| Cactaceae | * |
Acanthanthus
| Y. Itô | The Cactaceae 354 | 1981 |
| Cactaceae | |
Acanthocalycium
| Backeb. | Kaktus-ABC 224, 412 | 1935 |
| Cactaceae | ! |
Acanthocephala
| Backeb. | Blätt. Kakteenf. 1938(6): [22], [23] | 1938 |
| Cactaceae | |
Acanthocereus
| (Engelm. ex A. Berger) Britton & Rose | Contr. U.S. Natl. Herb. 12(10): 432 | 1908-1909 [1909] |
| Cactaceae | |
Acantholobivia
| Backeb. | Cactaceae (Berlin) 1941(2): 76 | 1942 |
| Cactaceae | * |
Acanthopetalus
| Y. Itô | Explan. Diagr. Austroechinocactinae 141, 292 | 1957 |
| Cactaceae | * |
Acanthorhipsalis
| Kimnach | Cact. Succ. J. (Los Angeles) 55(4): 177–181 | 1983 |
| Cactaceae | ! |
Acanthorhipsalis
| (K. Schum.) Britton & Rose | Cact. 4: 211 | 1923 |
| Cactaceae | ! |
Acharagma
| (N.P. Taylor) Glass | Guía Identific. Cactá. Amenazadas México 1: [1]AC/AG | 1997 |
| Cactaceae | |
Acharagma
| Zimmerman ex Glass | Guía Identific. Cactá. Amenazadas México 1: AC/AG | 1998 [1997] |
| Cactaceae | |
Airampoa
| Frič | Akklim. Versuchs-Gart. 1 | 1933 |
| Cactaceae | |
Akersia
| Buining | Succulenta (Netherlands) 1961: 25 | 1961 |
| Cactaceae | |
Ancistrocactus
| (K. Schum.) Britton & Rose | Cact. 4: 3–4 | 1923 |
| Cactaceae | |
Andenea
| Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 34 | 1835 |
| Cactaceae | |
Andinopuntia
| Guiggi | Cactology 2(Suppl.): 1 | 2011 |
| Cactaceae | |
Anhalonium
| Lem. | Cact. Gen. Sp. Nov. 1 | 1839 |
| Cactaceae | |
Anisocereus
| Backeb. | Blätt. Kakteenf. 1938(6): [8, 21] | 1938 |
| Cactaceae | ** |
Aparadoa
| Vliet | Succulenta (Netherlands) 65(4): 86 | 1986 |
| Cactaceae | |
Aporocactus
| Lem. | Ill. Hort. 7: Misc. 67–68 | 1860 |
| Cactaceae | |
Aporocereus
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 39 | 1935 |
| Cactaceae | |
Arequipa
| Britton & Rose | Cact. 3: 100–101 | 1922 |
| Cactaceae | |
Arequipiopsis
| Kreuz. & Buining | Repert. Spec. Nov. Regni Veg. 50: 20, 198 | 1941 |
| Cactaceae | |
Ariocarpus
| Scheidw. | Bull. Acad. Roy. Sci. Bruxelles 5(8): 491–492, f. 1–5 | 1838 |
| Cactaceae | |
Armatocereus
| Backeb. | Blätt. Kakteenf. 1938(6): [21] | 1938 |
| Cactaceae | ! |
Arrojadoa
| Britton & Rose | Cact. 2: 170 | 1920 |
| Cactaceae | !! |
Arthrocereus
| A. Berger | Kakteen 337 | 1929 |
| Cactaceae | * |
Arthrocereus
| Backeb. & F.M. Knuth | Kaktus-ABC 211 | 1935 |
| Cactaceae | |
Astrophytum
| Lem. | Cact. Gen. Sp. Nov. 3 | 1839 |
| Cactaceae | |
Aulacothele
| Monv. ex Lem. | | |
| Cactaceae | ** |
Aureilobivia
| Frič ex Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 33 | 1935 |
| Cactaceae | |
Austrocactus
| Britton & Rose | Cact. 3: 44 | 1922 |
| Cactaceae | |
Austrocephalocereus
| Backeb. | Blätt. Kakteenf. 1938(6): [22] | 1938 |
| Cactaceae | |
Austrocylindropuntia
| Backeb. | Blätt. Kakteenf. 1938(6): [3, 21] | 1938 |
| Cactaceae | |
Aylostera
| Speg. | Anales Soc. Ci. Argent. 96: 75 | 1923 |
| Cactaceae | |
Aztekium
| Boed. | Monatsschr. Deutsch. Kakteen-Ges. 1: 52 | 1929 |
| Cactaceae | |
Azureocereus
| Akers & H. Johnson | Cact. Succ. J. (Los Angeles) 21: 133 | |
| Cactaceae | |
Backebergia
| Bravo | Anales Inst. Biol. Univ. Nac. México 24(2): 230–231 | 1953 [1954] |
| Cactaceae | |
Banfiopuntia
| Guiggi | Cactology 2(Suppl.): 1 | 2011 |
| Cactaceae | |
Bartschella
| Britton & Rose | Cact. 4: 57–58, f. 55, t. 7, f. 6 | 1923 |
| Cactaceae | |
Bergerocactus
| Britton & Rose | Contr. U.S. Natl. Herb. 12(10): 435 | 1908-1909 [1909] |
| Cactaceae | |
Bergerocereus
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 18 | 1935 |
| Cactaceae | |
Binghamia
| Britton & Rose | Cact. 2: 167 | 1920 |
| Cactaceae | |
Bisnaga
| Orcutt | Cactography 1 | 1926 |
| Cactaceae | |
Blossfeldia
| Werderm. | Kakteenkunde 1937: 162 | 1937 |
| Cactaceae | |
Bolivicactus
| Doweld | Sukkulenty 3(1–2): 62 | 2000 |
| Cactaceae | |
Bolivicereus
| Cárdenas | Cact. Succ. J. (Los Angeles) 23: 91 | 1951 |
| Cactaceae | |
Bonifazia
| Standl. & Steyerm. | Publ. Field Mus. Nat. Hist., Bot. Ser. 23(2): 66 | 1944 |
| Cactaceae | |
Borzicactella
| H. Johnson ex F. Ritter | Kakteen Südamer. 4: 1385 | 1981 |
| Cactaceae | |
Borzicactus
| Riccob. | Boll. Reale Orto Bot. Palermo 8: 261 | 1909 |
| Cactaceae | |
Borzicereus
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 39 | 1935 |
| Cactaceae | |
× Borzipostoa
| G.D. Rowley | Natl. Cact. Succ. J. 37(2): 47 | 1982 |
| Cactaceae | |
Brachycalycium
| Backeb. | Cactaceae (Berlin) 1941 (2): 76, 78 | 1942 |
| Cactaceae | |
Brachycereus
| Britton & Rose | Cact. 2: 120–121, f. 179–180 | 1920 |
| Cactaceae | ! |
Brasilicactus
| Backeb. | Cactaceae (Berlin) 2: 76 | 1942 |
| Cactaceae | |
Brasilicereus
| Backeb. | Blätt. Kakteenf. 1938(6): [8, 22] | 1938 |
| Cactaceae | |
Brasiliopuntia
| (K. Schum.) A. Berger | Entwicklungslin. Kakt. 17 | 1926 |
| Cactaceae | |
Brasiliparodia
| F. Ritter | Kakteen Südamer. 1: 144 | 1979 |
| Cactaceae | ** |
Brasilocactus
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 19 | 1935 |
| Cactaceae | |
Bravocactus
| Doweld | Sukkulenty 1: 22 | 1998 |
| Cactaceae | ** |
Bridgesia
| Backeb. | Blätt. Kakteenf. 1935(12): [1] | 1935 |
| Cactaceae | |
Brittonia
| Houghton & C.A. Armstr. | Cact. J. (Croydon) 2: 64 | 1934 |
| Cactaceae | |
Brittonrosea
| Speg. | Anales Soc. Ci. Argent. 96: 69 | 1923 |
| Cactaceae | |
Browningia
| Britton & Rose | Cact. 2: 63, f. 92–94 | 1920 |
| Cactaceae | |
Buiningia
| Buxb. | Kakteen (H. Krainz) 46–47: C IV | 1971 |
| Cactaceae | |
Cactodendron
| J.M. Bigelow | | |
| Cactaceae | *** |
Cactus
| L. | Sp. Pl. 1: 466 | 1753 |
| Cactaceae | |
Calymmanthium
| F. Ritter | Kakteen And. Sukk. 13: 24 | 1962 |
| Cactaceae | ! |
Carnegiea
| Britton & Rose | J. New York Bot. Gard. 9(107): 187–188 | 1908 |
| Cactaceae | |
Castellanosia
| Cárdenas | Cact. Succ. J. (Los Angeles) 23: 90 | 1951 |
| Cactaceae | |
Cephalocereus
| Pfeiff. | Allg. Gartenzeitung 6(18): 142 | 1838 |
| Cactaceae | |
Cephalocleistocactus
| F. Ritter | Succulenta (Netherlands) 1959: 108 | 1959 |
| Cactaceae | |
Cephalomamillaria
| Frič | Ceskoslov. Zahradn. Listy 1924: 120 | 1924 |
| Cactaceae | |
Cephalomammillaria
| Frič | Život v Přír. 29: 9 | 1925 |
| Cactaceae | |
Cephalophorus
| Lem. | Cact. Aliq. Nov. 7 | 1838 |
| Cactaceae | |
Cereus
| Mill. | Gard. Dict. Abr. (ed. 4) 1: | 1754 |
| Cactaceae | ** |
Chaffeyopuntia
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 42 | 1935 |
| Cactaceae | |
Chamaecereus
| Britton & Rose | Cact. 3: 48 | 1922 |
| Cactaceae | |
Chamaelobivia
| Y. Itô | Explan. Diagr. Austroechinocactinae 289 | 1957 |
| Cactaceae | |
Chiapasia
| Britton & Rose | Cact. 4: 203, f. 206 | 1923 |
| Cactaceae | |
Chiapasophyllum
| Doweld | Sukkulenty 4(1-2): 32 | 2001 [2002] |
| Cactaceae | ** |
Chichipia
| Backeb. | Liste Cact. 12 | 1950 |
| Cactaceae | |
Chilenia
| Backeb. | Blätt. Kakteenf. 1938(6): [21] | 1938 |
| Cactaceae | |
Chileniopsis
| Backeb. | Kaktus-ABC 283, 416 | 1935 |
| Cactaceae | ** |
Chileocactus
| Frič | Kaktusár 2: 21 | 1931 |
| Cactaceae | |
Chileorebutia
| Frič ex F. Ritter | Cactus (Paris) 14(Suppl.): [5] | 1959 |
| Cactaceae | |
Chilita
| Orcutt | Cactography 1926(1): 2 | 1926 |
| Cactaceae | |
Cinnabarinea
| Frič ex F. Ritter | Kakteen Südamer. 2: 633 | 1980 |
| Cactaceae | |
Cintia
| Kníže & Říha | Kaktusy 31(2): 35 | 1995 |
| Cactaceae | |
Cipocereus
| F. Ritter | Kakteen Südamer. 1: 54 | 1979 |
| Cactaceae | ** |
Cirinosum
| Neck. | Elem. Bot. 2: 84 | 1790 |
| Cactaceae | ** |
Clavarioidia
| Frič & Schelle ex Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 41 | 1935 |
| Cactaceae | |
Cleistocactus
| Lem. | Ill. Hort. 8: Misc. 35 | 1861 |
| Cactaceae | |
× Cleistocana
| G.D. Rowley | Bradleya 12: 5 | 1994 |
| Cactaceae | |
Cleistocereus
| Frič & Kreuz. | Verz. Amer. Sukk. Rev. Syst. Kakteen 39 | 1935 |
| Cactaceae | |
Clistanthocereus
| Backeb. | Cactaceae (Berlin) 1937(1): 24 | 1937 |
| Cactaceae | |
Cochemiea
| (K. Brandegee) Walton | Cact. J. (London) 2: 50 | 1899 |
| Cactaceae | |
Cochiseia
| W. Earle | Saguaroland Bull. 30: 65 | 1976 |
| Cactaceae | |
Coleocephalocereus
| Backeb. | Blätt. Kakteenf. 1938(6): [22] | 1938 |
| Cactaceae | |
Coloradoa
| Boissev. & C. Davidson | Colorado Cacti 54 | 1940 |
| Cactaceae | |
Consolea
| Lem. | Rev. Hort. (Paris) 1862: 174 | 1862 |