- Alcalaï, Sasson, 1872-
- Alcalá-Moya, Graciela
- Alcalde Mosqueira, Judith Georgette
- Alcalde, Leandro
- Alcántar González, Fabiola Selene
- Alcántara Ayala, Othón
- ALCANTÁRA B., Fernando
- Alcántara Díaz, David
- Alcantara, Daniel Maximo Correa
- Alcântara, Enner Herenio de
- Alcântara, Joelma Moreira
- Alcántara, M
- Alcántara, María Rosas
- Alcantara, Mariana B.
- Alcántara-Carbajal, José Luis
- Alcántara-Flores, José Luis
- Alcántara-Razo, Edgar
- Alcântara-Rocha, RCG.
- Alcántara-Salinas, Graciela
- Alcántar-Mejía, Josiani
- Alcántar-Vázquez, Juan Pablo
- Alcântra, Antônio Flávio de Carvalho
- Alcantra, Eliana
- Alcantú, Gabriel
- Alcapán, Angélica C.
- Alcaraz, Carles
- Alcaraz, Francisco
- Alcaraz, Francisco José
- Alcaraz-Segura, Domingo
- Alcasid, G L
- Alcaydé, G
- Alcázar-Ruiz, José Antonio
- Alcenius, Otto, 1838-1913
- Alcher, Marc
- Alcionio, Pietro, 1487-1527
- Alcober, Oscar
- Alcocer Durán, Javier
- Alcocer, Gabriel V.,
- Alcocic, John
- Alcock, A. (Alfred), 1859-1933
- Alcock, F. J. 1888-1972
- Alcock, Gary
- Alcock, John, 1942-
- Alcock, N. H. (Nathaniel Henry), 1871-1913
- Alcock, Nicola
- Alcock, P. J.
- Alcock, Randal H. (Randal Hibbert), 1833-1885
- Alcock, Thomas
- Alcoforado Santos, Celina
- Alcoforado-Filho, Francisco Guedes
- Alcolado, Pedro M.
- Alcoreza, Pamela
- Alcorn, J L
- Alcorn, Janis B
- Alcorso, Jessica
- Alcorta, Belén
- Alcorta, Marcela
- Alcott, William A. (William Andrus), 1798-1859
- Alcova Nurseries.
- Alcover, Josep Antoni.
- Alcoverro, Teresa
- Aldabe, Joaquin
- Aldaco Nuncio, Rogelio
- Aldam, W. H.
- Aldama-Aguilera, Cristóbal
- Aldana Llanos, L.
- Aldana, Ana
- Aldana, Marcela
- Aldana-Madrid María L.
- Aldape-López, César Tonatiuh
- Aldasoro, Juan Jose
- Aldawood, Abdulrahman Saad
- Alday Redonnet, Tomás
- Alday, J. G.
- Aldazabal, Verónica
- Aldea, Cristian
- Aldea, Patricia
- Aldebron, Charlotte
- Alden & Littleford (Firm)
- Alden Fruit Preserving Company.
- Alden McNair Nurseries,
- Alden, Bradford Ripley, 1811-1870
- Alden, Cecil.
- Alden, Charles H. (Charles Harold), 1894-
- Alden, George J.
- Alden, Peter
- Alden, Raymond W.
- Alden, Roger, 1754-1836
- Alden, Stephen
- Alden, William C. (William Clinton), 1871-
- Alder, Hansueli
- Alder, Joshua, 1792-1867
- Alder, Thomas P.
- Alder, Viviana A.
- Alderete, Mariela
- Alderman, A R
- Alderman, DeForest Charles, 1914-
- Alderman, Stephen Charles
- Alderman, W. H. 1885-
- Alders, K.
- Alderslade, Philip, 1943-
- Alderson, Chantelle A
- Alderson, Edwin Alfred Hervey, Sir, 1859-1927
- Alderson, James S.
- Alderson, John (Entomologist)
- Alderson, John M.
- Alderson, Rosie.
- Alderson, Wolfram
- Alderweireldt, Mark
- Alderwerelt van Rosenburgh, C. R. W. K. van (Cornelis Rugier Willem Karel), 1863-1936
- Aldin, Cecil Charles Windsor, 1870-1935
- Aldini, Rinaldo Nicoli
- Aldini, Tobia, 17th cent-
- Aldinus, Tobias
- Aldis, Geoffrey K
- Aldobai, Shoki
- Aldon, Earl F.
- Aldous, A. E. (Alfred Evan), 1886-1938
- Aldous, S E
- Aldous, Shaler Eugene, 1900-
- Aldred, Angela
- Aldrich, Clarence.
- Aldrich, David V
- Aldrich, Frederick A
- Aldrich, Herschel C.
- Aldrich, Jeffrey R.
- Aldrich, John W. (John Warren), 1906-1995
- Aldrich, John Carlson
- Aldrich, John Merton, 1866-1934
- Aldrich, L B
- Aldrich, Mark
- Aldrich, Michele L
- Aldrich, Robert C.
- Aldrich, Robert Clement, 1922-
- Aldrich, T. H. (Truman Heminway), 1848-1932
- Aldrich's Nurseries.
- Aldrich-Wright, Janice Rae
- Aldrick, John M
- Aldridge Nursery,
- Aldridge, A. G.
- Aldridge, Beverlea M
- Aldridge, Cameron L.
- Aldridge, David C.
- Aldridge, Murray
- Aldridge, Richard J. (Richard John), 1945-2014
- Aldridge, Richard John
- Aldrige, A. G.
- Aldrovandi, Francesca Fontana.
- Aldrovandi, Ulisse, 1522-1605
- Aldryhim, Yousif
- Alduán, M
- Alducin-Chávez, Gerson
- Aldughayman, Majed
- Alec Henderson, Inc.
- Alécio, Márcio Rodrigo
- Alecrim, Alexandre Mascarenhas
- Alecrim, Viviani Pereira
- Alee, Shekh Khash
- Aleem, Abdul
- Alefaio, Semese
- Alefaio, Tataua
- Alegre, Manuel, 1768-1815
- Alegria Association.
- Alegría Olivera, J J
- Alegría Ruiz, Froylan
- Alegria, James.
- Alegro, Antun
- Al-Eisawi, D
- Aleixo, Alexandre
- Alejado, Michelle
- Alejandra Rocha, E
- Alejandre Rosas, Jorge Alberto
- Alejandre-Iturbide, G
- Alejandro, Grecebio Jonathan D
- Alejano-Monge, María Reyes
- Alejo-Plata, Carmen
- Aleksandrowicz, Oleg
- Alekseev, A.
- Alekseev, Alexander S
- Aleksic, I
- Aleksieva, Iliana
- Aleksiuk, Michael
- Aleluia, FTF.
- Alemán, M
- Alemán-Flores, Miguel
- Alemanni, María E
- Alemán-Ríos, Junángel
- Alemany, F
- Alembert, Jean Le Rond d', 1717-1783
- Alen, Theo van
- Alenbath, Mohan
- Alencar da Silva Santos, Ana Cláudia
- Alencar, Carlos E.R.D.
- Alencar, Fernando Hélio.
- Alencar, Isabel D. C. C.
- Alencar, Isagel D C C
- Alencar, J. W.
- Alencar, Jeronimo
- Alencar, Jurandyr da Cruz
- Alencar, Laura R.V. de
- Alencar, Letícia Barros de
- Alencar, Lucia M S
- Alencar, Monaliza dos Anjos
- Alencar, Nélson Leal
- Alencar, Ramilla Machado de
- Alencar, Raony M.
- Alencar, Ronildo Baiatone
- Alencar, Thiago Gondim
- Alencar, Thuanny Fernanda Braga
- Alencar, Victor
- Alencar, Yamile Benaion
- Alencastro, Francisca M. M. R. de.
- Alenitzin, Wladimir
- Aleosfoor, Maryam
- Alerich, Carol L.
- Ale-Rocha, Rosaly 1960-
- Alessandrello, A
- Alessandrello, Anna
- Alessandri, Arturo
- Alessandri, Innocente, 1741-1803
- Alessandrini, Alessandro
- Alessandrini, Antonio, 1786-1861
- Alessandro, Giuseppe d', duca di Pescolanciano.
- Alessio, C L
- Aléssio, Filipe M.
- Alessio, G
- Alevi, Kaio Cesar Chaboli
- Alevizos, A
- Alex Philip, Alen
- Alex Rodger (Firm)
- Alex, Jack F. 1928-
- Alex. Waldie (Firm)
- Alexander & Hammon.
- Alexander County Nurseries.
- Alexander Forbes & Co.
- Alexander Irving Heimlich (Firm),
- Alexander McConnell (Firm)
- Alexander P. Thomas Bulb Farms,
- Alexander Seed Co.
- Alexander Von Humboldt-Stiftung,
- Alexander, A Allan
- Alexander, A. B. (Alvin Burton) 1854-
- Alexander, A. S. (Alexander Septimus), 1860-1935
- Alexander, Abra
- Alexander, Agnes B. (Agnes Baldwin), 1875-1970
- Alexander, Anne J
- Alexander, Annie Montague, 1867-1950
- Alexander, B M
- Alexander, Billy G.
- Alexander, Bovd