List of botanists by author abbreviation (P)

A–O
To find entries for A–O, use the table of contents above.

P

 * P.Aa – Pierrot Van der Aa (fl. 2022)
 * Pabst – Guido Frederico João Pabst (1914–1980)
 * Paclt – Jiří Paclt (1925–2015)
 * P.A.Collier – Philip A. Collier (fl. 2017)
 * P.A.Cox – Paul Alan Cox (born 1953)
 * Paczk. – Grazyna Paczkowska (born 1965)
 * P.A.Dang. – Pierre Augustin Dangeard (1862–1947)
 * Pagan – Francisco Mariano Pagan (1896–1942)
 * P.A.Gilbert – Percy Albert Gilbert (1883–1960)
 * Paine – John Alsop Paine (1840–1912)
 * Painter – William Hunt Painter (1835–1910)
 * Palassou – Pierre Bernard Palassou (1745–1830)
 * Paláu – Antonio Palau y Verdera (1734–1793)
 * Palez. – Philippe de Palézieux (1871–1957)
 * Palib. – Ivan Vladimirovich Palibin (1872–1949)
 * Pall. – Peter Simon von Pallas (1741–1811)
 * Palla – Eduard Palla (1864–1922)
 * Pallith. – Joseph Pallithanam (1915–1984)
 * P.Allorge – Pierre Allorge (1891–1944)
 * Palm – Björn Torvald Palm (1887–1956)
 * Palmberg – Johannes Olai Palmberg (1640–1691)
 * Palmer – Edward Palmer (1829–1911)
 * Palmgr. – Alvar Palmgren (1880–1960)
 * Pamp. – Renato Pampanini (1875–1949)
 * Pamplin – William Pamplin (1806–1899)
 * Pancher – Jean Armand Isidore Pancher (1814–1877)
 * Pančić – Josif Pančić (1814–1888)
 * Pandé – S. K. Pandé (1899–1960)
 * Pandeir. – Mariana Sofia Pandeirada (born 1990)
 * Pander – Heinz Christian Pander (1794–1865)
 * Pando – Francisco Pando (born 1962)
 * Panero – José L. Panero (born 1959)
 * Panfet – Cristina Mercedes Panfet Valdés (born 1957)
 * Pangalo – Konstantin Ivanovič Pangalo (1883–1965)
 * Paniagua – Narel Y. Paniagua-Zambrana (born 1973)
 * Panigrahi – Gopinath Panigrahi (1924–2004)
 * Panizzi – Francesco Panizzi (1817–1893)
 * Panjutin – Platon Sergeevich Panjutin (1889–1946)
 * Pankow – Helmut Pankow (1929–1996)
 * Pannell – Caroline M. Pannell (fl. 1982)
 * Panov – P. P. Panov (born 1932)
 * Pansche – Adolf Pansche (1841–1887)
 * Pant. – Jószef Pantocsek (1846–1916)
 * Pantaz. – Andriana Pantazidou (born 1955)
 * Panter – Jacqueline Anne Panter (born 1945)
 * Panthaki – Dhun Phiroze Panthaki (born 1933)
 * Pantl. – Robert Pantling (1856–1910)
 * Panțu – Zacharia C. Panțu (1866–1934)
 * Panz. – Georg Wolfgang Franz Panzer (1755–1829)
 * Paol. – Giulio Paoletti (1865–1941)
 * Papan. – Konstantinos Papanicolaou (born 1947)
 * Pappe – Karl Wilhelm Ludwig Pappe (1803–1862)
 * Parijs – J. P. Parijs
 * Paris – Jean Édouard Gabriel Narcisse Paris (1827–1911)
 * Parish – Samuel Bonsall Parish (1838–1928)
 * Parkinson – Sydney Parkinson (–1771)
 * Parl. – Filippo Parlatore (1816–1877)
 * Parm. – Antoine Auguste Parmentier (1737–1813)
 * Parn. – Richard Parnell (1810–1882)
 * Parodi – Lorenzo Raimundo Parodi (1895–1966)
 * Parr-Sm. – Geoffrey A. Parr-Smith (fl. 1984)
 * Parry – Charles Christopher Parry (1823–1890)
 * Pascher – Adolf Pascher (1881–1945)
 * Pasq. – Giuseppe Antonio Pasquale (1820–1893)
 * Pass. – Giovanni Passerini (1816–1893)
 * Passarge – Otto Karl Siegfried Passarge (1867–1958)
 * Passy – Antoine François Passy (1792–1873)
 * Pasteur – Louis Pasteur (1822–1895)
 * Pastore – Ada I. Pastore (1906–1952)
 * Pat. – Narcisse Théophile Patouillard (1854–1926)
 * Patel – M. K. Patel (fl. 1949)
 * Paterson – William Paterson (1755–1810)
 * Paton – Jean Annette Paton (born 1929)
 * Patraw – Pauline Mead Patraw (fl. 1936)
 * Patrin – Eugène Louis Melchior Patrin (1742–1815)
 * Patt. – Harry Norton Patterson (1853–1919)
 * Pau – Carlos Pau (1857–1937)
 * Paul G.Wilson – Paul Graham Wilson (born 1928)
 * Paulsen – Ove Paulsen (1874–1947)
 * Paunero – Elena Paunero Ruiz (1906–2009)
 * Paust – Susan Paust (born 1949)
 * Pav. – José Antonio Pavón Jiménez (1754–1844)
 * Pavlick – Leon E. Pavlick (1939–2003)
 * Pavlov – Nikolai Vasilievich Pavlov (1893–1971)
 * Pavlova – Nina Mikhailovna Pavlova (1897–1973)
 * Pavol. – Angiolo Ferdinando Pavolini (fl. 1908)
 * Pawł. – Bogumił Pawłowski (1898–1971)
 * Pax – Ferdinand Albin Pax (1858–1942)
 * Paxton – Joseph Paxton (1803–1865)
 * Payens – Joannes Petrus Dominicus Wilhelmus Payens (born 1928)
 * Payer – Jean-Baptiste Payer (1818–1860)
 * Payson – Edwin Blake Payson (1893–1927)
 * Pazij – Vera Kondratyevna Pazij (1909–1992)
 * P.B.Adams – P. B. Adams (fl. 1978)
 * P.Balzer – Peter Balzer (fl. 2011)
 * P.Beauv. – Ambroise Marie François Joseph Palisot de Beauvois (1752–1820)
 * P.Biju – Punnakot Biju (born 1975)
 * P.Browne – Patrick Browne (1720–1790)
 * P.Candargy – Paléologos C. Candargy (born 1870)
 * P.C.Boyce – Peter Charles Boyce (born 1964)
 * P.C.de Jong – Piet C. de Jong (fl. 1976)
 * P.Chai – Paul P. K. Chai (fl. 1996)
 * P.C.Kanjilal – Praphulla Chandra Kanjilal (1886–1972)
 * P.C.Li – Pei Chun Li (fl. 1981)
 * P.C.Pant – P. C. Pant (born 1936)
 * P.Cruchet – Paul Cruchet (1875–1964)
 * P.C.S.Kumar – P.C. Suresh Kumar (born 1953)
 * P.Daniel – Pitchai Daniel (born 1943)
 * P. de B. – Ambroise Marie François Joseph Palisot de Beauvois (1752–1820)
 * P.de la Varde – Robert André Léopold Potier de la Varde (1878–1961)
 * P.Delforge – Pierre Delforge (born 1945)
 * P.D.Orton – Peter Darbishire Orton (1916–2005)
 * P.D.Sell – Peter Derek Sell (1929-2013)
 * P.D.Sørensen – Paul Davidson Sørensen (born 1934)
 * Pearl – Raymond Pearl (1879–1940)
 * Pearse – Arthur Sperry Pearse (1877–1956)
 * Pearson – William Henry Pearson (1849–1923)
 * Pease – Arthur Stanley Pease (1881–1964)
 * Peattie – Donald C. Peattie (1898–1964)
 * P.E.Barnes – P.E. Barnes (fl. 1931)
 * P.E.Berry – Paul Edward Berry (born 1952)
 * Peck – Charles Horton Peck (1833–1917)
 * Peckham – Ethel Anson Peckham (1879–1965)
 * Peckoit – Gustav Peckoit (1861–1923)
 * Peckolt – Theodor Peckolt (1822–1912)
 * Pěčková – Milena Pěčková (fl. 1990)
 * Peckover – Ralph Peckover (fl. 1992)
 * Pedersen – Troels Myndel Pedersen (1916–2000)
 * Pedley – Leslie Pedley (1930–2018)
 * Pedro – José Gomes Pedro (1915–2010)
 * Peebles – Robert Hibbs Peebles (1900–1955)
 * P.E.Gibbs – Peter Edward Gibbs (born 1938)
 * Peiger – Maroš Peiger (fl. 2024)
 * Peirce – George James Peirce (1868–1954)
 * Peiris – Gayan Prasanga Peiris (fl. 2023)
 * Pellegr. – François Pellegrin (1881–1965)
 * Pelloe – Emily Harriet Pelloe (1878–1941)
 * Pellow – Belinda Pellow (born 1956)
 * Pelser – Pieter B. Pelser (fl. 2005)
 * Penh. – David Pearce Penhallow (1854–1910)
 * Penn. – Leigh Humboldt Pennington (1877–1929)
 * Penneys – Darin S. Penneys (fl. 2004–2018)
 * Pennant – Thomas Pennant (1726–1798)
 * Pennell – Francis Whittier Pennell (1886–1952)
 * Penny – George Penny (died 1838)
 * Penz. – Albert Julius Otto Penzig (1856–1929)
 * Pépin – Pierre Denis Pépin (c. 1802–1876)
 * Perch-Nielsen – Katharina Perch-Nielsen
 * Percival – John Percival (1863–1949)
 * Perdue – Robert Edward Perdue Jr. (1924–2011)
 * Perkins – Janet Russell Perkins (1853–1933)
 * Perktold – Josef Anton Perktold (1804–1870)
 * Perleb – Karl Julius Perleb (1794–1845)
 * Perr. – George Samuel Perrottet (1793–1870)
 * Perrie – Leon R. Perrie (fl. 2003)
 * Perrier – Alfred Perrier (1809–1866)
 * Perrine – Henry Perrine (1797–1840)
 * Perry – Matthew Calbraith Perry (1794–1858)
 * Pers. – Christiaan Hendrik Persoon (1761–1836)
 * Perss. – Nathan Petter Herman Persson (1893–1978)
 * Perty – Josef (Joseph) Anton Maximillian Perty (1804–1884)
 * Peschkova – Galina A. Peschkova (1930–2018)
 * Petagna – Vincenzo Petagna (1734–1810)
 * Pételot – Paul Alfred Pételot (1885–after 1940)
 * Peter – (Gustav) Albert Peter (1853–1937)
 * Peter B.Adams – Peter Barry Adams (fl. 1995)
 * Peter G.Wilson – Peter Gordon Wilson (born 1950)
 * Peterm. – Wilhelm Ludwig Petermann (1806–1855)
 * Peters – Wilhelm Karl Hartwig Peters (1815–1883)
 * Petoe – Peter Petoe (fl. 2018)
 * Petr. – Franz Petrak (1886–1973)
 * Petrie – Donald Petrie (1846–1925)
 * Petrov – Vsevolod Alexeevič Petrov (1896–1955)
 * Petrovič – Sava Petrovič (1839–1889)
 * Petry – Arthur Petry (1858–1932)
 * Petz. – Carl Edward Adolph Petzold (1815–1891)
 * Peyerimh. – Paul de Peyerimhoff de Fontenelle (1873–1957)
 * Peyr. – Johann Joseph Peyritsch (1835–1889)
 * Pfahl – Jay Charles Pfahl (born 1953)
 * Pfeff. – Wilhelm Pfeffer (1845–1920)
 * Pfeiff. – Louis (Ludwig) Karl Georg Pfeiffer (1805–1877)
 * Pfeil – Friedrich Wilhelm Leopold Pfeil (1783–1859)
 * Pfennig – Horst Pfennig (1933–1994)
 * P.F.Hunt – Peter Francis Hunt (1936–2013)
 * Pfiester – Lois Ann Pfiester (1936–1992)
 * Pfitzer – Ernst Hugo Heinrich Pfitzer (1846–1906)
 * P.F.Maycock – Paul F. Maycock (1930–2012)
 * Pfosser – Martin Pfosser (fl. 2003)
 * P.Fourn. – Paul Victor Fournier (1877–1964)
 * P.F.Stevens – Peter F. Stevens (born 1944)
 * P.Geissler – Patricia Geissler (1947–2000)
 * P.G.Neish – Peter G. Neish (fl. 2000)
 * P.H.Allen – Paul H. Allen (1911–1963)
 * P.Halliday – Patricia Halliday (1930–2019)
 * P.H.Davis – Peter Hadland Davis (1918–1992)
 * P.Hein – Peter Hein (born 1962)
 * P.H.Hô – Pham-Hoàng Hô (1929–2017)
 * Phil. – Rodolfo Amando Philippi (1808–1904)
 * Philcox – David Philcox (1926–2003)
 * Philippe – Xavier Philippe (1802–1866)
 * Philipson – William Raymond Philipson (1911–1997)
 * Phillippe – Loy R. Phillippe (fl. 1989)
 * Phillipps – Anthea Phillipps (fl. 1982)
 * Phipps – Constantine John Phipps (1744–1792)
 * Phoebus – Philipp Phoebus (1804–1880)
 * P.H.Raven – Peter Hamilton Raven (born 1936)
 * Phukan – Sandhyajyoti Phukan (born 1950)
 * P.H.Weston – Peter Henry Weston (born 1956)
 * Pichon – Marcel Pichon (1921–1954)
 * Pickering – Charles Pickering (1805–1878)
 * Pickersgill – Barbara Pickersgill (born 1940)
 * Pickett – Fermen Layton Pickett (1881–1940)
 * Pickford – Grace Evelyn Pickford (1902–1986)
 * Pic.Serm. – Rodolfo Emilio Giuseppe Pichi Sermolli (1912–2005)
 * Pierrat – Dominique Pierrat (1820–1893)
 * Pierre – Jean Baptiste Louis Pierre (1833–1905)
 * P.I.Forst. – Paul Irwin Forster (born 1961)
 * Pignatti – Sandro Pignatti (born 1930)
 * Pigott – Donald Pigott (1928–2022)
 * Piippo – Sinikka Piippo (born 1955)
 * Pilát – Albert Pilát (1903–1974)
 * Pilg. – Robert Knud Friedrich Pilger (1876–1953)
 * Pillans – Neville Stuart Pillans (1884–1964)
 * Pilous – Zdeněk Pilous (1912–2000)
 * P.I.Mao – Pin I Mao (born 1925)
 * Pimentel – Reynold B. Pimentel (fl. 2017)
 * Pimenov – Michael Georgievich Pimenov (born 1937)
 * Pinchot – Gifford Pinchot (1865–1946)
 * Pinkava – Donald John Pinkava (1933–2017)
 * Piper – Charles Vancouver Piper (1867–1926)
 * Pipoly – John J. Pipoly III (born 1955)
 * Pirani – José Rubens Pirani (born 1958)
 * Piré – Louis Alexandre Henri Joseph Piré (1827–1887)
 * Pires – João Murça Pires (1916–1994)
 * Pires-O'Brien – Maria Joaquina Pires-O'Brien (born 1953)
 * Pirone – Pascal Pompey Pirone (1907–2003)
 * Pirotta – Pietro Romualdo Pirotta (1853–1936)
 * Pisano – Edmundo Pisano (1919–1997)
 * Piso – Willem (Guilielmus, Guilherme) Piso (Pies) (1611–1678)
 * Pišút – Ivan Pišút (1935-2017)
 * Pit. – Charles-Joseph Marie Pitard (1873–1927)
 * Pitcher – Zina Pitcher (1797–1872)
 * Pittier – Henri François Pittier (1857–1950)
 * P.J.Adey – Patricia J. Adey (born 1936)
 * P.James – Peter Wilfred James (1930–2014)
 * P.J.Bergius – Peter Jonas Bergius (1730–1790)
 * P.J.Braun – Pierre Josef Braun (born 1959)
 * P.J.Cribb – Phillip James Cribb (born 1946)
 * P.J.H.Hurter – P.J.H. Hurter (fl. 1995)
 * P.J.Lang – Peter J. Lang (born 1955)
 * P.J.L.Dang. – Pierre Jean Louis Dangeard (1895–1970)
 * P.J.Müll. – Philipp Jakob Müller (1832–1889)
 * P.J.Spence – Philip John Spence (born 1940)
 * P.Karst. – Petter Adolf Karsten (1834–1917)
 * P.K.Endress – Peter Karl Endress (born 1942)
 * P.K.Holmgren – Patricia Kern Holmgren (born 1940)
 * P.K.Hsiao – Pei Ken Hsiao (born 1931)
 * P.K.Sarkar – Priyabrata K. Sarkar (born 1929)
 * P.Kumm. – Paul Kummer (1834–1912)
 * P.Küpfer – Philippe Küpfer (born 1942)
 * Planch. – Jules Émile Planchon (1823–1888)
 * Planchuelo – Ana María Planchuelo (born 1945)
 * Playford – Geoffrey Playford (fl. 1981)
 * Plaz – Anton Wilhelm Plaz (1708–1784)
 * Plée – Auguste Plée (1787–1825)
 * Plowman – Timothy Charles Plowman (1944–1989)
 * Plowr. – Charles Bagge Plowright (1849–1910)
 * P.L.Perry – Pauline Lesley Perry (born 1927)
 * Pluk. – Leonard Plukenet (1642–1706)
 * Plum. – Charles Plumier (1646–1704)
 * Plummer – Sara Allen Plummer (1836–1923)
 * Plumst. – Edna Pauline Plumstead (1903–1989)
 * P.MacGill. – Paul Howard MacGillivray (1834–1895)
 * P.Martin – Paul Martin (1923–1982)
 * P.M.Gilmour – Phil M. Gilmour (fl. 1987)
 * P.Morris – Patrick Francis Morris (1896–1974)
 * P.N.Fraser – Patrick Neill Fraser (1830–1905)
 * P.N.Johnson – Peter Nevill Johnson (born 1946)
 * Pobed. – Evgeniia (Eugenia) Georgievna Pobedimova (1898–1973)
 * P.O'Byrne – Peter O'Byrne (1955–2018)
 * Pocock – Mary Agard Pocock (1886–1977)
 * Pócs – Tamás Pócs (born 1933)
 * Podger – Francis Denis Podger (born 1933)
 * Podp. – Josef Podpěra (1878–1954)
 * Poederlé – Eugene Josef Charles Gilain Hubert d'Olmen Poederlé (1742–1813)
 * Poelln. – Karl von Poellnitz (1896–1945)
 * Poelt – Josef Poelt (1924–1995)
 * Poepp. – Eduard Friedrich Poeppig (1798–1868)
 * Poggenb. – Justus Ferdinand Poggenburg I (1840–1893)
 * Pohl – Johann Baptist Emanuel Pohl (1782–1834)
 * Pohle – Christian Nikolai Richard Pohle (1869–1926)
 * Poir. – Jean Louis Marie Poiret (1755–1834)
 * Poiss. – Henri Louis Poisson (1877–1963)
 * Poit. – Pierre Antoine Poiteau (1766–1854)
 * Poivre – Pierre Poivre (1719–1786)
 * Pojar – Jim Pojar (fl. 2001)
 * Pojark. – Antonina Ivanovna Pojarkova (1897–1980)
 * P.O.Karis – Per Ola Karis (born 1955)
 * Pokle – Dileep Sadashivrao Pokle (born 1950)
 * Pokorny – Alois Pokorny (1826–1886)
 * Polatschek – Adolf Polatschek (1932–2015)
 * Pole-Evans – Illtyd (Iltyd) Buller Pole-Evans (1879–1968)
 * Polhorský – Adam Polhorský (fl. 2020)
 * Poljakov – Petr Petrovich Poljakov (1902–1974)
 * Pollard – Charles Louis Pollard (1872–1945)
 * Pollexf. – John Hutton Pollexfen (1813–1899)
 * Pollich – Johan Adam Pollich (1740–1780)
 * Pollock – James Barkley Pollock (1863–1934)
 * Polunin – Nicholas Vladimir Polunin (1909–1997)
 * Pomel – Auguste Pomel (1821–1898)
 * Poole – Alick Lindsay Poole (1908–2008)
 * Popl. – Henrietta Ippolitovna Poplavskaja (1885–1956)
 * Popov – Mikhail Grigoríevič Popov (1893–1955)
 * Poppelw. – Dugald Louis Poppelwell (1863–1939)
 * Porcius – Florian Porcius (1816–1907)
 * Porteners – M.F. Porteners (fl. 1990)
 * Porter – Thomas Conrad Porter (1822–1901)
 * Porto – Paulo Campos Porto (1889–1968)
 * Poselg. – Heinrich Poselger (1818–1883)
 * Posp. – Eduard Pospichal (1838–1905)
 * Post – George Edward Post (1838–1909)
 * Potter – Michael Cressé Potter (1859–1948)
 * Potonié – Henry Potonié (1857–1913)
 * Pourr. – Pierre André Pourret (1754–1818)
 * Pouzolz – Pierre Marie Casimir de Pouzolz (1785–1858)
 * P.Parm. – Paul Évariste Parmentier (1860–1941)
 * P.Petit – Paul Charles Mirbel Petit (1834–1913)
 * Prada – María del Carmen Isabel Prada (born 1953)
 * Pradal – Émile Pradal (1795–1874)
 * Pradeep – Ayilliath K. Pradeep (fl. 1990)
 * Pradhan – Udai Chandra Pradhan (born 1949)
 * Praeger – Robert Lloyd Praeger (1865–1953)
 * Praet. – Ignaz Praetorius (1836–1908)
 * Prag. – Ernst Prager (1866–1913)
 * Prahl – Peter Prahl (1843–1911)
 * Prain – David Prain (1857–1944)
 * Prak.Rao – Chellapilla Surya Prakasa Rao (born 1917)
 * Pramanik – B. B. Pramanik (born 1933)
 * P.Ramesh – Polluri Ramesh (fl. 1997)
 * Prance – Ghillean Tolmie Prance (born 1937)
 * Prantl – Karl Anton Eugen Prantl (1849–1893)
 * Prassler – Maria Prassler (born 1938)
 * Prát – Silvestr Prát (1895–1990)
 * Prather – L. Alan Prather (born 1965)
 * Pratt – Anne Pratt (1806–1893)
 * Pray – Thomas Richard Pray (born 1923)
 * Preble – Edward Alexander Preble (1871–1957)
 * Preiss – Balthazar Preiss (1765–1850)
 * Preobr – Grigory A. Preobraschensky (1892–1919)
 * Prill. – Édouard Ernest Prillieux (1829–1915)
 * Primavesi – Anthony Leo Primavesi (1917–2011)
 * Pringle – Cyrus Pringle (1838–1911)
 * Pringsh. – Nathanael Pringsheim (1823–1894)
 * Prior — Richard Chandler Alexander Prior (1809–1902)
 * Priszter – Szaniszló Priszter (1917–2011)
 * Pritz. – George August Pritzel (1815–1874)
 * Priyankara – Theja Priyankara (fl. 2020)
 * P.R.O.Bally – Peter René Oscar Bally (1895–1980)
 * Prober – Suzanne Mary Prober (born 1964)
 * Proctor – George Richardson Proctor (1920–2015)
 * Prodan – Iuliu Prodan (1875–1959)
 * Profice – Sheila Regina Profice (born 1948)
 * Prokh. – Jaroslav Ivanovic Prokhanov (1902–1964)
 * Prosk. – Johannes Max Proskauer (1923–1970)
 * Prowazek – Stanislaus von Prowazek (1875–1915)
 * P.Royen – Pieter van Royen (1923–2002)
 * P.Rubtzoff – Peter Rubtzoff (1920–1995)
 * Pryer – Kathleen M. Pryer (fl. 1993)
 * Pryor – Alfred Reginald Pryor (1839–1881)
 * P.Sarasin – Paul Benedict Sarasin (1856–1929)
 * P.S.Ashton – Peter Shaw Ashton (born 1934)
 * P.Schneid. – Peter Schneider (1936–1989)
 * P.Selby – Prideaux John Selby (1788–1867)
 * P.S.Green – Peter Shaw Green (1920–2009)
 * P.Silva – António Rodrigo Pinto da Silva (1912–1992)
 * P.S.Liu – Pei Song Liu (fl. 1984)
 * P.S.N.Rao – P. Satyanarayana Rao (born 1949)
 * P.S.Short – Philip Sydney Short (born 1955)
 * P.S.Smith – Philip Sidney Smith (1877–1949)
 * P.S.Soltis – Pamela S. Soltis (fl. 2007)
 * P.Stark – Peter Stark (1888–1932)
 * P.S.Wyse Jacks. – Peter Wyse Jackson (born 1955)
 * P.Syd. – Paul Sydow (1851–1925) (father of Hans Sydow)
 * P.Taylor – Peter Geoffrey Taylor (1926–2011)
 * P.Temple – Paul Temple (fl. 2008)
 * P.T.Ong – Poh Teck Ong (fl. 2009)
 * P.T.Li – Ping Tao Li (born 1936)
 * Puente-Lel. – Caroline Puente-Lelièvre (fl. 2012)
 * Puget – François Puget (1829–1880)
 * Pugsley – Herbert William Pugsley (1868–1947)
 * Pujals – Carmen Pujals (1916–2003)
 * Pulle – August Adriaan Pulle (1878–1955)
 * Pulliat – Victor Pulliat (1827–1866)
 * Pult. – Richard Pulteney (1730–1801)
 * Purchas – William Henry Purchas (1823–1903)
 * Purdie – William Purdie (c.1817–1857)
 * Purdom – William Purdom (1880–1921)
 * Purdy – Carlton Elmer Purdy (1861–1945)
 * Purk. – Emanuel von Purkyně (1832–1882)
 * Purpus – Carl Albert Purpus (1851–1941)
 * Pursell – Ronald Arling Pursell (1930–2014)
 * Pursh – Frederick Traugott Pursh (1774–1820)
 * Purton – Thomas Purton (1768–1833)
 * Puspit. – Dwi Murti Puspitaningtyas (fl. 2005)
 * Putnam – George Palmer Putnam (1887–1950)
 * Putt. – Alois (Aloys) Putterlick (1810–1845)
 * Puttock – Christopher Francis Puttock (born 1954)
 * Putz. – Jules Putzeys (1809–1882)
 * P.V.Heath – Paul V. Heath (born 1950)
 * P.V.Ramana – Pragada Venkata Ramana (fl. 2018)
 * P.Watson – Peter William Watson (1761–1830)
 * P.W.Ball – Peter William Ball (born 1932)
 * P.Wilkie – Peter Wilkie (fl. 1999)
 * P.Wilson – Percy Wilson (1879–1944)
 * P.Woods – Patrick James Blythe Woods (1932–2004)
 * P.Y.Chen – Pang Yu Chen (born 1936)
 * Pynaert – Édouard-Christophe Pynaert (1835–1900)

Q–Z
To find entries for Q–Z, use the table of contents above.