- Alpine Gardens and Nursery.
- Alpine Nurseries.
- Alpine Nursery (Woodbury, N.Y.)
- Alpini, Alpino, 1603?-1637
- Alpini, Prosper, 1553-1617
- Alpino, Isa G
- Alpuche Solís, AG
- Alqahtani, Fahad
- Al-Qahtni, Abdulmani H.
- Alqarni, Abdulaziz S.
- AlQthanin, Rahmah
- Alquini, Yedo
- Al-Quran, Saleh A.
- Al-Rasheid, Khaled A S
- Alraun, Roman
- Al-Razi, Hassan
- Alrefaei, Abdulwahed
- Al-Robaae, K
- Alroy, John
- Al's Glad Patch.
- Alsabi, Mohammad
- Al-Sadi, Abdullah
- Al-Sahlani, Kadhim
- Al-Salem, Abdullah M.
- Alsberg, Carl, 1877-1940
- Al-Shamlih, Mohammed
- Alshammari, Ahmed
- Al-Shehbaz, Ihsan A., (Ihsan Ali) 1939-
- Al-Sheikhly, Omar Fadhil
- Al-Shwaiman, Hind A.
- Al-Sirhan, Abdulrahman
- Al-Sofyani, A. A
- Alsop, Richard, 1761-1815
- Alsos, Inger Greve
- Alsted, Johann Heinrich, 1588-1638
- Alston, A. H. G. (Arthur Hugh Garfit)
- Alston, Charles Henry.
- Alston, Charles, 1683-1760
- Alston, Diane
- Alston, Edward R. (Edward Richard) 1845-1881
- Alston, Garwood
- Alston, Jesse M.
- Alston, Ralph E.
- Alston, Richard M. (Richard Moss)
- Alstott, Arlston W.
- Alström, Per
- Al-Suyūṭī, Muḥammad Al-Zaqīm.
- Alt, Karen S
- Alt, Thomas
- Alt. F. Clark (Firm)
- Altaba, Cristian R.
- Altamaha Nurseries.
- Altamirano Azurduy, Saúl
- Altamirano, Adison
- Altamirano, Alejandra
- Altamirano, Fernando
- Altamirano, Tomás A.
- Altamont poultry company, incorporated.
- Altamonte Nurseries.
- Altangerel, Perle.
- Altarejos, J
- Altash, Stela
- Altbäcker, V
- Altemuller, H.-J. (Hans-Jürgen) 1926-
- Alten, Johann Wilhelm von, 1770-1854
- Altena, Hector Livius van, zoologist
- Altenbach, Alexander Volker
- Altenbach, J. Scott
- Altenhofer, Ewald
- Alter Botanischer Garten Hamburg.
- Alter, Dinsmore 1888-1968
- Alter, S. Elizabeth.
- Altergott, Ethan
- Alteri, Charlotte H.
- Alterman, Lynn E
- Altermatt, Florian
- Altés, A
- Altes, Alberto
- Altesor, Alice
- Altevogt, Rudolph.
- Altex Nursery Co.,
- Alth, Alojzy, 1819-1886
- Alth, Titus von, 1830-1917
- Altha Hall Gardens (Firm)
- Alther, Roman
- Altherr, Edmond
- Altherr, Sandra
- Althoff, Sérgio Luiz
- Altier, Elena
- Altifirma Nursery.
- Altig, Ronald
- Altiner, Demir
- Altınordu, Fahim
- Altıoğlu, Yusuf
- Altken, J D
- Altman, Bob.
- Altman, Jon
- Altman, Philip L.
- Altman, Robert L.
- Altman, Robert M
- Altmann, Margaret
- Altmann, Richard.
- Altmann, Scott H
- Altner, Helmut
- Alto, Barry
- Altoé, B. F.
- Altoff, Leon
- Alton E. Randall (Firm)
- Alton, Eduard d', 1772-1840
- Alton, Eduard d', 1803-1854
- Altonaga, Kepa
- Altop, R. Craig.
- Altosaar, I.
- Altran, A. E.
- Altrichter, Mariana
- Altringham, J D
- Altson, A. M.
- Altstatt, G. E.
- Altum
- Altum, Bernard, 1824-1900
- Altuna, Álvaro
- Altuntas, Cemil
- Altwegg, M.
- Alù, Emiliano
- Aluja, Martín
- Alum, H. T.
- Alumbaugh, R. L.
- Aluthmuhandiram, Janith
- Alva H. Smith (Firm)
- Alva Y. Cathcart (Firm)
- Alva, Abundio Sag?stegui
- Alvalá, Regina Célia dos Santos
- Alvarado Castillo, Reyna
- Alvarado Ch., Elvira María
- Alvarado Fernández, Salustio
- Alvarado Gámez, Ana L
- Alvarado Gómez, O. G. (Omar Guadalupe)
- Alvarado Ibarra, Juana
- Alvarado Orellana, Sergio A.
- Alvarado Perez, Manuel
- Alvarado Reyes, Ernesto
- Alvarado Vázquez, Marco Antonio
- Alvarado, Carlos J.
- Alvarado, Diego F
- Alvarado, Ernesto.
- Alvarado, Fernando
- Alvarado, Gilbert
- Alvarado, Guillermo
- Alvarado, Juan José
- Alvarado, Mabel
- Alvarado, Manuel
- Alvarado, Norma Nolazco
- Alvarado, P
- Alvarado, Pablo
- Alvarado, Patricia I.
- Alvarado, Ronald H
- Alvarado, V.
- Alvarado-Cárdenas, Leonardo
- Alvarado-Cárdenas, Leonardo O.
- Alvarado-Castro, José Andrés
- Alvarado-Díaz, Javier
- Alvarado-Niño, Mónica
- Alvarado-Rodríguez, Olman
- Alvarado-Serrano, Diego.
- Alvarenga, A. S.
- Alvarenga, Allan
- Alvarenga, Amauri Alves de.
- Alvarenga, Cibele A.
- Alvarenga, Érika R. de
- Alvarenga, Eugenia C
- Alvarenga, Herculano M.F.
- Alvarenga, Lisi Dámaris Pereira
- Alvarenga, Marden A. de
- Alvarenga, Moacir
- Alvarenga, Renato L. M.
- Alvarenga, Roberta
- Alvarenga, Thiago Marinho
- Alvarez Alonso, José.
- Alvarez F., Carlos.
- Alvarez García, Deivys M.
- Alvarez Perez, José Angel
- Alvarez, Alicia
- Alvarez, Ana Carolina
- Alvarez, Ariane D.
- Alvarez, Astrid
- Alvarez, Belinda
- Alvarez, Blanca Beatríz
- Alvarez, Calvin Gale, 1943-
- Alvarez, Carlos
- Alvarez, Carolina
- Alvarez, Denisse
- Alvarez, Diana
- Alvarez, E.
- Alvarez, EJ. da S.
- Alvarez, Elizabeth
- Alvarez, Fernando
- Alvarez, Javier
- Alvarez, José, 1940-
- Alvarez, Juan Agustin
- Alvarez, Juan M
- Alvarez, Juliana M
- Alvarez, Laura I
- Alvarez, Leopoldo
- Alvarez, Luis
- Alvarez, Luisa
- Alvarez, M.
- Alvarez, Maria Paloma Jimenez
- Alvarez, Marvin Ray, 1936-
- Alvarez, Nadir
- Alvarez, Philippa R
- Alvarez, Rafael
- Alvarez, Ramón M.
- Alvarez,B.
- Alvarez-Baca, Jeniffer K.
- Alvarez-Cerrillo, Laura Regina
- Alvarez-Clare, Silvia
- Alvarez-Fuentes, Orlando
- Alvarez-Hernandez, S
- Alvarez-León, Ricardo
- Alvarez-Noguera, F
- Alvarez-Padilla, Fernando
- Alvarez-Uria, M
- Alvariño, Angeles
- Alvariño, Lorena
- Alvaro, Maria Chiara
- Alva-Valdivia, Luis M.
- Alveal Villena, Krisler
- Alveal, Katherine
- Alveal, Nicza
- Alvear, Marysol
- Alvear, Pablo A
- Alverny, André d'
- Alverson, A.H. (Firm)
- Alverson, Andrew Halstead, 1845-1916
- Alverson, Edward R
- Alverson, F. G.
- Alverson, William Surprison
- Alves Da Silva, Thaís
- Alves da Silva, Sandra Maria
- Alves De Deus, Jean P.
- Alves de Paula, Adriano
- Alves dos Santos, Daiane
- Alves dos Santos, Elaine
- Alves dos Santos, Isabel
- Alves dos Santos, Maurício Reginado
- Alves dos Santos, Núbia de Fátima
- Alves Junior, Valter Vieira
- Alves Modesto, George
- Alves, Abner H.S.
- Alves, ACA