Taccaceae Dumort., 1829, nom. cons.
Tamaricaceae Link, 1821, nom. cons.
Reaurmuriaceae Ehrenb. ex Lindl., 1830
Tapisciaceae (Pax) Takht., 1987
Taxaceae Gray, 1821, nom. cons.
Amentotaxaceae Kudo & Yamam., 1931
Austrotaxaceae Nakai, 1938
Torreyaceae Nakai, 1938
Taxodiaceae
Tecophilaeaceae Leyb., 1862, nom. cons.
Conantheraceae (Endl. ex Meisn.) Pfeiff., 1873
Cyanellaceae Salisb., 1866
Tectariaceae Panigrahi, 1986
Aspidiaceae Burnett, 1835, nom. illeg.
Tepuianthaceae Maguire & Steyerm., 1981
Tetracarpaeaceae Nakai, 1943
Tetracentraceae A.C. Sm., 1945, nom. cons.
Tetrachondraceae Wettst., 1924
Tetragoniaceae Nakai, 1942, nom. cons.
Tetrameristaceae Hutch., 1959
Theaceae D. Don, 1825, nom. cons.
Camelliaceae DC., 1816
Gordoniaceae (DC.) Spreng., 1826
Malachodendraceae J. Agardh, 1858, nom. illeg.
Sladeniaceae (Gilg & Werderm.) Airy Shaw, 1964
Ternstroemiaceae Mirb. ex DC., 1816
Thelypteridaceae Pic. Serm., 1970
Themidaceae Salisb., 1866
Theophrastaceae Link, 1829
Thurniaceae Engl., 1907, nom. cons.
Thymelaeaceae Juss., 1789, nom. cons.
Aquilariaceae R. Br. ex DC., 1825
Daphnaceae Vent., 1799
Phaleriaceae Meisn., 1841
Thyrsopteridaceae C. Presl, 1847, nom. rej.
Ticodendraceae Gómez-Laur. & L.D. Gómez, 1991
Tiliaceae Juss., 1789, nom. cons.
Sparmanniaceae J. Agardh, 1858
Tofieldiaceae Takht., 1994
Torricelliaceae (Wang.) Hu, 1934
Tovariaceae Pax, 1891, nom. cons.
Trapaceae Dumort., 1829, nom. cons.
Trapellaceae Honda & Sakisaka, 1930
Tremandraceae R. Br. ex DC., 1824, nom. cons.
Tetrathecaceae R. Br., 1814
Tribelaceae (Engl.) Airy Shaw, 1964
Trichopodaceae Hutch., 1934, nom. cons.
Tricyrtidaceae Takht., 1997, nom. cons. prop.
Compsoaceae Horan., 1834, nom. rej. prop.
Trigoniaceae Endl., 1841, nom. cons.
Trigoniaceae Lindl., 1846, nom. cons.
Paridaceae Dumort., 1827
Trimeniaceae (Janet R. Perkins & Gilg) Gibbs, 1917, nom. cons.
Triuridaceae Gardner, 1843, nom. cons.
Lacandoniaceae E. Martínes & Ramos, 1989
Trochodendraceae Prantl, 1888, nom. cons.
Tropaeolaceae Juss. ex DC., 1824, nom. cons.
Cardamindaceae Link, 1831, nom. illeg.
Turneraceae Kunth ex DC., 1828, nom. cons.
Piriquetaceae Martinov, 1820
Typhaceae Juss., 1789, nom. cons.