collection of roses, carnations, chrysanthemums, phlox, iris, double sweet williams, hollyhocks - Wm. R. Prince & Co. (Baker and Godwin, 1857)

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 descriptive catalogue of the unrivaled collection of fruit & ornamental trees and shrubs, vines, creepers, p©onies, &c. : cultivated at the Linn©an Botanic Garden & Nurseries, Flushing, near New York - Wm. R. Prince & Co. (s.n, 1860)

Prince's special supplementary catalogue of bulbous and tuberous flowers, and of other new and rare species, comprising the most choice and splendid varieties - Wm. R. Prince & Co. (Wm. R. Prince & Co., 1855, 1855)

Prince’s Linæan Botanic Garden and Nurseries, founded 1723, William R. Prince & Co., proprietors, Flushing, Long Island near New-York - Wm. R. Prince & Co. (Wm. R. Prince & Co, 1857)

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)

The principal navigations, voyages, traffiques & discoveries of the English nation made by sea or over-land to the remote and farthest distant quarters of the earth at any time within the compasse of these 1600 yeeres - Hakluyt, Richard, 1552? -1616 (J. MacLehose and sons, 1904)

Principia botanica: or, a concise and easy introduction to the sexual botany of Linnaeus ... - Linné, Carl von, 1707 -1778 (Printed by Allin and co. and sold by G. G. J. and J. Robinson, London, 1787)

Principia botanica: or, A concise and easy introduction to the sexual botany of Linnaeus ... Arranged in a tabular form, under each class and order; and digested alphabetically under several generic distinctions. Together with three indexes ... Also a table of several vegetable drugs not in the indexes ... - Darwin, Robert Waring, 1724 -1816 (Printed and sold by M. Hage; [etc., etc.], 1810)

The principles of agronomy; a text-book of crop production for high-schools and short-courses in agricultural colleges - Harris, Franklin Stewart, 1884 -1960 (The Macmillan company, 1915)

The principles of plant-teratology - Worsdell, Wilson Crosfield (The Ray Society, 1915)

The principles of vegetable-gardening - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan company; [etc., etc.], 1901)

The principles of vegetable-gardening - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan company, 1921)

The principles of vegetable-gardening - Bailey, L. H. (Liberty Hyde), 1858 -1954 (The Macmillan Company, 1912)

Proceedings and transactions of the Nova Scotian Institute of Natural Science - Nova Scotian Institute of Natural Science. (Nova Scotian Institute of Natural Science, 1870)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1867)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1889)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1913)

Proceedings of the Academy of Natural Sciences of Philadelphia - Academy of Natural Sciences of Philadelphia. (Academy of Natural Sciences of Philadelphia, 1841)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1865)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1902)

Proceedings of the American Academy of Arts and Sciences - American Academy of Arts; Sciences. (Metcalf and Co, 1915)

Proceedings of the annual convention of the society of American Florists - Society of American Florists; Ornamental Horticulturists. (Society of American Florists and Ornamental Horticulturalists, 1885)

Proceedings of the Boston Society of Natural History - Boston Society of Natural History. (Boston Society of Natural History, 1907)

Proceedings of the Bristol Naturalists' Society - Bristol Naturalists' Society (Bristol, England) (Bristol Naturalists' Society, 1885)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1952)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1951)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1953)

Proceedings of the California Academy of Sciences, 4th series - California Academy of Sciences (California Academy of Sciences, 1991)

Proceedings of the Entomological Society of Washington - Entomological Society of Washington (Entomological Society of Washington, 2007)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1915)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1914)

Proceedings of the Indiana Academy of Science - Indiana Academy of Science. ([s.n.], 1922)

Proceedings of the Linnean Society of London - Linnean Society of London. (Published for the Linnean Society of London by Academic Press [etc.], 1855)

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 Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1886)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1902)

Proceedings of the Linnean Society of New South Wales - Linnean Society of New South Wales. (Linnean Society of New South Wales, 1921)

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1859)

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

Proceedings of the Royal Horticultural Society London (Royal Horticultural Society, 1865)

The Proceedings of the Royal Society of Queensland - Royal Society of Queensland. (Royal Society of Queensland], 1927)

Proceedings of the Scientific Association of Trinidad - Scientific Association of Trinidad. (1864)

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.], 1932)

Proceedings of the Zoological and Acclimatisation Society of Victoria, and report of the annual meeting of the society - Zoological; Acclimatisation Society of Victoria. (F. A. Masterman, 1872)

Prodromus florae hispanicae, seu synopsis methodica omnium plantarum in Hispania - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1870)

Prodromus florae Hispanicae :seu Synopsis methodica omnium plantarum in Hispania, sponte nascentium vel frequentius cultarum quae innotuerunt - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1870)

Prodromus florae hispanicae, seu synopsis methodica omnium plantarum in Hispania - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1880)

Prodromus florae Hispanicae :seu Synopsis methodica omnium plantarum in Hispania, sponte nascentium vel frequentius cultarum quae innotuerunt - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1880)

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

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, 1845)

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, 1846)

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, 1873)

Productive plant husbandry; a text-book for high schools, including plant propagation, plant breeding, soils, field crops gardening, fruit growing, forestry, insects, plant diseases and farm management - Davis, Kary Cadmus, 1867 -1936 (J.B. Lippincott company, 1917)

Productive vegetable growing - Lloyd, John William, 1876 - (J.B. Lippincott Company, 1914)

Programme du cours d'histoire naturelle médicale professé à la Faculté de médecine de Paris 3ème partie Etude spéciale des plantes employées en médecine - Baillon, H. (Henri), 1827 -1895 (F. Savy, 1878)