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- Cristaldi, M
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- Cristaldo, Geucira
- Cristaldo, P. F.
- Cristaudo, Antonia
- Cristaudo, Antonia E.
- Cristescu, Bogdan
- Cristescu, Romane
- Cristiano, Luca
- Cristiano, Maykon P
- Cristina Dos Santos, Rafaela
- Cristina, Constantinescu
- Cristóbal, AJ
- Cristóbal, Carmen L.
- Cristóbal, L. Humberto
- Cristobo Rodríguez, Francisco Javier
- Cristofaro, Massimo
- Cristofori, Giuseppe de, 1803-1837
- Cristóvão, Edilson Colhera
- Criswell, David S.
- Critchell-Bullock, James C. 1898-1953
- Critchfield, Harry,
- Critchfield, Richard L
- Critchfield, William Burke
- Critchfields Evergreens,
- Critchley, R A
- Critchlow, Rob
- Critical Trends Assessment Program.
- Critical Trends Assessment Project.
- Critien, A
- Crittenden, L B
- Crittenden, Orlando
- Crittenden, Peter
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- Croall, Alexander, 1831-1860
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- Croat, Thomas B.
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- Crocker Flower Seed Company.
- Crocker Land Expedition (1913-1917)
- Crocker Land Expedition Collection.
- Crocker, A. (Abraham)
- Crocker, Annie B.
- Crocker, Ashton V.
- Crocker, Carlos E.
- Crocker, Carols E.
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- Crocker, George A., Mrs.
- Crocker, George G. (George Glover), 1843-1913
- Crocker, R
- Crocker, Templeton, 1884-1948
- Crocker, Walter James, 1885-
- Crocker, William G.
- Crocker, William, 1876-1950
- Crocker-Bedford, D. Coleman
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- Crocket, Roderick M., 1889-
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- Crockett, David R.
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- Croft, Darin A.
- Croft, Frank C.
- Croft, James R.
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- Croft, Pat
- Croft, Peter
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- Crohn, P. W.
- Croix Farms.
- Croix, Teodoro de, 1730-1791
- Croizat, Léon, 1894-1982
- Crokaert, Guillaume
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- Croll, R. H.
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- Crolla, Jeffrey P
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- Cromartie, William J.
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- Crombie Nursery.
- Crombie Rose Nursery,
- Crombie, Charles M. (Charles Mann), 1841-1884
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- Crombie, Ronald I.
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- Cromwell Glad Gardens.
- Cromwell Nursery.
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- Cromwell, T. R.
- Cromwell, Townsend.
- Cromwell's Gladiolus Gardens,
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- Cron, Glynis
- Cron, Glynis V
- Cronacher Dahlia Gardens,
- Cronacher, Elsie
- Cronacher, Fred
- Cronamere Alpine Nurseries.
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- Croneberg, A
- Croneis, Carey, 1901-1972
- Cronemberger, Áurea
- Cronemberger, Felipe Mendes
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- Crooke, William
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- Crookes, Steven
- Crookes, William, Sir, 1832-1919
- Crookham Company,
- Crooks, Grace W.
- Crooks, James
- Crooks, John S.
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- Crooks, Kevin
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- Crookshank, Edgar M. (Edgar March), 1858-1928
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- Crookston, R Kent
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- Croome, William, 1790-1860
- Crop Science Society of America.
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- Cropper, John Westray
- Cropper, S C
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- Crory, William Glenny.
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- Cros, Marie-Josée
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- Crosa, Orfeo
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- Crosby-Galván, María Magdalena
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- Crosman Bros. Co.
- Crosman Brothers Co.
- Crosman Brothers.
- Crosman Brothers'.
- Crosman Seed Co.
- Crosman Seed Company.
- Crosman, Charles F., 1865
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