Cabombaceae A. Rich., 1828, nom. cons.
Cactaceae Juss., 1789, nom. cons.
Cereaceae DC. & Spreng. (transl. W. Jameson), 1821
Opuntiaceae Martinov, 1820
Caesalpinioideae R. Br., 1814, nom. cons.
Bauhiniaceae Martinov, 1820
Cassiaceae Vest, 1818
Ceratoniaceae Link, 1831
Detariaceae (DC.) J. Hess, 1832
Swartzieae (DC.) Bartl., 1830
Calectasiaceae Endl., 1838
Callitrichaceae Link, 1821, nom. cons.
Stellariaceae MacMill., 1892, nom. illeg.
Calochortaceae Dumort., 1829
Calycanthaceae Lindl., 1819, nom. cons.
Buttneriaceae Barnh., 1895, nom. illeg.
Chimonanthaceae Perleb, 1838
Calyceraceae R. Br. ex Rich., 1820, nom. cons.
Boopidaceae Cass., 1816
Campanulaceae Juss., 1789, nom. cons.
Cyananthaceae J. Agardh, 1858
Cyphiaceae A. DC., 1839
Cyphocarpaceae (Miers) Reveal & Hoogl., 1996
Dortmannaceae Rupr., 1856
Jasionaceae Dumort., 1829
Lobeliaceae R. Br., 1817, nom. cons.
Nemacladaceae Nutt., 1842
Campynemataceae Dumort., 1829
Canellaceae Mart., 1832, nom. cons.
Winteranaceae Warb., 1895, nom. illeg.
Cannabaceae Endl., 1837, nom. cons.
Lupulaceae Link, 1831
Cannaceae Juss., 1789, nom. cons.
Canotiaceae Britton
Capparaceae Juss., 1789, nom. cons.
Cleomaceae Horan., 1834
Oxystylidaceae Hutch., 1969
Caprifoliaceae Juss., 1789, nom. cons.
Loniceraceae Vest, 1818
Cardiopteridaceae Blume, 1847, nom. cons.
Peripterygiaceae F.N. Williams, 1905
Caricaceae Dumort., 1829, nom. cons.
Papayaceae Blume, 1826, nom. illeg.
Carlemanniaceae Airy Shaw, 1965
Carpodetaceae Fenzl, 1841
Caryocaraceae Szyszyl., 1893, nom. cons.
Rhizobolaceae DC., 1824, nom. illeg.
Caryophyllaceae Juss., 1789, nom. cons.
Alsinaceae (Lam. & DC.) Bartl., 1825, nom. cons.
Cerastiaceae Vest, 1818
Corrigiolaceae (Dumort.) Dumort., 1829
Dianthaceae Vest, 1818
Herniariaceae Durande, 1782
Illecebraceae R. Br., 1810, nom. cons.
Lychnidaceae (Fenzl ex Endl.) Lilja, 1870
Ortegaceae Martinov, 1820
Paronychiaceae Juss., 1815
Polycarpaeaceae (DC.) Schur, 1866
Scleranthaceae Bercht. & J. Presl, 1820
Silenaceae (DC.) Bartl., 1825
Spergulaceae Adans., 1763
Stellariaceae Dumort., 1822
Casuarinaceae R. Br., 1814, nom. cons.
Cecropiaceae C.C. Berg, 1978
Celastraceae R. Br., 1814
Canotiaceae Airy Shaw, 1964
Chingithamnaceae Hand.-Mazz., 1932
Euonymaceae Juss. ex Bercht. & J. Presl, 1820
Hippocrateaceae Juss., 1811
Salaciaceae Raf., 1838
Siphonodontaceae (Croizat) Gagnep. & Tardieu ex Tardieu, 1951, nom. cons.
Celtidaceae Link, 1831
Centrolepidaceae Endl., 1836, nom. cons.
Devauxiaceae Dumort., 1829, nom. illeg.
Cephalotaceae Dumort., 1829, nom. cons.
Cephalotaxaceae Neger, 1907, nom. cons.
Ceratophyllaceae Gray, 1821, nom. cons.
Cercidiphyllaceae Engl., 1909, nom. cons.
Cheiropleuriaceae Nakai, 1928
Chenopodiaceae Vent., 1799, nom. cons.
Atriplicaceae Durande, 1782
Betaceae Burnett, 1835
Blitaceae Adans., 1763
Corispermaceae Link, 1831
Dysphaniaceae (Pax) Pax, 1927, nom. cons.
Polycnemaceae Menge, 1839
Salicorniaceae Martinov, 1820
Salsolaceae Menge, 1839
Spinaciaceae Menge, 1839
Chionographidaceae Takht., 1996
Chloranthaceae R. Br. ex Lindl., 1821, nom. cons.
Hedyosmaceae Caruel, 1881
Chrysobalanaceae R. Br., 1818, nom. cons.
Hirtellaceae Horan., 1847
Licaniaceae Martinov, 1820
Circaeasteraceae Hutch., 1926, nom. cons.
Cistaceae Juss., 1789, nom. cons.
Helianthemaceae G. Mey., 1836
Clethraceae Klotzsch, 1851, nom. cons.
Clusiaceae Lindl., 1836, nom. cons.
Ascyraceae Plenck, 1796
Bonnetiaceae (Bartl.) L. Beauv. ex Nakai, 1948
Calophyllaceae J. Agardh, 1858
Cambogiaceae Horan., 1834
Garciniaceae Bartl., 1830
Guttiferae Juss., 1789, nom. cons. et nom. alt.
Hypericaceae Juss., 1789, nom. cons.
Cneoraceae Link, 1831, nom. cons.
Chamaeleaceae Bertol., 1834, nom. illeg.
Cobaeaceae D. Don
Cochlospermaceae Planch., 1847
Colchicaceae DC., 1805, nom. cons.
Bulbocodiaceae Salisb., 1866
Merenderaceae Mirb., 1804
Columelliaceae D. Don, 1828, nom. cons.
Combretaceae R. Br., 1810, nom. cons.
Bucidaceae Spreng., 1825
Myrobalanaceae Martinov, 1820
Sheadendraceae Bertol., 1850
Terminaliaceae J. St.-Hil., 1805
Commelinaceae R. Br., 1810, nom. cons.
Cartonemataceae Pichon, 1946, nom. cons.
Ephemeraceae Batsch, 1802, nom. illeg.
Tradescantiaceae Salisb., 1807
Compositae Giseke
Connaraceae R. Br., 1818, nom. cons.
Cnestiaceae (Raf.) Raf., 1830
Convallariaceae Horan., 1834
Aspidistraceae Endl., 1841
Platymetraceae Salisb., 1866, nom. illeg.
Polygonataceae Salisb., 1866
Tupistraceae Schnizl., 1846
Convolvulaceae Juss., 1789, nom. cons.
Cressaceae Raf., 1821
Dichondraceae Dumort., 1829, nom. cons.
Erycibaceae Endl. ex Meisn., 1840
Humbertiaceae Pichon, 1947, nom. cons.
Poranaceae J. Agardh, 1858
Coriariaceae DC., 1824, nom. cons.
Cornaceae (Bercht. & J. Presl) Dumort., 1829, nom. cons.
Corokiaceae Kapil ex Takht., 1997
Corsiaceae Becc., 1878, nom. cons.
Corylaceae Mirb., 1815, nom. cons.
Carpinaceae Vest, 1818
Corynocarpaceae Engl., 1897, nom. cons.
Costaceae (Meisn.) Nakai, 1941
Crassulaceae DC., 1805, nom. cons.
Cotyledonaceae Martinov, 1820
Rhodiolaceae Martinov, 1820
Sedaceae Adans., 1763
Sempervivaceae Durande, 1782
Tillaeaceae Martinov, 1820
Croomiaceae Nakai, 1937
Crossosomataceae Engl., 1897, nom. cons.
Cruciferae Juss.
Crypteroniaceae A. DC., 1868, nom. cons.
Henslowiaceae Lindl., 1835
Ctenolophaceae (H. Winkl.) Exell & Mendonça, 1951
Cucurbitaceae Juss., 1789, nom. cons.
Bryoniaceae Adans., 1763
Cyclantheraceae Lilja, 1870
Nhandirobaceae T. Lestib., 1826
Zanoniaceae Dumort., 1829
Culcitaceae Pic. Serm., 1970
Cunoniaceae R. Br., 1814, nom. cons.
Baueraceae Lindl., 1830
Belangeraceae J. Agardh, 1858
Callicomaceae J. Agardh, 1858
Cupressaceae Rich. ex Bartl., 1830, nom. cons.
Actinostrobaceae Lotsy, 1911
Callitraceae (Mast.) Seward, 1919
Cryptomeriaceae Gorozh, 1904
Cunninghamiaceae Siebold & Zucc., 1842
Juniperaceae Bercht. & J. Presl, 1820
Metasequoiaceae Hu & W.C. Cheng, 1948
Microbiotaceae Nakai, 1938
Sequoiaceae Luerss., 1877
Taiwaniaceae Hayata, 1932
Taxodiaceae Warm., 1884, nom. cons.
Tetraclinaceae Hayata, 1932
Thujaceae Burnett, 1835
Thujopsidaceae Bessey, 1907
Curtisiaceae (Harms) Takht., 1987
Cuscutaceae (Dumort.) Dumort., 1829, nom. cons.
Cyanastraceae Engl., 1900, nom. cons.
Cyatheaceae Kaulf., 1827
Alsophilaceae C. Presl, 1847
Cycadaceae Pers., 1807, nom. cons.
Cyclanthaceae Dumort., 1829, nom. cons.
Cyclocheilaceae Marais, 1981
Nesogenaceae Marais, 1981
Cymodoceaceae N. Taylor, 1909, nom. cons.
Cynomoriaceae (Schott & Endl.) Lindl., 1833, nom. cons.
Cyperaceae Juss., 1789, nom. cons.
Caricaceae Burnett, 1835, nom. illeg.
Kobresiaceae Gilly, 1952
Papyraceae Burnett, 1835
Scirpaceae Batsch, 1786
Cyrillaceae Endl., 1841
Cytinaceae (Brongn.) A. Rich., 1824