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- Grose-Smith, Henley.
- Grosfils, Eric Francis.
- Groshans, George Philip Frederick, 1814-1874
- Grosiean, Stéphane
- Grosier, J.-B. (Jean-Baptiste), 1743-1823
- Grosjean, Henry, 1859-
- Grosjean, Marie
- Grosjean, Martin
- Grosjean, N.,
- Grosjean, Stéphane
- Grosman, Fabian
- Grosourdy, René de.
- Gross, A T H
- Gross, Alfred O. (Alfred Otto), 1883-1970
- Gross, Brandon A.,
- Gross, C.
- Gross, Caroline L.
- Gross, Daniel F.
- Gross, David L.,
- Gross, Eduardo
- Gross, Emanuel, 1948-
- Gross, Franz Josef
- Gross, Glenn
- Gross, Gordon F
- Gross, Heinrich
- Gross, Herbert
- Gross, Howard P.
- Gross, Hugo.
- Gross, J
- Gross, J.
- Gross, James B.
- Gross, John.
- Gross, Joyce
- Gross, Larry L.
- Gross, Le Roy
- Gross, Louis.
- Gross, Maria Claudia
- Gross, Paul R
- Gross, Paul S
- Gross, Paula
- Gross, Samuel D. (Samuel David), 1805-1884
- Gross, Vladimir
- Gross, Warren J
- Grossart, Hans-Peter
- Grossbeck, John A (John Arthur) 1883-1914
- Grosse Hovest, Anke
- Grosse, Friedrich Ernst, 1870-
- Grosse, G
- Grosse, Maël
- Große, Wolf-Rüdiger, 1947-
- Grosse-Brauckmann, H
- Grossek, G L
- Grosselet, Manuel Olivier
- Grossenbacher, Dena
- Grossenbacher, John Gasser, 1875-
- Grossenbacher, Karl A
- Grossenbacher, Kurt
- Grossenheider, Richard P
- Grosser, D
- Größer, Detlef
- Grosser, Emil, 1866-
- Grosser, Karin Martha
- Grosser, Wilhelm Carl Heinrich
- Große-Stoltenberg, André
- Grosseteste, Robert, 1175?-1253
- Grossfield, Joseph, 1940-1987
- Grossgeim, A. A. (Aleksandr Alfonsovich), 1888-1948
- Grossherzoglich Hessische Geologische Landesanstalt zu Darmstadt.
- Grosshuesch, David A
- Grossi, Bruno, 1977-
- Grossi, Everardo
- Grossi, Mariana A.
- Grossi, Paschoal Coelho, 1981-
- Grosskopf, William G.
- Grossman, Alice
- Grossman, C. M.
- Grossman, J. C.
- Grossman, Jake J. (Jacob Joseph)
- Grossman, James
- Grossman, Jeffrey N
- Grossman, Mary Louise
- Grossman, Nathaniel
- Grossman, R.
- Grossman, Scott C.
- Grossman-Clarke, Susanne
- Grossmann, Friedrich, 1866-
- Grossmann, J. P. (Joseph Penfound), 1864-1953
- Grossmann, Lars
- Grossmueller, David W.
- Grosso Gamboa, César A.
- Grosso, Bernadette
- Grosso, Giacomo
- Grosso, Jimena
- Grosso, Leonard L
- Grosso, Luis
- Grosso, Mónica
- Grosso, Valentina
- Grosso-Silva, José Manuel
- Grossouvre, A. de (Albert), 1849-
- Grossowicz, Nathan.
- Grosspietsch, Oskar
- Grossu, Alexandru V
- Grost, Geo.
- Grostal, Paul
- Grosvenor Museum (Chester, Cheshire).
- Grosvenor, Arthur, 1860-
- Grosvenor, Charles Henry, 1833-1917
- Grosvenor, Gilbert Hovey, 1875-1966
- Grosvenor, T H L
- Grosvenor, W
- Grote, Anna
- Grote, Arthur
- Grote, Augustus Radcliffe, 1841-1903
- Grote, Hermann
- Grotenfelt, Gösta, 1855-1922
- Grotenfelt, Paul
- Groth, B. H. A. (Benno Humbert Alfred), 1878-1967
- Groth, C. F.
- Groth, Christian F
- Groth, Doris
- Groth, Eric Gustaf,
- Groth, H
- Groth, H E(Mike)
- Groth, Jeffrey G.
- Groth, Mike
- Grothaus, Clarence E.
- Grother, Sheila
- Grothman, Gary T.
- Grothschiling, Benedict, 1686-1737
- Grothschiling, Benedict.
- Grothues, Thomas M.
- Grotjan, Johann August, 1777
- Grotlisch, V. E. (Victor Edward), 1889-
- Grotrian, Etta
- Grotta, Leonard D.
- Grotto, Eduardo
- Grottolo Marasini, Gabriele
- Grou, Eduardo
- Groue, Kj
- Groult, Marie-Laure
- Groult, Paul.
- Groundwater, W.
- Grousset, Fabienne
- Grout Seed & Plant Co.
- Grout, A. J. (Abel Joel), 1867-1947
- Grout, Jonathan, Jr., 1815-1882
- Grout, P
- Grout, William Wallace, 1836-1902
- Grouvelle, A
- Grouvelle, Ant
- Grouw, Hein van
- Grouzis, M
- Grove, A J
- Grove, Clayton
- Grove, Emily
- Grove, H. D.
- Grove, Jack
- Grove, Julie
- Grove, L R A
- Grove, Pearl Forest.
- Grove, Robert A.
- Grove, S
- Grove, Simon J
- Grove, W. B. (William Bywater), 1848-1938
- Grove, W. R. (William Robert), 1811-1896
- Grove, William R.
- Groveland Gardens (Orange, Calif.),
- Groveland Nurseries.
- Grover Gardens,
- Grover Nursery Company.
- Grover, Eulalie Osgood, 1873-1958
- Grover, Frederick Orville, 1868-1964
- Grover, John C
- Grover, Mark C.
- Grover, Nathan Clifford, 1868-1956
- Grover, R., 1927-
- Grover, Rachel
- Grover, V. Lee.
- Groves, C. P.
- Groves, C.P
- Groves, Colin P
- Groves, Craig
- Groves, D I
- Groves, Donald G.
- Groves, Enrico, 1835-1891
- Groves, Eric W
- Groves, Francis
- Groves, G W
- Groves, Henry, 1855-1912
- Groves, J. Walton (James Walton), 1906-1970
- Groves, James
- Groves, James
- Groves, Lindsey T.
- Groves, Madeleine
- Groves, Nancy C.
- Groveside Gardens.
- Grow, J W
- Growcott, Abraham
- Growers Exchange Inc.,
- Growers' Sales Co.
- Growers' Sales Co., Clinton, N. J.
- Growers' Sales Company.
- Growns, I. O. (Ivor O.)
- Growns, J E
- Growse, F S
- Growse, Frederic Salmon
- Groza, Mariana
- Grozdanov, Atanas
- Grozeva, Maria
- Grozeva, Neli
- Grozeva, Snejana
- Grözinger, Franziska
- Gru, Gio. Batta., approximately 1790-approximately 1825
- Grubb, E. H.
- Grubb, Elizabeth A. A.
- Grubb, P. J. (Peter J.)
- Grubb, Patric Louis Cedric
- Grubb, Peter, 1942-2006
- Grubb, Teryl G
- Grubb, Thomas C., Jr.
- Grubb, Violet M.
- Grubbs, Andrew G.
- Grubbs, Dean
- Grubbs, Jeffrey T.
- Grubbs, Samuel Bates, 1871-
- Grubbs, Scott A
- Grube & Nieuwland.
- Grube, Adolph Eduard, 1812-1880
- Grube, C J
- Grube, Martin
- Grube, Reiner
- Gruber, August, 1853-1938
- Gruber, Bernd
- Gruber, Calvin Luther 1864-1943
- Gruber, Caroline Vivian
- Gruber, Charles M.
- Gruber, Daniela
- Gruber, David F.
- Gruber, Hans-Jürgen
- Gruber, Jacob W.
- Gruber, Jurgen
- Gruber, Jürgen
- Gruber, Monica A. M.
- Gruber, Samuel H.
- Gruber, Simone
- Gruber, Ulrich
- Gruber, Vitus
- Gruber, Wenzel.
- Grubert, Mark A.