Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania (The Society, 2013)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania (The Society, 2014)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania (The Society, 2017)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania (The Society, 2021)

Papers and proceedings of the Royal Society of Tasmania - Royal Society of Tasmania (The Society, 2022)

Papers on Coccidae or scale insects - United States. Bureau of Entomology. (Government Printing Office, 1908)

Paralogy in cladistic biogeography and analysis of paralogy-free subtrees - Nelson, Gareth J. (American Museum of Natural History, 1996)

Patterns in the structure of mammalian communities - Morris, Douglas W. (Texas Tech University Press, 1989)

Peninsula Field Naturalists' Club Newsletter - Peninsula Field Naturalists' Club (Peninsula Field Naturalists' Club, 2016)

Peninsula Field Naturalists' Club Newsletter - Peninsula Field Naturalists' Club (Peninsula Field Naturalists' Club, 2020)

Peninsula Field Naturalists' Club Newsletter - Peninsula Field Naturalists' Club (Peninsula Field Naturalists' Club, 2023)

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)

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

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

Pflanzengeographie - Diels, Ludwig, 1874 -1945 (G.J. Göschen, 1918)

Pflanzengeographie - Diels, Ludwig, 1874 -1945 (G. J. Göschen, 1908)

Pflanzengeographie - Diels, Ludwig, 1874 -1945 (G.J. Göschen, 1908)

Das Pflanzenreich :regni vegetablilis conspectus - Engler, Adolf, 1844 -1930 (W. Engelmann, 1914)

Die Pflanzenvereine der Magellansländer : nebst einem Beitrage zur Ökologie der magellanischen Vegetation - Dusén, P. (Per), 1855 -1926 (Kungl. boktr. P.A. Norstedt, 1903)

Die Pflanzenwelt - Warburg, Otto, 1859 -1938 (Bibliographisches Institut, 1913)

Die Pflanzenwelt von West-Australien südlich des Wendekreises. Mit einer Einleitung über die Pflanzenwelt Gesamt-Australiens in Grundzügen. Ergebnisse einer im Auftrag der Humboldt-Stiftung der Kgl. Preussischen Akademie der Wissenschaften, 1900-1902 unternommenen Reise - Diels, Ludwig, 1874 -1945 (W. Engelmann, 1906)

Phaeocollybia of Pacific Northwest North America - United States. Bureau of Land Management. (U.S. Department of the Interior, Bureau of Land Management, Salem District, 2008)

Phylogeny, classification, Mesozoic fossils, and biogeography of the Leiinae (Diptera: Mycetophilidae) / Sarah Siqueira Oliveira, Dalton de Souza Amorim - Amorim, Dalton de Souza, 1958 - (American Museum of Natural History, 2021)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1918)

Physis - Sociedad Argentina de Ciencias Naturales. (Asociación Argentina de Ciencias Naturales [etc.], 1921)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2020)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2019)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2021)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2012)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2013)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2016)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2015)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2022)

PhytoKeys - Kress, W. John (Pensoft Publishers, 2023)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1970)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1971)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1972)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1978)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1979)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1985)

Phytologia - Moldenke, Harold N. (Harold Norman), 1909 -1996 (H.A. Gleason and H.N. Moldenke, 1988)

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, 1998)

Phytoneuron (Guy L. Nesom, 2017)

Phytoneuron (Guy L. Nesom, 2020)

El Pino marítimo, o, Pinus maritima - Albert, Federico, 1867 -1928 (Impr. Cervantes, 1907)

Plant geography - Boulger, George Simonds, 1853 -1922 (J. M. Dent & Son, 1912)

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

Plant-geography upon a physiological basis. Translated by W.R. Fisher; rev. and edited by Percy Groom and I.B. Balfour - Schimper, A. F. W. (Andreas Franz Wilhelm), 1856 -1901 (Clarendon Press, 1903)

Plant immigrants - United States. Office of Foreign Seed; Plant Introduction. (Office of Foreign Seed and Plant Introduction, 1918)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1923)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1929)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1934)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1942)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1956)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1958)

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

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1968)

Plant inventory - United States. Agricultural Research Service. (Northeastern Region, Agricultural Research Center-West, 1969)

Plant life - American Plant Life Society. (American Plant Life Society, 1978)

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

Plant lists : Australia, Papua New Guinea, and the United States - Brass, L. J. (Leonard John), 1900 -1971 (1919)

Plant lists, Chile - Barros, Ernesto, 1887 -1954 (1937)

Plant lists : Chile, Argentina, and Peru - Pirión, Anastasio, 1888 -1959 (1930)

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

The Plant world - Plant World Association. (Plant World Association [etc.], 1915)

The Plant world - Plant World Association. (Plant World Association [etc.], 1916)

Les plantes - Faideau, Ferdinand, 1862 -1930? (Larousse, 1922)

Plants & gardens - Brooklyn Botanic Garden. (Brooklyn Botanic Garden, 1990)

Plants in Danger: what do we know? (1986)

Plants of New Zealand - Blackwell, E. W. (Ellen Wright), 1864 -1952 (Whitcombe and Tombs, Ltd, 1906)