- Trichas, Apostolos
- Trichell, Spencer
- Trichkova, Teodora
- Trichter, Valentin, ca 1685-ca 1750
- Tricker, Charles L.
- Tricker, William, 1852-1916
- Triclot, Marie-Pierre
- Tridball, Dr.
- Tridon, André, 1877-1922
- Triebel, Dagmar
- Triebel, Richard, 1859-
- Trierveiler-Pereira, Larissa
- Triest, C.,
- Triest, Ludwig
- Trietsch, Carolyn
- Triffitt, Margaret
- Trifonov, Vladimir
- Trifunov, Sonja
- Triger, Jacques.
- Trigg, Christine
- Trigg, M B
- Trigg, William M.
- Triggerson, C. J.
- Triggs, Barbara
- Triggs, H. Inigo (Harry Inigo), 1876-1923
- Trigo Trigo, Juan E.
- Trigo, A. Verónica
- Trigo, Jose R
- Trigoboff, Norman
- Trigos Peral, Gema
- Trigos, Ángel
- Trigoso, Sebastião Francisco de Mendo, 1773-1821
- Trigos-Peral, Gema
- Trigt, Herman van
- Trigueros Bañuelos, Azucena Gabriela
- Trigunayat, M. M.
- Trikha, Chander K
- Trikojus, Victor Martin
- Trikojus,, Victor Martin
- Trilar, Tomi
- Trilles, Jean-Paul
- Trillmich, Fritz, 1948-
- Trillo, Alejandro
- Trillo, Cecilia
- Trillo, Mariana C
- Trimbell, Fern.
- Trimble, George R.
- Trimble, Henry, 1853-1898
- Trimble, Isaac Pim.
- Trimble, J
- Trimble, Jeremiah
- Trimble, John J. III
- Trimble, Ruth
- Trimen, Henry, 1843-1896
- Trimen, Roland, 1840-1916
- Trimmer, Joshua Kirby.
- Trimmer, Mary.
- Trimmer, Sarah, 1741-1810
- Trimper, Perry G.
- Trinajstic, Kate
- Trinchese, Salvatore, 1836-1897
- Trinci, Cosimo
- Trinco, Alberto
- Trindade Bezerra, Juliana Maria
- Trindade Oliveira, Martha
- Trindade Trindade, Claudio Rossano
- Trindade, Denise C.
- Trindade, Diego P. F.
- Trindade, Helena
- Trindade, Jorge Antônio da
- Trindade, Márcia Emília de Jesus
- Trindade, Oziel
- Tringali, Lionello P.
- Tringali, Luca
- Tringali, Michael
- Trinh, Binh
- Trinidad And Tobago. Department of Agriculture.
- Trinidad and Tobago. Dept. of Agriculture
- Trinidad and Tobago. Dept. of Agriculture.
- Trinidad Field Naturalists' Club.
- Trinidad, Huber
- Trinidad. Botanical Dept.
- Trinidad-Santos, Antonio
- Trinity College (Dublin, Ireland). Botanic Gardens.
- Trinity County (Calif.) Natural Resource Division.
- Trinity River Restoration Program.
- Trinius, Carl Bernhard, 1778-1844
- Trinkaus, Erik
- Trinkaus, J. P.
- Trinkle, M. S.
- Trintinaglia, Lauren
- Trinzen, Manfred
- Tripathi, A. K.
- Tripathi, Rishikesh
- Tripathi, S. D.
- Tripathy, A. P.
- Tripathy, Basudev
- Tripet ainé.
- Triple F Garden,
- Triplebrook Dahlia Gardens.
- Triplehorn, Bruce W.
- Triplehorn, Charles A.
- Triplehorn, D. M.
- Triplett, D. C.
- Triplett, Edward L
- Triplett, Jimmy K.
- Triplett, Kirsten
- Triplett, W. H. (William H.), 1836-
- Triplitt, Ray
- Tripodi, Amber
- Tripole, Susana
- Tripotin, Pierre
- Tripp, Alan.
- Tripp, Bruce W.
- Tripp, Frances Elizabeth, 1832-1890
- Tripp, Jay J.
- Tripp, Joseph W.
- Tripp, Kim E.
- Tripp, Kimberly J
- Tripp, M. R.
- Tripp, Pamela
- Tripp, Ronald P. (Ronald Pearson), 1914-
- Tripp, William Henry, 1880-1959
- Trippel And Barrow Peony Farms,
- Trippel, Albert W.
- Tripp-Quezada, Arturo
- Trique, B
- Triquell, A.
- Triques, Mauro L.
- Trischitta, A
- Trischler, Jürgen
- Trisciuzzi, Nicola
- Triseleva, Tatiana A.
- Triska, Maggie D.
- Trisolini, R
- Trist, Nicholas Philip, 1800-1874
- Trist, Robert E.
- Tristam, W. Outram
- Tri-state forestry conference Indianapolis) 1919-
- Tri-State Seed Company,
- Tristkam, H B
- Tristram, Canon
- Tristram, H. B. (Henry Baker), 1822-1906
- Tristram-Valentine, J. T.
- Tritschler, Charles Henry, 1865-
- Tritschler, Joseph Patrick, 1950-
- Trivalairat, Poramad
- Trivedi, Jigneshkumar N.
- Trivedi, M. H.
- Trivedi, Pranav
- Trivedi, Pratibha P.
- Trivedi, Varsha
- Trivedi, Yogendra
- Trivelpiece, Wayne
- Trivett, John.
- Trivett's Tested Seeds Inc.
- Trivi de Mandri, Matilde E.
- Trivinho-Strixino, Susana
- Triyutthachai, Natthawut
- Trizna, Michael
- Trlica, M. J. (Milton Joseph), 1942-
- Trnka, Filip
- Trnski, T. (Tom)
- Trobbiani, Gastón Andres
- Troccoli, Alberto
- Troccoli, Luis
- Trochain, Jean
- Trochain, Yvonne.
- Trochain-Marquès, J
- Trochain-Marquès, Y
- Troche Souza, Carlos
- Trochet, Audrey
- Trochet, John A
- Trochine, Carolina
- Trock, Debra K.
- Troeger, Edna Beatrice
- Troeger, John W. (John Winthrop), 1849-
- Troemner, Allan,
- Troendle, Charles A.
- Troendle, Jean
- Troeung, B M
- Trofimova, T. A. (Tatʹi︠a︡na Aleksandrovna)
- Tröger, Daniel
- Trógolo, Alicia
- Trogstad, Kirsten
- Troguer, Alysson
- Troia, Angelo
- Troiani, Héctor O.
- Troiano, Fernando
- Troilius, Adolf Magnus, 1838-1909
- Trois, Cesar Augusto da Cunha
- Troitsky, Aleksey
- Troitzky, A
- Trojan, Emanuel, 1878-
- Trojan, Johannes, 1837-1915
- Trojan, Przemyslaw
- Troje, Nikolaus F
- Trolin, Gustaf
- Trollope, Frederick Hamilton,
- Trollope, Jeffrey
- Trombetta, Gian Luigi
- Trombetta, Louis D
- Trombik, Jiří
- Trombin, Daiane Fabris
- Tromble's Nursery.
- Trombotto Liaudat, Dario
- Trombulak, Stephen C
- Trompenaars, H. J. A. J.
- Trompowsky, Patrick Marques
- Tromsø Museum (Norway)
- Tromsø museum.
- Tronchet, Antonin-Benoît-Joseph
- Tronchet, Frédéric
- Troncin, J. P.
- Troncon, E. K.
- Troncos, Jesus S
- Troncoso Castro, J. Max
- Troncoso Rojas, Rosalba
- Troncoso, Alejandro
- Troncoso, Andrea
- Troncoso, Jesús S.
- Troncoso, José
- Troncoso, Nicolas
- Troncoso, Paulina A.
- Troncoso, Víctor A.
- Troncoso-Olivo, Walberto
- Troncoso-Palacios, Jaime
- Troncy, Pierre Maurice
- Trondle, Charles
- Trôndlé, Jean
- Trono, Daniele
- Trono, Gavino
- Tronolone, Valquiria Baddini
- Trontelj, Peter
- Troop, James, 1853-1941
- Troop, Judith E
- Troost, Alison I.
- Troost, Gerard, 1776-1850
- Tropea, Gioele
- Tropea, R.
- Tropek, Robert
- Tropical and Subtropical Agriculture Research Program (U.S.)
- Tropical Flowerland,
- Tropical Gardens (Firm : San Gabriel, Calif.)
- Tropical Groves Nursery,
- Tropical Nursery Co.
- Tropp, J. M.
- Troschel, F. H. (Franz Hermann), 1810-1882
- Troschel, Hugo,
- Troschel, J Müller F H