List of botanists by author abbreviation (I–J)

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

I

 * I.A.Abbott – Isabella Aiona Abbott (1919–2010)
 * I.A.Pilát – Ignatz Anton Pilát (1820–1870)
 * I.Baker – Irene Baker (1918–1989)
 * I.Barua – Iswar Chandra Barua (born 1960)
 * I.Bjørnstadt (also Nordal) – Inger Nordal (born 1944)
 * Ickert-Bond – Stefanie M. Ickert-Bond (fl. 2001–2013)
 * I.C.Martind. – Isaac Comly Martindale (1842–1893)
 * I.C.Nielsen – Ivan Christian Nielsen (1946–2007)
 * Ida – Reijiro Ida (fl. 1969)
 * I.Deg. – Isa Degener (1924–2018)
 * I.D.Illar. – Irina D. Illarionova (fl. 2008)
 * Ietsw. – Jaan H. Ietswaart (born 1940)
 * I.F.Lewis – Ivey Foreman Lewis (1882–1964)
 * I.G.Stone – Ilma Grace Stone (1913–2001)
 * I.Gut. – Rosa Ivonne Gutiérrez-Sánchez (fl. 2018)
 * I.Hagen – Ingebrigt Severin Hagen (1852–1917)
 * I.H.Boas – Isaac Herbert Boas (1878-1955)
 * I.I.Abramov – (1912–1990)
 * Iinuma – Yokusai Iinuma (1782–1865)
 * I.Keller – Ida Augusta Keller (1866–1932)
 * Ikonn. – (1931–2005)
 * Ik.Takah. – Ikuro Takahashi (1892–1981)
 * Iliff – James Iliff (1923–2014)
 * Iljin – (1889–1967)
 * Iljinsk. – Irina Alekseevna Iljinskaja (1921–2011)
 * I.Löw – Immanuel Löw (1854–1944)
 * Iltis – Hugh Hellmut Iltis (1925–2016)
 * Imbach – Emil J. Imbach (1897–1970)
 * I.M.Haring – Inez M. Haring (1875–1968)
 * I.M.Johnst. – Ivan Murray Johnston (1898–1960)
 * Immelman – Kathleen Leonore Immelman (born 1955)
 * I.M.Oliv. – Inge Magdalene Oliver (1947–2003)
 * I.M.Turner – Ian Mark Turner (born 1963)
 * Incarv. – Pierre Nicolas le Chéron (d')Incarville (1706–1757)
 * Ingold – Cecil Terence Ingold (1905–2010)
 * Ingram – Collingwood Ingram (1880–1981)
 * Ingw. – Walter Edward Theodore Ingwersen (1885–1960)
 * Inocencio – Cristina Inocencio (born 1969)
 * Inoue – Inoue Hiroshi (1932–1989)
 * I.O.Cook – Ian O. Cook (fl. 1991)
 * I.Oliv. – Ian Oliver (born 1954)
 * I.Piña – Ignacio Piña Luján (fl. 1980)
 * I.Pop – Ioan Pop (1922–2018)
 * I.Rácz – István Rácz (born 1952)
 * Irmsch. – (1887–1968)
 * Irwin – James Bruce Irwin (1921–2012)
 * Isaac – Frances Margaret Leighton (later Isaac) (1909–2006) (F.M.Leight. is also used)
 * I.Sastre – Ines Sastre (born 1955)
 * Isawumi – Moses A. Isawumi (fl. 1995)
 * I.S.Chen – Ih Sheng Chen (fl. 1972)
 * Isely – Duane Isely (1918–2000)
 * I.Sinclair – Isabella Sinclair (1842–1900)
 * Ising – (1884–1973)
 * I.S.Nelson – Ira Schreiber Nelson (1911–1965)
 * I.Sprague – Isaac Sprague (1811–1895)
 * I.Telford – Ian R.H. Telford (born 1941)
 * I.Thomps. – Ian R. Thompson (fl. 1996)
 * Ito – Keisuke Ito (1803–1901)
 * I.Verd. – Inez Clare Verdoorn (1896–1989)
 * Iversen – Johannes Iversen (1904–1972)
 * Ives – Joseph Christmas Ives (1828–1868)
 * I.W.Bailey – Irving Widmer Bailey (1884–1967)
 * I.W.Hutchison – Isobel Wylie Hutchison (1889–1982)
 * I.Williams – (1912–2001)

J

 * J.A.Armstr. – James Andrew Armstrong (born 1950)
 * Jaaska – Vello Jaaska (born 1936)
 * Jabbour – Florian Jabbour (fl. 2011)
 * Jack – William Jack (1795–1822)
 * Jackes – Betsy Rivers Jackes (born 1935)
 * Jacks. – George Jackson (1780–1811)
 * J.A.Clark – Josephine Adelaide Clark (1856–1929)
 * Jac.M.Burke – Jacinta Marie Burke (fl. 2006)
 * Jacobi  – Georg Albano von Jacobi (1805–1874)
 * Jacobs – Maxwell Ralph Jacobs (1905–1979)
 * Jacobsen – Hans Jacobsen (1815–1891)
 * Jacobsson – Stig Jacobsson (born 1938)
 * Jacq. – Nikolaus Joseph von Jacquin (1727–1817)
 * Jacq.-Fél. – Henri Jacques-Félix (born 1907)
 * Jacquem. – Venceslas Victor Jacquemont (1801–1832)
 * Jacques – Henri Antoine Jacques (1782–1866)
 * Jacquinot – Honoré Jacquinot (1814–1887)
 * Jacz. – Arthur Arthurovič Jaczewski (1863–1932)
 * Jaderh. – Axel Elof Jaderholm (1868–1927)
 * Jafri – Saiyad Masudal Hasan Jafri (1927–1986)
 * J.Agardh – Jacob Georg Agardh (1813–1901)
 * J.A.Guim. – José d'Ascensão Guimarães (1862–1922)
 * Jahand. – Émile Jahandiez (1876–1938)
 * Jakubz. – Moisej Markovič Jakubziner (1898–1979)
 * Jalal – Jeewan Singh Jalal (born 1979)
 * Jalas – Arvo Jaakko Juhani Jalas (1920–1999)
 * Jalink – Leonardo Martinus Jalink (born 1956)
 * J.Allam. – Jean-Nicolas-Sébastien Allamand (1713 or 1716–1787 or 1793)
 * J.A.Martind. – Joseph Anthony Martindale (1837–1914)
 * J.A.McDonald – John Andrew McDonald (fl. 1982)
 * James – Thomas Potts James (1803–1882)
 * Jameson – William Jameson (1796–1873)
 * J.A.Muir – John A. Muir (fl. 1973)
 * Janch. – Erwin Emil Alfred Janchen (1882–1970)
 * Jančovič. – Soňa Jančovičová (fl. 2011)
 * Jancz. – Edward Janczewski (1846–1918)
 * J.Anderson – James Anderson (fl. 1868)
 * J.Andrews – J. Andrews (fl. 1952)
 * Janes – Jasmine K. Janes (fl. 2010)
 * Janisch. – (1875–1944)
 * Janka – Victor von Janka (1837–1900)
 * Janošík – Lukáš Janošík (fl. 2022)
 * Janse – Johannes Albertus Janse (1911–1977)
 * J.Anthony – John Anthony (1891–1972)
 * J.A.Palmer – Julius Auboineau Palmer (1840–1899)
 * Jarman – S. Jean Jarman
 * J.A.Schmidt – Johann Anton Schmidt (1823–1905)
 * Játiva – Carlos D. Játiva (fl. 1963)
 * Jaub. – Hippolyte François Jaubert (1798–1874)
 * Jáv. – Sándor (Alexander) Jávorka (1883–1961)
 * J.Bauhin – Johann Bauhin (1541–1613)
 * J.B.Beck – James B. Beck (fl. 2010)
 * J.B.Comber – James Boughtwood Comber (1929–2005)
 * J.B.Fisch. – Johann Baptist Fischer (1803–1832)
 * J.B.Kirkp. – James Barrie Kirkpatrick (born 1946)
 * J.B.Mackay – John Bain Mackay (1795–1888)
 * J.B.Nelson – John B. Nelson (born 1951)
 * J.B.Petersen – Johannes Boye Petersen (1887–1961)
 * J.B.Phipps – (born 1934)
 * J.Bradbury – John Bradbury (1768–1823)
 * J.Breitenb. – Josef Breitenbach (1927–1998)
 * J.B.Rohr – (1686–1742)
 * J.B.Sinclair – James Burton Sinclair (born 1927)
 * J.Buchholz – John Theodore Buchholz (1888–1951)
 * J.B.Williams – John Beaumont Williams (1932–2005)
 * J.Carey – John Carey (1797–1880)
 * J.C.Clausen – Jens Christen (Christian) Clausen (1891–1969)
 * J.C.F.Hopkins – John Collier Frederick Hopkins (1898–1981)
 * J.C.Fisch. – Johann Carl Fischer (1804–1885)
 * J.C.Gomes – José Corrêa Gomes, Jr. (1919–1965)
 * J.C.Hickman – James Craig Hickman (1941–1993)
 * J.Clayton – John Clayton (1694–1773)
 * J.C.Manning – John Charles Manning (born 1962)
 * J.C.Martínez – J. Carlos Martínez Macchiavello (born 1931)
 * J.C.Mikan – Johann Christian Mikan (1769–1844)
 * J.C.Nelson – James Carlton Nelson (1867–1944)
 * J.Commelijn – Jan Commelin (also known by Jan Commelijn or Johannes Commelinus) (1629–1692)
 * J.Compton – James A. Compton (born 1953)
 * J.C.Parks – James C. Parks (1942–2002)
 * J.C.Prag. – Jan C. Prager (born 1934)
 * J.C.Ross – James Clark Ross (1800–1862)
 * J.C.Siqueira – Josafá Carlos de Siqueira (born 1953)
 * J.C.Sowerby – James de Carle Sowerby (1787–1871)
 * J.C.Vogel – Johannes Vogel (born 1963)
 * J.C.Wendl. – Johann Christoph Wendland (1755–1828)
 * J.D.Arm. – James D. Armitage (born 1976)
 * J.D.Bacon – John Dudley Bacon (born 1943)
 * J.D.Briggs – John D. Briggs (fl. 1994)
 * J.D.Mitch. – John D. Mitchell (fl. 1993)
 * J.Dransf. – John Dransfield (born 1945)
 * J.D.Ray – James Davis Ray Jr. (1918–1990)
 * J.Drumm. – James Drummond (1784–1863)
 * J.D.Sauer – Jonathan Deininger Sauer (1918–2008)
 * J.D.Schultze – Johannes Dominik Schultze (1752–1790)
 * J.Duan – Jun Duan (fl. 2010)
 * J.E.Alexander – James Edward Alexander (1803–1885)
 * Jeanes – Jeffrey A. Jeanes (fl. 2000)
 * Jean White – Jean White-Haney (1877–1953)
 * Jebb – Matthew H. P. Jebb (born 1958)
 * J.E.Br. – John Ednie Brown (1848–1899)
 * Jefferies – R.L. Jefferies (fl. 1987)
 * Jeffrey – John Frederick Jeffrey (1866–1943)
 * J.E.Gray – John Edward Gray (1800–1875)
 * Jekyll – Gertrude Jekyll (1843–1932)
 * J.E.Lange – Jakob Emanuel Lange (1864–1941) (father of Knud Morten Lange)
 * J.Ellis – John Ellis (1710–1776)
 * J.E.Palmér – Johan Ernst Palmér (1863–1946)
 * J.E.Pohl – Johann Ehrenfried Pohl (1746–1800)
 * Jeps. – Willis Linn Jepson (1867–1946)
 * Jérémie – Joël Jérémie (born 1944)
 * J.E.Sowerby – John Edward Sowerby (1825–1870)
 * Jess. – Karl Friedrich Wilhelm Jessen (1821–1889)
 * Jessop – John Peter Jessop (born 1939)
 * Jessup – Laurence W. Jessup (born 1947)
 * Jeswiet – Jacob Jeswiet (1879–1966)
 * Jeuken – M. Jeuken (fl. 1952)
 * J.Everett – Joy Everett (born 1953)
 * J.E.Vidal – (1914–2020)
 * J.E.Wright – Jorge Eduardo Wright (1922–2005)
 * J.E.Zetterst. – Johan Emanuel Zetterstedt (1828–1880)
 * J.Fabr. – Johan Christian Fabricius (1745–1808)
 * J.F.Bailey – John Frederick Bailey (1866–1938)
 * J.F.Clark – Judson Freeman Clark (1870–1942)
 * J.F.Cowell – John Francis Cowell (1852–1915)
 * J.F.Gmel. – Johann Friedrich Gmelin (1748–1804)
 * J.Fisch. – Jacob Benjamin Fischer (1730–1793)
 * J.-F.Leroy – (1915–1999)
 * J.Florence – Jacques Florence (born 1951)
 * J.F.Macbr. – James Francis Macbride (1892–1976)
 * J.F.Matthews – James F. Matthews (born 1935)
 * J.F.Maxwell – James F. Maxwell (1949–2015)
 * J.Forbes – James Forbes (1773–1861)
 * J.Frost – John Frost (1803–1840)
 * J.Fryer – Jeanette Fryer (fl. 1993)
 * J.Gay – Jacques Etienne Gay (1786–1864)
 * J.G.Cooper – James Graham Cooper (1830–1902)
 * J.Gerard – John Gerard (1545–1612)
 * J.Gerlach – Justin Gerlach (zoologist) (born 1970)
 * J.G.Gmel. – Johann Georg Gmelin (1709–1755)
 * J.G.Jack – John George Jack (1861–1949)
 * J.G.Kühn – Julius Gotthelf Kühn (1825–1910)
 * J.G.Nelson – John Gudgeon Nelson (1818–1882)
 * J.Gröntved – Julius Gröntved (or Grøntved) (1899–1967)
 * J.G.Sm. – Jared Gage Smith (1866–1957)
 * J.Guan Wang – Jia-Guan Wang (fl. 2022)
 * J.G.West – Judith Gay West (born 1949)
 * J.H.Adam – Jumaat Haji Adam (born 1956)
 * J.H.Chau – John H. Chau (fl. 2017)
 * J.H.Christ – John Henry ("Heinie") Christ (1896–1972)
 * J.Harriman – John Harriman (1760–1831)
 * J.H.Kirkbr. – Joseph Harold Kirkbride (born 1943)
 * J.Hogg – John Hogg (1800–1869)
 * J.Houz. – Jean Houzeau de Lehaie (1867–1959)
 * J.H.Ross – James Henderson Ross (born 1941)
 * J.H.Schaffn. – John Henry Schaffner (1866–1939)
 * J.H.So – Ji Hyeon So (fl. 2017)
 * J.H.Thomas – John Hunter Thomas (1928–1999)
 * J.H.Wallace – John Hume Wallace (born 1918)
 * J.H.Willis – James Hamlyn Willis (1910–1995)
 * Jian W.Li – Jian Wu Li (fl. 2014)
 * Jílek – Bohumil Jílek (1905–1972)
 * J.Jacobsen – Jens Peter Jacobsen (1847–1885)
 * J.J.Amann – Jean Jules Amann (1859–1939)
 * J.J.Bruhl – Jeremy James Bruhl (born 1956)
 * J.J.Engel – John Jay Engel (born 1941)
 * J.Jiménez Alm. – José de Jesús Jiménez Almonte (1905–1982)
 * J.J.Kickx – Jean Jacques Kickx (1842–1887)
 * J.J.Scheuchzer – Johann Jacob Scheuchzer (1672–1733)
 * J.J.Sm. – Johannes Jacobus Smith (1867–1947)
 * J.Jundz. – Józef Jundzill (1794–1877)
 * J.Juss. – Joseph de Jussieu (1704–1779)
 * J.J.Verm. – Jaap J. Vermeulen (born 1955)
 * J.J.Wood – Jeffrey James Wood (1952–2019)
 * J.K.Bartlett – John Kenneth Bartlett (1945–1986)
 * J.Kern – Johannes Hendrikus Kern (1903–1974)
 * J.Kern. – Johann Simon von Kerner (1755–1830)
 * J.Kickx – Jean Kickx, Sr. (1775–1831)
 * J.Kickx f. – Jean Kickx, Jr. (1803–1864)
 * J.K.Morton – John Kenneth Morton (1928–2011)
 * J.Koenig – Johann Gerhard Koenig (1728–1785)
 * J.Kost. – Joséphine Thérèse Koster (1902–1986)
 * J.K.Towns. – John Kirk Townsend (1809–1851)
 * J.Lachm. – (1832–1860)
 * J.L.Clark – John Littner Clark (born 1969)
 * J.Lee – James Lee (1715–1795)
 * J.Léonard – Jean Joseph Gustave Léonard (1920–2013)
 * J.L.Gentry – Johnnie Lee Gentry (born 1939)
 * J.Lowe – Josiah Lincoln Lowe (1905–1997)
 * J.L.Palmer – Johann Ludwig Palmer (1784–1836)
 * J.L.Parm. – Jean Louis Jacques Henri Parmentier (1777–1865)
 * J.L.Porter – John L. Porter (born 1964)
 * J.L.Schultz – Joanna L. Schultz (born 1963)
 * J.Lundb. – Johannes Lundberg (fl. 2001)
 * J.MacGill. – John MacGillivray (1822–1867)
 * J.Mackay – James Townsend Mackay (1775–1862)
 * J.Macrae – James Macrae (died 1830)
 * J.Martyn – John Martyn (1699–1768)
 * J.Mathew – Jose Mathew (born 1985)
 * J.M.Bigelow – John Milton Bigelow (1804–1878)
 * J.M.Black – John McConnell Black (1855–1951)
 * J.M.Clarke – John Mason Clarke (1857–1925)
 * J.M.Coult. – John Merle Coulter (1851–1928)
 * J.M.C.Rich. – Jean Michel Claude Richard (1787–1868)
 * J.M.Gillett – John Montague Gillett (1918–2014)
 * J.M.Hart – J.M. Hart (fl. 1998)
 * J.M.H.Shaw – Julian Mark Hugh Shaw (born 1955)
 * J.Milne – Josephine Milne (born 1957)
 * J.M.Kain – Joanna M. Kain (1930–2017)
 * J.M.MacDougal – John Mochrie MacDougal (born 1954)
 * J.M.Macoun – James Melville Macoun (1862–1920)
 * J.M.Muñoz – Jesús M. Muñoz (born 1955)
 * J.Moll – Jan Willem Moll (1851–1933)
 * J.M.Porter – James Mark Porter (born 1956)
 * J.M.Powell – Jocelyn Marie Powell (born 1939)
 * J.M.Schopf – James Morton Schopf (1911–1978)
 * J.M.Taylor – Joan M. Taylor (born 1929)
 * J.M.Tucker – John Maurice Tucker (1916–2008)
 * J.Muir – John Muir (1838–1914)
 * J.Muñoz – Jesús Muñoz (born 1964)
 * J.Murata – Jin Murata (born 1952)
 * J.Murray – John Murray (1841–1914)
 * J.M.Waller – James Martin Waller (born 1938)
 * J.M.Ward – Josephine M. Ward (fl. 1997)
 * J.M.Watson – John Michael Watson (born 1936)
 * J.M.Webber – John Milton Webber (1897–1984)
 * J.M.Wood – John Medley Wood (1827–1915)
 * Jn.Dalton – John Dalton (1766–1844)
 * J.Nelson – John Nelson (1826–1867)
 * J.N.Haage – Johann Nicolaus Haage (Gärtner, 1766) (1826–1878)
 * Jobson – Peter Craig Jobson (born 1965)
 * Johan-Olsen (also Sopp) – Olav Johan Sopp (1860–1931)
 * Johans. – Frits Johansen (1882–1957)
 * Johanss. – (1856–1928)
 * John Muir – John Muir (1874–1947)
 * John Parkinson – John Parkinson (1567–1650)
 * Johnst. – George Johnston (1797–1855)
 * Johow – Federico Johow (also as Friedrich Richard Adelbert (or Adelbart) Johow) (1859–1933)
 * Jones – William Jones (1746–1794)
 * Jongkind – Carel Christiaan Hugo Jongkind (born 1954)
 * Jonst. – John Jonston (also as Johannes Jonston or Joannes Jonstonus) (1603–1675)
 * Jord. – Claude Thomas Alexis Jordan (1814–1897)
 * Jordanov – Daki Jordanov (1893–1978)
 * Josekutty – Elayanithottathil Joseph Josekutty (fl. 2016)
 * Joshi – Amar Chaud Joshi (1908–1971)
 * Jos.Kern. – Josef Kerner (1829–1906)
 * Jos.Martin – Joseph Martin (fl. 1788–1826)
 * J.Ott – Jonathan Ott (born 1949)
 * Jovet – Paul Albert Jovet (1896–1991)
 * Jovet-Ast – Suzanne Jovet-Ast (1914–2006)
 * Joy Thomps. – Joy Thompson (1923–2018)
 * J.Palmer – Joanne Palmer (born 1960)
 * J.P.Anderson – Jacob Peter Anderson (1874–1953)
 * J.Parn. – John Adrian Naicker Parnell (born 1954)
 * J.Pfeiff. – Johan Philip Pfeiffer (1888–1947)
 * J.-P.Frahm – Jan-Peter Frahm (1945–2014)
 * J.P.Nelson – Jane P. Nelson (fl. 1980)
 * J.Poiss. – (1833–1919)
 * J.P.Pigott – Julian Patrick Pigott (fl. 2001)
 * J.Prado – Jefferson Prado (born 1964)
 * J.Presl – Jan Svatopluk Presl (1791–1849)
 * J.P.Yue – Ji-pei Yue (fl. 2004)
 * J.Raynal – (1933–1979)
 * J.R.Clarkson – John Richard Clarkson (born 1950)
 * J.Rémy – Ezechiel Jules Rémy (1826–1893)
 * J.R.Edm. – John Richard Edmondson (born 1948)
 * J.R.Forst. – Johann Reinhold Forster (1729–1798)
 * J.R.I.Wood – John Richard Ironside Wood (born 1944)
 * J.R.Lee – John Ramsay Lee (1868–1959)
 * J.R.Rohrer – Joseph Raphael Rohrer (born 1954)
 * J.Roth – Johannes Rudolph Roth (1815–1858)
 * J.Rousseau – (1905–1970)
 * J.Roux – Jean Roux (1876–1939)
 * J.R.Perkins – John Russell Perkins (born 1868)
 * J.R.Rolfe – Jeremy Richard Rolfe (fl. 2013)
 * J.R.Wheeler – Judith Roderick Wheeler (born 1944)
 * J.Scheff. – Jozef Scheffer (1903–1949)
 * J.Scheuchzer – Johannes Gaspar Scheuchzer (1684–1738)
 * J.Schiller – Josef Schiller (1877–1960)
 * J.Schneid. – Josef Schneider (died 1885)
 * J.Schröt. – Joseph Schröter (1837–1894)
 * J.Schultze-Motel – Jürgen Schultze-Motel (born 1930)
 * J.Schust. – (1886–1949)
 * J.S.Ma – Jin Shuang Ma (born 1955)
 * J.Scott – John Scott (1838–1880)
 * J.Scriba – Julius Karl Scriba (1848–1905)
 * J.Steiner – Julius Steiner (1844–1918)
 * J.Sinclair – James Sinclair (1913–1968)
 * J.Sm. – John Smith (1798–1888)
 * J.S.Martin – James Stillman Martin (1914–2000)
 * J.S.Mill. – (born 1953)
 * J.S.Muell. – John Miller (1715–c.1792) aka Johann Sebastian Mueller
 * J.Soulié – Jean André Soulié (1858–1905)
 * J.S.Pringle – James Scott Pringle (born 1937)
 * J.Stewart – (1936–2011)
 * J.St.-Hil. – Jean Henri Jaume Saint-Hilaire (1772–1845)
 * J.Stirl. – James Stirling (1852–1909)
 * J.Swamy – Jetti Swamy (fl. 2016)
 * J.T.Baldwin – John Thomas Baldwin (1910–1974)
 * J.T.Curtis – John Thomas Curtis (1913–1961)
 * J.T.Johanss. –  (fl. 1988)
 * J.T.Howell – John Thomas Howell (1903–1994)
 * J.T.Hunter – John T. Hunter (fl. 1967)
 * J.T.Palmer – James Terence Palmer (born 1923)
 * J.T.Pan – Jin Tang Pan (born 1935)
 * J.T.Pereira – Joan T. Pereira (fl. 1994)
 * J.T.Quekett – John Thomas Quekett (1815–1861) (brother of Edwin John Quekett)
 * J.T.Wall – J. T. Wall (fl. 1934)
 * J.T.Waterh. – John Teast Waterhouse (1924–1983)
 * J.T.Williams – John Trevor Williams (1938-2015)
 * Judd – Walter Stephen Judd (born 1951)
 * Jum. – Henri Lucien Jumelle (1866–1935)
 * Jungh. – (Friedrich) Franz Wilhelm Junghuhn (1809–1864)
 * Junius – Hadrianus Junius (1511–1575)
 * Juss. – Antoine Laurent de Jussieu (1748–1836)
 * Juswara – Lina Susanti Juswara (born 1971)
 * Juz. – (1893–1959)
 * J.V.Lamour. – Jean Vincent Félix Lamouroux (1779–1825)
 * J.V.Schneid. – Julio Valentin Schneider (born 1967)
 * J.V.Stone – Judi V. Stone (born 1946)
 * J.V.Thomps. – John Vaughan Thompson (1779–1847)
 * J.Wallis – John Wallis (1714–1793)
 * J.W.Baker – Jason W. Baker (born 1981)
 * J.W.Benn. – John Whitchurch Bennett (fl. 1842)
 * J.W.Cribb – Joan Winifred Cribb (born 1930)
 * J.W.Dawson – John Wyndham Dawson (1928–2019)
 * J.Wen – Jun Wen (born 1963)
 * J.West – James West (1875–1939)
 * J.W.Green – John William Green (born 1930)
 * J.W.Grimes – James Walter Grimes (born 1953)
 * J.W.Horn – James W. Horn (fl. 2009)
 * J.White R.N. – John White (1757–1832)
 * J.W.Ingram – John William Ingram (born 1924)
 * J.W.Mast. – John William Masters (1792–1873)
 * J.W.Moore – John William Moore (botanist) (1901–1990) (not to be confused with the American politician of the same name)
 * J.Woods – Joseph Woods Jr. (1776–1864)
 * J.W.Powell – John Wesley Powell (1834–1902)
 * J.W.Robbins – James Watson Robbins (1801–1879)
 * J.W.Sturm – Johann Wilhelm Sturm (1808–1865)
 * J.W.Thomson – John Walter Thomson (1913–2009)
 * J.W.Weinm. – Johann Wilhelm Weinmann (1683–1741)
 * J.W.White – James Walter White (1846–1932)
 * J.W.Zetterst. – Johan Wilhelm Zetterstedt (1785–1874)
 * J.W.Zhai – Jun Wen Zhai (born 1985)
 * J.Zahlbr. – (1782–1851)
 * J.Z.Weber – Joseph Zvonko Weber (1930–1996)

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