A

• Aa – Hubertus Antonius van der Aa (1935–2017)
• A.A.Cocucci – Andrea A. Cocucci [es] (born 1959)
• A.A.Eaton – Alvah Augustus Eaton (1865–1908)
• A.A.Fisch.Waldh. – Alexandr Alexandrovich Fischer von Waldheim (1839–1920)
• A.Agostini – Angela Agostini (born 1880)
• A.A.Ham. – Arthur Andrew Hamilton (1855–1929)
• A.A.Hend. – Andrew Augustus Henderson (1816–1876)
• A.Ames – Adeline Ames (1879–1976)
• A.Anderson – Alexander Anderson (1748–1811)
• A.Arber – Agnes Arber (1879–1960)
• Aarons. – Aaron Aaronsohn (1876–1919)
• Aase – Hannah Caroline Aase (1883–1980)
• A.Barbero – Andrés Barbero (1877–1951)
• A.Bassi – Agostino Bassi (1773–1856)^[5]
• A.Baytop - Asuman Baytop (1920-2015)
• Abbayes – Henry Nicollon des Abbayes (1898–1974)
• Abbiatti – Delia Abbiatti (born 1918)
• Abbot – John Abbot (1751–c. 1840)
• Abedin – Sultanul Abedin [Wikidata] (fl. 1986)
• Aberc. – Henry McLaren, 2nd Baron Aberconway (1879–1953)
• A.Berger – Alwin Berger (1871–1931)
• A.B.Frank – Albert Bernhard Frank (1839–1900)
• A.B.Graf – Alfred Byrd Graf (1901–2001)
• A.B.Jacks. – Albert Bruce Jackson (1876–1947)
• A.Bloxam – Andrew Bloxam (1801–1878)
• A.Blytt – Axel Gudbrand Blytt (1843–1898)
• A.Br. – Addison Brown (1830–1913)
• Abramov – Ivan N. Abramov (1884–1953)
• Abrams – LeRoy Abrams (1874–1956)
• A.Braun – Alexander Karl Heinrich Braun (1805–1877)
• Abrom. – Johannes Abromeit (1857–1946)
• A.Bruggen – Adolph Cornelis van Bruggen (born 1929)
• A.Butler – Alan Butler [Wikidata] (born 1946)
• A.Cabrera – Ángel Cabrera (1879–1960) (not to be confused with botanist Ángel Lulio Cabrera (1908–1999))
• A.Camus – Aimée Antoinette Camus (1879–1965)
• A.Cast. – Alberto Castellanos [es; pt] (1896–1968)
• Acerbi – Giuseppe Acerbi (1773–1846)
• Ach. – Erik Acharius (1757–1819)
• A.C.H.Blinks – Anne Catherine Hof Blinks (1903–1995)
• A.Chev. – Auguste Jean Baptiste Chevalier (1873–1956)
• Achv. – Agazi Asaturovich Achverdov (born 1907)
• Acloque – Alexandre Noël Charles Acloque (1871–1908)
• A.C.Schultz – August Christian Schultz (1813–1908)
• A.C.Sm. – Albert Charles Smith (1906–1999)
• Acuña – Julián Acuña Galé (1900–1973)
• A.Cunn. – Allan Cunningham (1791–1839)
• A.C.White – Alain Campbell White (1880–1951)
• Adams – Johann Friedrich Adam (1780–1838)
• Adamson – Robert Stephen Adamson (1885–1965)
• Adans. – Michel Adanson (1727–1806)
• A.DC. – Alphonse Louis Pierre Pyrame de Candolle (1806–1893)
• A.D.Danilov – Alexander Danilovich Danilov (born 1903)
• Ade – Alfred Ade [Wikidata] (1876–1968)
• Adelb. – Albert George Ludwig Adelbert [Wikidata] (1914–1972)
• Adema – Fredericus Arnoldus Constantin Basil Adema (born 1939)
• Aderh. – Rudolf Ferdinand Theodor Aderhold (1865–1907)
• A.D.Hardy – Alfred Douglas Hardy (1870–1958)
• A.D.Hawkes – Alex Drum Hawkes (1927–1977)
• A.Dietr. – Albert Gottfried Dietrich (1795–1856)
• Adolf – Nina Avgustinovna Adolf (1903–1951)
• A.E.D.Daniels – Albert Ebenezer Dulip Daniels (born 1964)
• A.E.Hoffm. – Adriana Hoffmann (born 1940)
• Aellen – Paul Aellen [de; es; pt] (1896–1973)
• A.E.Newton – Angela E. Newton (born 1958]
• A.E.Ortmann – Arnold Edward Ortmann (1863–1927)
• A.E.Reuss – August Emanuel Rudolph von Reuss (1811–1873)
• A.Ernst – Alfred Ernst (1875–1968)
• A.Evans – Alexander William Evans (1868–1959)
• A.E.van Wyk – Abraham Erasmus Braam van Wyk (born 1952)
• A.-E.Wolf – Anne-Elizabeth Wolf (fl. 1998)
• A.F.Bartsch – Alfred Frank Bartsch (1913–2009)^[6]
• A.Fedtsch. – Alexei Pavlovich Fedchenko (1844–1873)
• A.Fisch. – Alfred Fischer (1858–1913)
• Afonina – Olga Mikhailovna Afonina (born 1945)
• A.F.Tryon – Alice Faber Tryon (1920–2009)
• Afzel. – Adam Afzelius (1750–1837)
• Agerer – Reinhard Agerer [Wikidata] (born 1947)
• A.G.Floyd – Alexander G. Floyd (born 1926)
• A.G.Ham. – Alexander Greenlaw Hamilton (1852–1941)
• A.Gibson – Alexander Gibson (1800–1867)
• A.G.Jones – Template:Almut Gitter Jones (1923–2013)
• A.G.Lyon – Alexander Geoffrey Lyon (fl. 1950–1960)
• A.G.Mill. – Anthony G. Miller [Wikidata] (born 1951)
• Agra – Maria de Fátima Agra (born 1952)
• A.Gray – Asa Gray (1810–1888)
• A.Ham. – Arthur Hamilton [Wikidata] (fl. 1832)
• A.Hässl. – Arne Hässler (1904–1952)
• A.Hay – Alistair Hay (born 1955)
• A.Heller – Amos Arthur Heller (1867–1944)
• A.Hend. – Archibald Henderson (born 1921)
• A.Henry – Augustine Henry (1857–1930)
• A.H.Evans – Arthur Humble Evans (1855–1943)
• A.H.Gentry – Alwyn Howard Gentry (1945–1993)
• A.H.Heller – Alfonse Henry Heller [es] (1894–1973)
• A.H.Holmgren – Arthur Hermann Holmgren [es] (1912–1992)
• A.H.Kent – Adolphus Henry Kent (1828–1913)
• Ahmadjian – Vernon Ahmadjian (1930–2012)
• Ahrendt – Leslie Walter Allen Ahrendt (1903–1969)
• A.H.S.Lucas – Arthur Henry Shakespeare Lucas (1853–1936)
• A.Huet – Alfred Huet du Pavillon (1829–1907)
• Ainsle – Whitelaw Ainsle (1767–1837)
• Ainsw. – Geoffrey Clough Ainsworth (1905–1998)
• Airy Shaw – Herbert Kenneth Airy Shaw (1902–1985)
• Aitch. – James Edward Tierney Aitchison (1836–1898)
• Aiton – William Aiton (1731–1793)
• A.Jaeger – August Jaeger (1842–1877)
• A.J.Eames – Arthur Johnson Eames (1881–1969)
• A.J.Hend. – Andrew Henderson (born 1950)
• A.J.Hill – Albert Joseph Hill (born 1940)
• A.J.M.Baker – Alan John Martin Baker (born 1948)
• A.J.Paton – Alan James Paton (born 1963)
• A.J.Scott – Andrew John Scott (botanist) [Wikidata] (born 1950)
• A.Juss. – Adrien-Henri de Jussieu (1797–1853)
• A.Kern. – Anton Kerner von Marilaun (1831–1898)
• Akeroyd – John Akeroyd (born 1952)
• Akhani – Hossein Akhani [es] (born 1950)
• A.K.Irvine – Anthony Kyle Irvine (born 1937)
• A.K.Skvortsov – Alexey Skvortsov (1920–2008)
• A.K.S.Prasad – Akshinthala K. Sai Krishna Prasad (born 1949)
• A.Kurz – Albert Kurz (1886–1948)^[7]
• A.K.Wallace – Anne Karin Wallace (fl. 1997)
• Alain – Henri Alain Liogier (1916–2009)
• A.L.Andrews – Albert LeRoy Andrews (1878–1961)
• Alb. – Johannes Baptista von Albertini (1769–1831)
• Albov – Nikolai Michailovich Albov (1866–1897)
• Albr. – David Edward Albrecht (born 1962)
• Al.Brongn. – Alexandre Brongniart (1770–1847)
• Alderw. – Cornelis Rugier Willem Karel van Alderwerelt van Rosenburgh (1863–1936)
• Aldrovandi – Ulisse Aldrovandi (1522–1605)
• Alef. – Friedrich Georg Christoph Alefeld (1820–1872)
• A.Lem. – Adrien Lemaire (1852–1902)
• A.Lesson – Adolphe Pierre Primevère Lesson (1805–1888)
• Alexander – Edward Johnston Alexander (1901–1985)
• Alexeeva – N. B. Alexeeva (fl. 2006)
• A.L.Grant – Adele Lewis Grant (1881–1969)
• Al.Jahn – Alfredo Jahn Hartman (1867–1940)
• All. – Carlo Allioni (1728–1804)
• A.L.Lamb – Anthony L. Lamb (born 1942)
• Allan – Harry Howard Barton Allan (1882–1957)
• Alleiz. – Aymar Charles d' Alleizette (1884–1967)
• Allemão – Francisco Freire Allemão e Cysneiro (1797–1874)
• Allred – Kelly Allred (born 1949)
• Alm – Carl Gustav Alm (born 1888)
• Á.Löve – Áskell Löve (1916–1994)
• Alphand – Jean-Charles Alphand (1817–1891)
• Alph.Wood – Alphonso Wood (1810–1881)
• Alpino – Prospero Alpino (1553–1617)
• Al-Shehbaz – Ihsan Ali Al-Shehbaz (born 1939)
• A.L.Sm. – Annie Lorrain Smith (1854–1937)
• Alston – Arthur Hugh Garfit Alston (1902–1958)
• Alstr. – Clas Alströmer (1736–1794)
• Altam. – Fernando Altamirano (1848–1908)
• Altschul – Siri von Reis (born 1931)
• A.Macedo – Amaro Macedo (born 1914)
• Amakawa – Tairoko Amakawa (born 1917)
• Amann – Johann Amann (1814–1878)
• Amaral – Ayrton Amaral (born 1948)
• A.Massal. – Abramo Bartolommeo Massalongo (1824–1860)
• A.Mathews – Andrew Mathews (1801–1841)
• Amberg – Otto Amberg (1875–1920)
• Ambronn – Hermann Ambronn (1856–1927)
• Ambrosetti – José Arturo Ambrosetti (born 1939)
• Ambrosi – Francesco Ambrosi (1821–1897)
• Ambroz – Josef Ambroz (1886–1950)
• A.M.Carter – Annetta Mary Carter (1907–1991)
• A.Meeuse – Adrianus Dirk Jacob Meeuse [es] (born 1914)
• Ameljcz. – V. P. Ameljczenko (born 1948)
• Ames – Oakes Ames (1874–1950)
• A.M.Gray – Alan Maurice Gray (born 1943)
• Amich – Francisco Amich García (born 1953)
• Amici – Giovanni Battista Amici (1786–1863)
• Amin – Amal Amin (born 1929)
• Amirkh. – Amirkhan Magomedovich Amirkhanov (born 1952)
• Amman – Johann Amman (1707–1741)
• Ammann – Morgane Ammann (born 1986)
• Ammerman – Elizabeth Ammerman (born 1917)
• Ammirati – Joseph F. Ammirati (born 1942)
• Amo – Mariano del Amo y Mora (1809–1896)
• Amor – Angel Amor Morales (born 1959)
• A.M.Ross – Alexander Milton Ross (1832–1897)
• Amshoff – Gerda Jane Hillegonda Amshoff (1913–1985)
• Amsler – Charles D. Amsler (born 1959)
• A.M.Sm. – Annie Morrill Smith (1856–1946)
• A.Murray – Andrew Dickson Murray (1812–1878)
• A.N.Danilov – Afanasij Nikolaevich Danilov (1903–1942)
• A.N.Demidov – Anatoly Nikolaievich Demidov, 1st Prince of San Donato (1813–1870)
• Andersen – Johannes Carl Andersen (1873–1962)
• Anderson – James Anderson (1738–1809)
• Andersson – Nils Johan Andersson (1821–1880)
• Andr. – Gábor Andreánszky (1895–1967)
• André – Édouard André (1840–1911)
• Andres – Heinrich Andres (1883–1970)
• Andrews – Henry Cranke Andrews (c. 1759–1835)^[8][9]
• Andriamih. – Tefy H. Andriamihajarivo (fl. 2011)
• Andronov – Nikolaĭ Matveevich Andronov (fl. 1955)
• Andrz. – Antoni Lukianowicz Andrzejowski [Wikidata] (1785–1868)
• A.Nelson – Aven Nelson (1859–1952) (A.Nels. is also used)
• A.Neumann – Alfred Neumann (1916–1973)
• Ångstr. – Johan Ångström (1813–1879)
• A.N.Henry – Ambrose Nathaniel Henry (born 1936)
• A.N.Rao – Abbareddy Nageswara Rao (born 1954)
• Ant.Juss. – Antoine de Jussieu (1686–1758)
• Ant.Molina – José Antonio Molina Rosito (born 1926)
• Antoine – Franz Antoine (1815–1886)
• Ant.Schott – Anton Schott (1866–1945)
• Apang – Ona Apang (fl. 2012)
• A.P.Br. – Andrew Phillip Brown (born 1951)
• A.Pearson – Arthur Anselm Pearson (1874–1954)
• A.Phelps – Almira Hart Lincoln Phelps (1793–1884)
• Applegate – Elmer Ivan Applegate (1867–1949)
• A.Pramanik – Arabinda Pramanik (born 1957)
• Apstein – Carl Heinrich Apstein (1862–1950)
• A.Q.Hu – Ai Qun Hu (fl. 2009)
• A.Raynal – Aline Marie Raynal (born 1937)
• A.R.Bean – Anthony Bean (born 1957)
• Arcang. – Giovanni Arcangeli (1840–1921)
• Archer – Thomas Croxen Archer (1817–1885)
• A.R.Clapham – Arthur Roy Clapham (1904–1990)
• Ard. – Pietro Arduino (1728–1805)
• Ardoino – Honoré Jean Baptiste Ardoino [Wikidata] (1819–1874)
• Arechav. – José Arechavaleta (1838–1912)
• A.Regel – Johann Albert von Regel (1845–1908)
• Arènes – Jean Arènes (1898–1960)
• Aresch. – Johan Erhard Areschoug (1811–1887)
• A.R.Ferguson – Allan Ross Ferguson (born 1943)
• Argent – Graham Charles George Argent [es] (born 1941)
• A.Rich. – Achille Richard (1794–1852)
• Arm. – Edward Armitage (1822–1906)
• Armari – Beatrice Armari (1877–1918)
• Arn. – George Arnott Walker Arnott (1799–1868)
• Arnell – Hampus Wilhelm Arnell (1848–1932)
• Arnold – Ferdinand Christian Gustav Arnold (1828–1901)^[10]
• A.Robyns – Andre Georges Marie Walter Albert Robyns [es] (1935–2003)
• A.R.Penfold – Arthur Raymond Penfold ( born 1890)
• Arráb. – Francisco Antonio de Arrábida [es] (1771–1850)
• Arruda – Manuel Arruda da Câmara (1752–1810)
• A.R.Sm. – Alan Reid Smith (born 1943)
• Arthur – Joseph Charles Arthur (1850–1942)
• Art.Mey. – Arthur Meyer (1850–1922)
• Arv.-Touv. – Casimir Arvet-Touvet (1841–1913)
• A.S.Calvert – Amelia Smith Calvert (1876–1965)
• Asch. – Paul Friedrich August Ascherson (1834–1913)
• A.Schatz – Albert Israel Schatz (1920–2005)
• A.Schenk – Alexander Schenk (1864–1924)
• A.Schimp. – Andreas Franz Wilhelm Schimper (1856–1901)
• A.Schlag. – Adolf Schlagintweit (1829–1857)
• A.Schlick. – August Schlickum (1867–1946)
• A.Schneid. – Albert Schneider (1863–1928)
• A.Schnyd. – Albert Schnyder (1856–1938)
• A.Schott – Arthur Carl Victor Schott (1814–1875)
• A.Schreib. – Annelis Schreiber (1927– 2010)
• A.Schultz – Arthur Schultz (1838–1915)
• A.S.Foster – Adriance S. Foster (1901–1973)
• A.S.George – Alex George (born 1939)
• Ashby – Edwin Ashby (1861–1941)
• Ashe – William Willard Ashe (1872–1932)
• Ashwin – Margot Bernice Ashwin (born 1935)
• A.Sinclair – Andrew Sinclair (1796–1861)
• Askerova – Rosa K. Askerova (born 1929)
• Asmussen – Conny Asmussen (fl. 1997)
• A.Soriano – Alberto Soriano (1920–1998)
• A.S.Rob. – Alastair Robinson (born 1980)
• Assem – J. van den Assem (fl. 1953)
• A.Stahl – Agustín Stahl (1842–1917)
• A.St.-Hil. – Augustin Saint-Hilaire (1799–1853)
• Aston – Helen Isobel Aston (born 1934)
• Aswal – B. S. Aswal (born 1948)
• A.Terracc. – Achille Terracciano [es] (1861–1917)
• A.T.Grimme – Arnold Grimme (1868–1958)
• Atha – Daniel E. Atha (born 1962)
• A.Thouars – Abel Aubert Dupetit Thouars (1793–1864)
• Atk. – William Sackston Atkinson (1821–1875)
• A.T.Lee – Alma Theodora Lee (1912–1990)
• Aubl. – Jean Baptiste Christophore Fusée Aublet (1720–1778)
• Aubrév. – André Aubréville [de; es; ru] (1897–1982)
• Aubriet – Claude Aubriet (1651–1742)
• Aucher – Pierre Martin Rémi Aucher-Éloy (1792–1838)
• Audib. – Urbain Audibert (1791–1846)
• Audubon – John James Audubon (1785–1851)
• Aug.DC. – Richard Émile Augustin de Candolle (1868–1920)
• Ausserd. – Anton Ausserdorfer (1836–1885)
• A.Usteri – Alfred Usteri (1869–1948)
• Austin – Coe Finch Austin (1831–1880)
• A.Vázquez – Antonio Vázquez (born 1961)
• A.V.Bobrov – Alexey Vladimir Bobrov (born 1969)
• A.V.Duthie – Augusta Vera Duthie (1881–1963)
• Avé-Lall. – Julius Léopold Eduard Avé-Lallemant (1803–1867)
• Aver. – Leonid Vladimirovich Averyanov [ru] (born 1955)
• Averyanova – Anna Leonidovna Averyanova (born 1981)
• A.V.Roberts – Andrew Vaughan Roberts (born 1940)
• A.Wall – Arnold Wall (1869–1966)
• A.Wallace – Alexander Wallace (1829–1899)
• A.W.Benn. – Alfred William Bennett (1833–1902)
• A.Weber – Anton Weber (born 1947)
• A.W.Hill – Arthur William Hill (1875–1941)
• A.W.Howitt – Alfred William Howitt (1830–1908)
• A.Wigg. – Heinrich August Ludwig Wiggers (1803–1880)
• A.W.Purdie – Andrew William Purdie (1940–1989)
• A.W.Russell – Anna Worsley Russell (1807–1876)
• Axelrod – Daniel I. Axelrod (1910–1998)
• Aymard - Gerardo Antonio Aymard Corredor [es] (born 1959)
• Ayres – William Port Ayres (1815–1875)
• Azara – Félix de Azara (1746–1821)