Paxton's magazine of botany, and register of flowering plants - Paxton, Joseph, Sir, 1803 -1865 (Orr and Smith [etc.], 1836)

Pehr Kalms Resa till Norra Amerika - Kalm, Pehr, 1716 -1779 (Tidnings & tryckeri-aktiebolagets tryckeri, 1904)

Pennsylvania-German names of trees - Mell, Clayton D. (Clayton Dissinger), 1875 -1945 (Rev. P.C. Croll, 1910)

Pennsylvania trees - Illick, Joseph S. (Joseph Simon), 1884 -1967 (W.S. Ray, State Printer, 1914)

Pennsylvania trees - Illick, Joseph S. (Joseph Simon), 1884 -1967 (W. S. Ray, State Printer, 1915)

Perennials : deciduous trees, flowering shrubs, evergreens, hardy vines, etc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Muller-Sealey Co., Inc, 1924)

Periodical catalogue of fruit and ornamental trees and plants, cultivated at the Highland Nurseries, Newburgh, near New York - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (A. Saul & Co)

Personal narrative of travels to the equinoctial regions of the New continent during the years 1799-1804 - Humboldt, Alexander von, 1769 -1859 (G. Bell, 1877)

Personal narrative of travels to the equinoctial regions of America, during the year 1799-1804 - Humboldt, Alexander von, 1769 -1859 (Bohn, 1852)

Personal narrative of travels to the equinoctial regions of America during the years 1799 - 1804 - Humboldt, Alexander von, 1769 -1859 (George Routledge, 1895)

Pesticides documentation bulletin - National Agricultural Library (U.S.) (National Agricultural Library, U.S. Dept. of Agriculture, #c 1965-1969, 1965)

Pestmegye és tájéka viránya - Gönczy, Pál, 1817 -1892 (Ráth mór Bizománya, 1864)

Peterson Nursery - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Wm. A. Peterson, 1904)

Die Pflanzen des schlesischen Tertiärs - Reimann, H. (Preussische Geologische Landesanstalt, 1919)

Pflanzen-geographie auf physiologischer Grundlage - Schimper, A. F. W. (Andreas Franz Wilhelm), 1856 -1901 (Gustav Fischer, 1908)

Die Pflanzendecke der Erde : populäre Darstellung der Pflanzengeographie für gebildete Naturfreunde - Rudolph, Ludwig, 1813 -1896 (Nicolaische Verlagsbuchhandlung, 1859)

Die Pflanzenfeinde aus der Klasse der Insekten. Ein nach Pflanzenfamilien geordnetes Handbuch sämmtlicher auf den einheimischen Pflanzen bisher beobachteten Insekten zum Gebrauch für Entomologen, Insektensammler, Botaniker, Land- und Forstwirthe und Gartenfreunde - Kaltenbach, J. H. (Johann Heinrich), 1807 -1876 (J. Hoffmann, 1874)

Die Pflanzenwelt Norwegens. Ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (A.W. Brögger, 1873)

Die Pflanzenwelt Norwegens : ein Beitrag zur Natur- und Culturgeschichte Nord-Europas - Schübeler, F. C. (Frederik Christian), 1815 -1892 (1873)

Pfund's dependable trees, shrubs, perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pfund Nursery Co, 1922)

Pharmaceutical journal and transactions - Pharmaceutical Society of Great Britain. (J. & A. Churchill, 1881)

Philadelphia Medical and Physical Journal (1806)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1911)

The Philippine journal of science - Philippines. National Science Development Board. (Bureau of Science, 1906)

Photomicrographie en cent tableaux pour projection - Girard, Jules, 1825 -1902 (Les Mondes, 1872)

Photoperiodism and related phenomena in plants and animals; proceedings - Withrow, Robert B. 1904 -1958 (1959)

Photosynthesis - Spoehr, H. A. (Herman Augustus), 1885 -1954 (The Chemical catalog company, inc, 1926)

Physiological botany; I. Outlines of the histology of phænogamous plants. II. Vegetable physiology - Goodale, George L. (George Lincoln), 1839 -1923 (American Book Co, 1885)

Phytochemie - Rochleder, Friedrich, 1819 -1874 (W. Engelmann, 1854)

Phytogeographic survey of North America. A consideration of the phytogeography of the North American continent, including Mexico, Central America and the West Indies, together with the evolution of North American plant distribution - Harshberger, John W. (John William), 1869 -1929 (W. Engelmann, 1911)

Phytogeography of Nebraska. 1. General survey by Roscoe Pound and Frederic E. Clements - Clements, Frederic E. (Frederic Edward), 1874 -1945 (Published by the Seminar, 1900)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1965)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1981)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1982)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1983)

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

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1997)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1998)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2006)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2007)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2017)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2018)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2019)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2020)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 2022)

Phytoneuron (Guy L. Nesom, 2012)

Phytoneuron (Guy L. Nesom, 2013)

Phytoneuron (Guy L. Nesom, 2014)

Phytoneuron (Guy L. Nesom, 2015)

Phytoneuron (Guy L. Nesom, 2016)

Phytoneuron (Guy L. Nesom, 2017)

Le piante fanerogame della Svizzera insubrica : enumerate secondo il methodo decandolliano - Favrat, Louis, 1827 -1893 (H. Georg, 1890)

The pinetum: being a synopsis of all the coniferous plants at present known, with descriptions, history and synonyms, and a comprehensive systematic index - Gordon, George, 1806 -1879 (H.G. Bohn [etc.], 1880)

P.J. Berckmans Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fruitland Nurseries, 1912)

P.J. Berckmans Co - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fruitland Nurseries, 1916)

P.J. Berckmans Co., Inc - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fruitland Nurseries, 1915)

P.J. Berckmans Co. Incorporated - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fruitland Nurseries, 1917)

P.J. Berckmans Co., Incorporated - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Fruitland Nurseries, 1914)

The plankton of the Illinois river, 1894-1899, with introductory notes upon the hydrography of the Illinois river and its basin - Kofoid, Charles A. (Charles Atwood), 1865 -1947 (1903)

Plans de jardins dans le goût anglais & instructions dans l'art de distribuer & planter de petits terrains - Angelo, G. N. (Chés Frideric Brummer, 1798)

A plant-disease survey in the vicinity of San Antonio, Texas - United States. Bureau of Plant Industry. (Govt. Print. Off, 1912)

Plant ecology - McDougall, W. B. (Walter Byron), 1883 - (Lea & Febiger, 1941)

Plant-geography upon a physiological basis - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1903)

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 life of Alabama : an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown Printing Co, 1901)

Plant life of Alabama, an account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state - Mohr, Charles (Charles Theodore), 1824 -1901 (Brown printing co, 1901)

Plant life of Alabama. An account of the distribution, modes of association, and adaptations of the flora of Alabama, together with a systematic catalogue of the plants growing in the state. Prepared in cooperationwith the Geological Survey of Alabama - Mohr, Charles (Charles Theodore), 1824 -1901 (Govt. Print. Off, 1901)

The plant life of Hartsville, S.C - Coker, William Chambers, 1872 -1953 ([Pee Dee Historical Assn.], 1912)

The plant life of Maryland - Shreve, Forrest, 1878 -1950 (Johns Hopkins Press, 1910)

Plant life through the ages : a geological and botanical retrospect - Seward, A. C. (Albert Charles), 1863 -1941 (Hafner, 1933)

Plant list of Waterloo County - Montgomery, F. H. (Frederick Howard), 1902 - (1943)

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 physiology; a textbook for colleges and universities - Anderson, Donald Benton, 1899 - (D. Van Nostrand Company, inc, 1939)

Plant responses to salinity : a supplement to an indexed bibliography - Francois, L. E. (National Technical Information Service], 1985)

The plant societies of Chicago and its vicinity - Cowles, Henry Chandler, 1869 -1939 (The Geographic Society of Chicago, 1901)

Plant this fall, trees, shrubs, fruits & flowers : Victory planters guide for fall - winter 1943 and spring 1944 - Harrison's Nurseries (Berlin, Md.) (Harrison Brothers, 1943)

The Plant world - Plant World Association. (Plant World Association [etc.], 1897)

The Plant world - Plant World Association. (Plant World Association [etc.], 1905)

The Plant world - Plant World Association. (Plant World Association [etc.], 1907)

The Plant world - Plant World Association. (Plant World Association [etc.], 1910)

The Plant world - Plant World Association. (Plant World Association [etc.], 1911)

The Plant world - Plant World Association. (Plant World Association [etc.], 1912)

The Plant world - Plant World Association. (Plant World Association [etc.], 1914)

The Plant world - Plant World Association. (Plant World Association [etc.], 1917)

The Plant world - Plant World Association. (Plant World Association [etc.], 1919)

Plantae Lindheimerianae : an enumeration of F. Lindheimer's collection of Texan plants, with remarks and descriptions of new species, etc - Gray, Asa, 1810 -1888 (Printed by Freeman and Bolles, 1845)

Plantae Plandomenses; or, A catalogue of the plants growing spontaneously in the neighbourhood of Plandome, the country residence of Samuel L. Mitchill - Eddy, Caspar Wistar, 1790 -1828 (1807)