- Debuhr, Larry
- Debus, Heinrich, 1824-1915
- Debus, Stephen J S
- Debusk, Charles
- Debusschere, Elisabeth
- Deby, Julien, 1827-1895
- DeByle, Norbert V.
- Decae, Arthur E.
- Decaëns, Thibaud
- Decaisne, Joseph, 1807-1882
- Decaisne, Pierre
- Decandido, Robert
- d'Eça-Neves, Fernanda Faraco
- Decapita, Michael E
- Decarie, R
- Decarli, Giovanni Bergamo
- De-Carvalhorgipe, Crizanto Brito
- Decary, Raymond, 1891-1973
- Decatur Nursery.
- Deccache, Lara
- Decco, Juber de
- Dececchi, T. Alexander,
- Decelle, J E
- Decelle, J. (Jean)
- Decembrio, Pier Candido, 1399-1477
- Decemson, Ht.
- Decerisy, J-L
- Decero, Kimberly
- Decew, Thomas C
- Dechambre, E
- Dechambre, Ed
- Dechambre, Roger-Paul 1935-2016
- Decharme, M
- Dechelle, Maxime
- Dechen, H. von (Heinrich), 1800-1889
- Decher, Jan
- Dechmann, Louis.
- Dechoum, Michele de Sá
- Dechruksa, Wivitchuta
- Decian, Vanderlei Secretti
- Deck, John
- Decken, Karl Klaus von der, freiherr, 1833-1865
- Decker, Alfred, 1871-
- Decker, Barbara S.
- Decker, Brenna L.,
- Decker, C.O.
- Decker, Cornelis Gerritsz, approximately 1620-1678
- Decker, D M
- Decker, David G
- Decker, Floyd Fiske, 1881-
- Decker, George Clemens, 1898-
- Decker, Henry F
- Decker, James A.
- Decker, João Siegfried
- Decker, Johann Matthias
- Decker, John P.
- Decker, John Wright, 1867-1907
- Decker, Karie L
- Decker, Kelly L.M
- Decker, Marcel Hugo
- Decker, Peter
- Decker, R.
- Decker, S. W. 1900-
- Decker-Hess, Janet.
- Deckert, G
- Deckert, Jürgen
- Deckert, K
- Deckert, Richard F.
- Decker-Walters, Deena S
- Deckler, W. C.,
- Deckock, C
- Decleer, K
- Declerc, C
- Declerck, Joram
- Decloitre, L
- Decock, C
- Decock, Cony
- Decock, Cony
- Decock, Wim
- Deconto, Leonardo R.
- Decorah Gladiolus Gardens.
- Decorative Designers (Firm)
- Decotte, Jean-Baptiste
- DeCou & Co.
- DeCou, Samuel O.
- Decoursey, George
- Decoursey, John D
- Decoursey, Patricia J
- Decraemer, Frieda
- Decraemer, Wilfrida
- Decrock, M E
- Decroix, L. J., approximately 1725-1815
- DeCroix, Louis Joseph, 1725-1815
- Decruw, Cedric
- Dedebant, G.
- Dedecca, Dalvo M
- DeDecker, Mary
- Dederer, Pauline H
- Dedes, J
- Dedham Nurseries, Inc.
- Dedie, O
- Dedov, Ivailo
- Dedrick, Benjamin William.
- Dee, Elaine Evans
- Deecke, Wilhelm
- Deedrick, Douglas W
- Deeds, Jonathan
- Deef, Lamiaa Elsayed Mokhtar
- Deegan, Linda
- Deegener, Paul, 1875-1949
- Deehing, Mark D
- Deekrachang, Chayajit
- Deeks, T W
- Deeleman, P R
- Deeleman-Reinhold, Christa L.
- Deeley, D. M. (David M.)
- Deem, B A
- Deem, Lesley S
- Deem, Sharon L.
- Deemer Floral Co.
- Deemer Floral Company.
- Deeming, J C
- Deeming, John E.
- Deen, Isaac van, 1804-1869
- Deeni, Yusuf
- Deep, Aman
- Deep, Jagdeep S
- Deepak, P K
- Deepak, V
- Deepen-Wieczorek, Antje
- Deephaven Nursery.
- Deepu, A V
- Deer Island Nurseries.
- Deer Lodge Glad Farm.
- Deer, R
- Deere & Co., Moline, Ill.
- Deere implement co., San Francisco.
- Deere, Nicolas
- Deerfield Nurseries.
- Deerfield Nursery Co.
- Deerfield Nursery Company.
- Deering Harvester Company.
- Deering Nurseries,
- Deering, Arthur Lowell.
- Deering, Charles, 1695?-1749
- Deering, R. A.
- Deering, Robert Lane, 1887-
- Deerlodge National Forest (Mont.)
- Deerr, Noël, 1874-
- Dees, Robert C.
- Deeti, Sudhakar
- Deets, G B
- Deevey, Georgiana B. (Georgiana Baxter), 1914-1982
- Defa, Yan
- Defagó, María T.
- DeFalco, Lesley A.
- Defant, Albert, 1884-1974
- DeFato, Joan
- Defaye, Danielle
- Defea, Bárbara Soledad
- Defehrt, A. J.,
- Defenders of Wildlife.
- Defeo, Omar
- Deferrari, Amelia
- Deferrari, Guillermo
- Defert, Henry, 1851-
- Deffinbaugh, Beth
- DeFilipps, Robert A.
- DeFino, Terry C.
- Defise, Stéphane
- Deflandre, Georges
- Deflandre-Rigaud, Marthe, 1902-1987
- Defler, Thomas
- Deflers, A., 1841-1921
- Defoe, Daniel, 1661?-1731
- Defoe, Don
- Defoe, Omar
- Deforest, Fred,
- Deforgues, François-Louis-Michel Chemin, 1759-1840
- Defran, R H
- Defrance, Jacques-Louis-Marin, 1758-1850
- DeFrees, D.
- Defreese, D
- Defren, George
- Defresne, Mme.
- Defur, Peter L., 1950-
- Degabriele, Godwin
- Degabrielle, R
- Degagny, Charles, 1838-1926
- Dégallier, Nicolas
- Degani, Ricardo Milanetti
- Degano, Claudia A. M.
- Degant, F D
- Degasperi, Maria I.
- Degawa, Yousuke
- Degbelo, Galvius
- Degefe, Ashenafi
- Degen, Árpád von, 1866-1934
- Degen, Edward 1852-1922
- Degen, Rosa
- Degener, Isa
- Degener, Otto, 1899-1988
- Degener, P
- Degenfeld-Schonburg, Kurt, 1838-1888
- Degenhardt, William G. (William George), 1926-
- Degenhardt-Goldbach, J.
- Degenkolb, H.
- Degens, D W Spencer E T
- DeGiorgi Brothers Co.,
- Degiorgis, L
- Degiovanni, Augusto
- Degland, Côme Damien, 1787-1856
- Degland, Jean-Vincent-Yves
- Degli, Ettore Arrigoni
- Deglow, E Keith
- Degma, Peter
- Degn, Hans Jorgen
- Degnan, Bernard M.
- Degnan, Patrick H
- Degner, Jacob F
- Degner, Mark A.
- deGraaf, Dirk A.
- DeGraaf, Richard M.
- Degrande, Jori
- Degrandi, G L
- Degrandi, Tiago
- Degrange, J. E.
- Degrati, Mariana
- Degrauw, John W.
- Degraw, W A
- Degreef, J
- Degreef, Jerome
- Degreef, Jérôme
- DeGreef, John D.
- DeGroot, Leo
- Degteva, Svetlana
- Degtjarenko, Polina
- Degtyarev, Maksim I.
- Deguchi, H
- Deguchi, R
- Deguchi, Yoshiaki
- Deguine, Jean-Philippe
- Degusta, David
- Dehadrai, P V
- DeHart, R. C.
- Deharveng, Louis
- Dehaut, Émile-Georges
- Dehaut, G
- Dehaut, Georges
- Dehaut, M G