- Caldwell Nurseries.
- Caldwell Nursery Co.
- Caldwell Seed and Supply Company.
- Caldwell the Woodsman Co.
- Caldwell, Broughton A.
- Caldwell, Bruce A.
- Caldwell, David K. (David Keller), 1928-1990
- Caldwell, E. (Edmund G.), 1852-1930
- Caldwell, E. R.
- Caldwell, Francis Cary
- Caldwell, Fredricka Ann
- Caldwell, G. T. (George Thornhill), 1891-1956
- Caldwell, George Chapman, 1834-1907
- Caldwell, H. C.
- Caldwell, Harry R.
- Caldwell, J. A.
- Caldwell, J. R.
- Caldwell, James
- Caldwell, Jan
- Caldwell, Janalee P. (Janalee Paige)
- Caldwell, John
- Caldwell, John D.
- Caldwell, John J.
- Caldwell, John K.
- Caldwell, John S. (John Stein)
- Caldwell, Joseph S. (Joseph Stuart), 1878-
- Caldwell, Keith.
- Caldwell, Larry D
- Caldwell, Marthajane
- Caldwell, Martyn M. (Martyn Matheus), 1941-
- Caldwell, Melba C. (Melba Carstarphen), 1921-1991
- Caldwell, Otis W. (Otis William), 1869-1947
- Caldwell, Patrick J.
- Caldwell, Review By: Otis W
- Caldwell, Robert, 1815-1887
- Caldwell, Ronald S.
- Caldwell, Roy L.
- Caldwell, Sandra L.
- Caldwell, Sarah S. A.
- Caldwell, W. H.
- Cale, David J.
- Cale, P. G.
- Caleb Boggs & Son.
- Caleb Boggs & Sons (Firm)
- Caleb Boggs (Firm)
- Caleb, John T. D.
- Caleca, Virgilio
- Caledonian Horticultural Society
- Calef, Cahrles E., 1947-2021
- Calef, George W. 1944-
- Caleffi, S.
- Calegari, Bárbara B.
- Calegário, Natalino
- Calegaro-Marques, Cláudia
- Calero, David
- Calero, Luis Alfredo
- Calero, Sara
- Calero-Mejía, Humberto
- Caletti, Patricia Vera
- Calfee, John E. (John Edward), 1875-
- Calfee, S. L.
- Calfuán, Melina Lorena
- Calgaro, Marcos Román
- Calgren, Oskar, 1865-1954
- Calheiros, Débora Fernandes
- Calhoon, T. H.
- Calhoun, Caitlin C
- Calhoun, John B. (John Bumpass ), 1917-1995
- Calhoun, John V., 1961-
- Calhoun, Ken
- Calhoun, Ronald Joel.
- Calhoun, Stuart W
- Calie, Patrick J
- Califano, Laura M.
- Califia, Debra.
- California Academy of Natural Sciences
- California Academy of Sciences
- California Academy of Sciences. Department of Botany.
- California Academy of Sciences. Dept. of Paleontology.
- California Agricultural Experiment Station.
- California Agricultural Experiment Station. Division of Agriculture and Natural Resources.
- California Arboretum Foundation.
- California Association of Medical Milk Commissions Davis, Ca.) 1910 Apr 18-
- California Avocado Association.
- California Botanical Society.
- California Botanical Society. Council.
- California Cactus Nursery.
- California Camellia Gardens,
- California Carnation Company.
- California Cooperative Oceanic Fisheries Investigations (Program)
- California dairy council.
- California Desert Planning Program (U.S.)
- California Electric Light Company.
- California Energy Commission.
- California Field Ornithologists.
- California Forest and Range Experiment Station.
- California Forest Experiment Station.
- California Fruit Growers' Convention (5th : 1885 : Losa Anfeles, Calif.)
- California Fruit Growers' Convention.
- California Fruit Growers Exchange.
- California Gray Whale Workshop San Diego, CA) 1972-
- California Institute of Technology.
- California Jungle Gardens,
- California Malacozoological Society.
- California medical association. Committee on medical topography, meteorology, endemics and epidemics.
- California Midwinter International Exposition San Francisco, Calif.) 1894-
- California Native Plant Society.
- California Native Plant Society. East Bay Chapter.
- California Native Plant Society. Kern Chapter.
- California Native Plant Society. Mount Lassen Chapter.
- California Nursery Co.
- California Promotion Committee
- California Riparian Systems Conference University of California, Davis) 1981-
- California Rose Company.
- California Roses, Inc.
- California Science Association.
- California Seed & Bulb & Co.
- California Seed & Plant Co.
- California Seed Company.
- California Seed Growers Association.
- California Seed House.
- California Seed, Bulb and Plant Company.
- California Silk Culture Association.
- California State Agricultural Society.
- California State Chamber of Commerce.
- California State Floral Society.
- California State Grange.
- California State Library.
- California State Mining Bureau.
- California State Park Commission
- California State University, Fullerton.
- California State University, Fullerton. Arboretum
- California State University, Fullerton. Arboretum.
- California State University, Fullerton. Department of Biological Sciences.
- California Wild Flower Nursery.
- California.
- California. Board of fish and game commissioners.
- California. Board of State Viticultural Commissioners.
- California. Board of State Viticultural Commissioners. Library.
- California. Commissioners of Fisheries.
- California. Committee on Internal Improvements
- California. Conservation Commission.
- California. Department of Fish and Game.
- California. Department of Fish and Game. Eastern Sierra and Inland Deserts Region.
- California. Department of Fish and Game. Inland, Deserts, and Eastern Sierra Division.
- California. Department of Fish and Game. Region 3.
- California. Department of Parks and Recreation.
- California. Department of Public Instruction.
- California. Department of Water Resources.
- California. Dept. of Water Resources.
- California. Division of Beaches and Parks.
- California. Division of entomology.
- California. Division of Fish and Game.
- California. Division of Forest Economics.
- California. Division of Forest Survey.
- California. Division of Forestry.
- California. Division of Mines and Geology
- California. Division of Mines.
- California. Division of Water Resources.
- California. Fish and Game Commission.
- California. Legislature, 1855. Senate.
- California. Legislature. Senate. Committee on Internal Improvements
- California. Marine Fisheries Branch
- California. Marine Resources Operations
- California. Office of State Veterinarian.
- California. Resources Agency.
- California. Stallion Registration Board.
- California. State Agricultural Society.
- California. State Board of Fish Commissioners.
- California. State Board of Forestry.
- California. State Board of Horticultural Commissioners.
- California. State Board of Horticulture.
- California. State board of horticulture. Division of entomology.
- California. State Board of Trade.
- California. State Commission of Horticulture.
- California. State Earthquake Investigation Commission.
- California. State Fisheries Laboratory
- California. State Horticultural Commission.
- California. State Relief Administration.
- California. State Veterinarian.
- California. State Water Resources Control Board.
- California. Surveyor General's Office
- Califre Martins, Caleb
- Caligaris, Luz Elena Garza
- Calijuri, Maria do Carmo, 1956-
- Calijuri, Maria Lúcia
- Calil, Patrícia
- Caliman, Adriano
- Calimares, Carlos
- Calinescu, R. J.
- Calió, M. F. A. (Maria Fernanda Aguiar)
- Caliri, Roslaine Faustino
- Calisaya Chuquimia, Percy
- Calisto, Viviana
- Calitz, Frikkie
- Calixto Méndez, Luis
- Calixto, João B. (João Batista), 1949-
- Calixto, Merilane da Silva
- Calixto-Feres, Mariana
- Calixto-Mosqueda, María
- Calizona Date Palm Nurseries, Inc.
- Caljouw, Caren A
- Calkin, David.
- Calkins & Brooks (Nurseries : Bricksburg, N.J.)
- Calkins, A. B.
- Calkins, Carrol O
- Calkins, Frank C. (Frank Cathcart), 1878-1974
- Calkins, Gary N. (Gary Nathan), 1869-1943
- Calkins, Hugh G.
- Calkins, Virgil F.
- Calkins, William Wirt, 1842-1914
- Call, C. A.
- Call, Douglas R. (Douglas Ruben), 1965-
- Call, Leland Everett, 1881-1969
- Call, Mayo W.
- Call, Mayo W. (Mayo White), 1931-2020
- Call, Neysa M.
- Call, Richard Ellsworth, 1856-1917
- Call, Ronald B.
- Call, S. W.
- Call, Samuel M.
- Calla Green Houses.
- Calla Greenhouses.
- Calla Quevedo, Liliana
- Calladine, Ainsley
- Callado, Cátia Henriques
- Callado, John Rey
- Callaghan, Allan Robert
- Callaghan, C
- Callaghan, Carolyn C. 1953-
- Callaghan, Christopher B.
- Callaghan, Corey
- Callaghan, Curtis J. (Curtis John)
- Callaghan, Eric
- Callaghan, J. L.
- Callaghan, Tony Martin
- Callaham, Mac A.
- Callaham, Robert Z.
- Callahan, Betty J
- Callahan, Frank
- Callahan, Hilary S.
- Callahan, J. A.
- Callahan, J. P.
- Callahan, J. R.
- Callahan, Jeffrey Edwin.
- Callahan, Joan R
- Callahan, Philip S., 1923-2006
- Callahan, Robert F.
- Callahan, Rosemary.
- Callamand, Odette, 1906-1995