- Antrim, Ernest Irving.
- Antropov, A V
- Antropov, Alexander V.
- Antunes Azevedo, Ricardo
- Antunes de Mattos, Luciana
- Antunes Sampaio, Ana Lúcia
- Antunes, Alexsander Zamorano
- Antunes, Aloisio José
- Antunes, Carlos
- Antunes, Cauan
- Antunes, Fabiano F.
- Antunes, Kelly
- Antunes, LEC.
- Antunes, Luciana dos Santos
- Antunes, Mariana
- Antunes, Marina Venzon
- Antunes, Octavio Augusto Ceva
- Antunes, Pedro
- Antunes, Sandra
- Antunes, Suélen Ferreira
- Antunes-Carvalho, Caio
- Antunez, Karina
- Antúnez-Fonseca, Cristopher A
- Antweiler, J. C., 1918-
- Anuar, Saiful
- Anuar, Shahrul
- Añuber, Rylle
- Anufriev, G A
- Anugrah, Nunu
- Anunciação Filho, Clodoaldo José Da
- Anunciação Vilhalva, Divina Aparecida
- Anunciacao, Erica Moema Silva da
- Anunciação, Paula Ribeiro
- Anupama, Krishnamurthy
- Anuradha, C.
- Anuradha, R
- Anuradha, S
- Anuruk, Kanruetai
- Anusarnsunthorn, V
- Anville, Jean Baptiste Bourguignon d', 1697-1782
- Anwandter, Carlos
- Anwar, Ayesha
- Anwar, Irmah
- Anwar, M. A.
- Anwar, Prince
- Anwar, Sheikh Muhammad Farhan
- Anwarali Khan, Faisal Ali
- Anweiler, Gary G.
- Anzaldo, Salvatore
- Anzi, M
- Anzotegui, Luisa Matilde
- Ao, Cheng Ce
- Ao, J Meren
- Aoi, Wataru
- Aoki, Akemi
- Aoki, C
- Aoki, Camila
- Aoki, Jun-Ichi
- Aoki, Katherine A. A.
- Aoki, Keiji
- Aoki, Kouta
- Aoki, Kunihiro
- Aoki, Masakazu
- Aoki, Shigeyuki
- Aomori-ken Ringo Shikenjō.
- Aona, Lidyanne
- Aona, Lidyanne Yuriko Saleme
- Aonuma, Hitoshi
- Aoonkum, Anuwat
- Aosis Publishing.
- Aoto, Tomoji
- Aotsuka, Tadashi
- Aouad, N
- Aouadj, Sid Ahmed
- Aouali, Souhila
- Aoutti, Amani
- Aowphol, Anchalee
- Aoya, Kokichi
- Aoyagui, ASM.
- Aoyama, Elisa M.
- Apa, Anthony D
- Apablaza, J U
- Apadodharanan, Subramanian
- Aparecida Duarte Silveira, Raphaela
- Aparecida Ronqui, Raquel
- Aparecida-Vallim, Magui
- Apari, Péter
- Aparici Seguer, Vicente
- Aparicio E., James
- Aparicio Juan, Antonio.
- Aparicio, A
- Aparicio, Brian Cunningham
- Aparicio, J
- Aparicio, James
- Aparicio, José M.
- Aparicio, Juan P
- Aparicio, K. M.
- Aparicio, M. Teresa
- Aparicio, Maria Teresa
- Aparicio-Fernández, Xochitl
- Aparico, M. T.
- Apáthy, István,
- Apavatjrut, P
- Apaza, José
- Apaza, Lilian
- Apel, John R.
- Apelete, Eben-Ezer
- Apelja, Eleonora
- Apenborn, Rico
- Apert, Eugène, 1868-1940
- Apesteguía, Sebastián.
- Apetz, J. H.
- Apex Plant Company,
- Apfelbach, Raimund
- Apfelbaum, Liliana I
- Apfelbaum, S I
- Apfelbeck, Viktor, 1859-1934
- Apgar, A. C. (Austin Craig), 1838-1908
- Apgar, E. A. (Ellis Ayres), 1836-1905
- Apgar, Sarah
- Apgaua, Deborah
- Aphane, Mmamphe
- Aphonin, Matheus 1739-1810
- Apinda-Legnouo, Emelie Arlette
- APIRAKSENA, KITJA
- Aplaca, Jed L
- Aplet, Gregory H
- Apley, Martyn L
- Aplin, D
- Aplin, K. P. (Kenneth Peter), 1958-
- Aplin, Ken
- Aplin, O V
- Aplin, O. V. (Oliver Vernon), 1858-1940
- Apodaca, C K
- Apodaca, María José
- Apolinar, Alejandro
- Apolinario, Cristiane
- Apolinário, Júlio César Gama
- Apolinar-Maria, Brother,
- Apollinaire-Marie, Brother
- Apollonio, Marco
- Apollonius, of Perga.
- Apollonov, M K
- Apon, J. F.
- Apone, Fernando
- Aponte Diaz, M
- Aponte, Ameris,
- Aponte, Guillermo León
- Aponte, Juan José
- Aponte, N E
- Aponte, Orlando
- Aponte-Gutiérrez, Andrés
- Aportela-Cortés Daniel
- Apostolidés, M N
- Apóstolo, Nancy Mariel
- Apostolopoulou, Evangelia
- Apostolov, A
- Apostolov, Apostol
- Apostolova, Iva
- Apostolova, Margarita
- Apostolova-Stoyanova, Nadezhda
- Apothéloz-Perret-Gentil, Laure
- App, Bernard Auman, 1906-
- App, Frank, 1886-
- Appadoo, Chandani
- Appalachian Evergreen Company,
- Appalachian Forest Experiment Station (Asheville, N.C.)
- Appalachian Fruit Research Station (Kearneysville, W. Va.)
- Appalachian Mountain Club.
- Appalachian Nurseries,
- Appalachian Nursery.
- Appalasamy, Suganthi
- Apparao, M R
- Appayya, M K
- Appel, A G
- Appel, Oliver.
- Appel, Otto, 1867-1952
- Appelhans, A D
- Appelhans, Marc
- Appelius, F. L. (Federigo Luigi), 1835-1876
- Appell, Paul, 1855-1930
- Appellöf, Jakob Johan Adolf, 1857-
- Appels, J
- Appeltans, Ward
- Appert, Nicolas, 1749-1841
- Appezzato-da-Glória, Beatriz
- Appiah‑madson, Hannah J.
- Appino, Jon D
- Apple Grove Nurseries.
- Apple, Jennifer L
- Apple, Larry,
- Apple, Russell A
- Applebaum, S W
- Appleby, Bridget M.
- Appleby, James E.
- Appleby, M C
- Appleby, M E
- Appleby, R M
- Appleby, Thomas.
- Applegate, Deborah R.
- Applegate, Elmer Ivan, 1867-1949
- Applegate, Richard L.
- Applegate, Roger D.
- Applegate, Shelton P.
- Appleman, Charles O
- Applequist, Wendy
- Appleton, Belinda.
- Appleton, Christopher C
- Appleton, E S Bullas
- Appleton, Francis H.
- Appleton, Francis Henry.
- Appleton, Harold C.,
- Appleton, Lewis.
- Appleton, Robyn D.
- Appleton, William S.
- Appleyard, VCL.
- Applied Aquatic Studies Workshop.
- Applied Aquatic Studies Workshop. Edmonton, Alberta) 1989-
- Applin, Esther R.
- Applin, J S
- Appolinário, Vivette
- Appolloni, Massimo
- Appoloni, A. M.
- Appoloni, Carlos Roberto
- Apps, Clayton D.
- Apps, G. J.
- Apps, P. J.
- Appukuttan, K K
- Appun, Carl Ferdinand, 1820-1872
- Appy, Ralph Grant, 1949-
- Aprea, Gennaro
- Apreval, A.R. D' fl 1880-1920
- Aprile, Fabio M. (Fabio Marques)
- Aprilia, Ina
- Apriyanto, Dwinardi
- Apruzzese, Massimiliano
- Apstein, C. (Carl Heinrich), 1862-1950
- Apstein, Carl
- Apt, Kirk
- Apte, D A
- Apte, Deepak
- Apte, Sharad
- Apthorpe, M
- Aptroot, André
- Apuleius Barbarus.
- Apún-Molina, Juan Pablo
- Apunte, Katherine
- Apurillo, Carlo Chris
- Aputen, Angelico
- Aqdus, Fauzia