Thelocactus (K. Schumann) Britton & Rose, Bulletin of the Torrey Botanical Club 49: 251, 1922

Thelocactus aguirreanus (Glass & R.A. Foster) H. Bravo Hollis, Cact. Suc. Mex., 25 (3): 65: 1980

Thelocactus beguinii N.P. Taylor, Bradleya; Yearbook of the British Cactus and Succulent Society 1: 113, 1983

Thelocactus bicolor (Galeotti ex Pfeiffer) Britton & Rose, Bulletin of the Torrey Botanical Club 49 (8): 251, 1922

Thelocactus bicolor ssp. bicolor 

Thelocactus bicolor ssp. bolaensis (Runge) A.B. Doweld, Sukkulent (Moscow), 1999 (1): 30: 1999

Thelocactus bicolor ssp. commodus (R. Haas) A.B. Doweld, Sukkulent (Moscow), 1999 (1): 30: 1999

Thelocactus bicolor ssp. flavidispinus (Backeberg) N.P. Taylor, Cactaceae Consensus Initiatives 5: 14, 1998

Thelocactus bicolor ssp. schwarzii (Backeberg) N.P. Taylor, Cactaceae Consensus Initiatives 5: 14, 1998

Thelocactus bicolor v. heterochromus 

Thelocactus bicolor v. pottsii (Galeotti) Britton & Rose, Cactaceae (Backeberg) 5: 2809., 1961

Thelocactus bicolor v. schottii (Engelmann) Krainz, Kakteen (H. Krainz) 18: C VIIIb., 1961

Thelocactus bicolor v. schwarzii

Thelocactus bicolor v. texensis Backeberg, Cactaceae (Backeberg) 6: 3872., 1962

Thelocactus bicolor v. tricolor (K. Schumann) F. M. Knuth in Backeberg & F. M. Knuth, Kaktus-ABC 358., 1935

Thelocactus bicolor v. wagnerianus (Berger) Krainz in Krainz, Kakteen (H. Krainz) 18: C VIIIb., 1961

Thelocactus buekii (Klein) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 8, f. 6, 1923

Thelocactus conothelos (Regel & J. Klein) Backeberg & F.M. Knuth, Kaktus-ABC 358, 1935

Thelocactus conothelos ssp. argenteus (C. Glass & R.A. Foster) C. Glass, Guía Identific. Cact. Amenazadas México, 1: Th/con ssp. argenteus (1998 publ.): 1997

Thelocactus conothelos ssp. aurantiacus (C. Glass & R.A. Foster) C. Glass, Guía Identific. Cact. Amenazadas México, 1: Th/con ssp. aurantiacus (1998 publ.): 1997

Thelocactus conothelos ssp. conothelos  

Thelocactus conothelos v. argenteus

Thelocactus conothelos v. aurantiacus

Thelocactus conothelos v. macdowellii (Rebut ex Quehl) G. Glass & R. Foster, Cact. Succ. J. (U. S. A.), 49 (5): 220, 1977

Thelocactus crassihamatus (A. Weber) W. T. Marsh., W. T. Marsh. & T. M. Bock, Cactaceae, 169, in obs., 1941

Thelocactus dasyacanthus (Engelmann) W. T. Marsh., Cact. Journ. Brit. 9. 28, 1947

Thelocactus durangensis (Ruenge) G.D. Rowley, Excelsa, 12: 31: 1986

Thelocactus ehrenbergii (Pfeiffer) F. M. Knuth, Backeb. & F. M. Knuth, Kaktus-ABC, 359., 1935

Thelocactus erectocentrus (J. M. Coulter) W. T. Marsh., Cact. Journ. Brit. 9. 28, 1947

Thelocactus flavidispinus (Backeberg) Backeberg, Cact. & Succ. Journ. Amer. 23. 150, 1951

Thelocactus flavus A. Mosco & C. Zanovello, Cactus & Co., 3 (1): 20, 22, 1999

Thelocactus fossulatus (Scheidweiler) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 10, f. 9, 1923

Thelocactus freudenbergii  

Thelocactus garciae C. Glass & M.L. Mend., C. E. Glass, Guía Identific. Cact. Amenazadas México, 1: Th/ga (1998 publ.), 1997

Thelocactus gielsdorfianus (Werdermann) W. T. Marsh., Cact. Journ. Brit. 9. 28; vide Gray Herb. Card Cat., 1947

Thelocactus goldii H. Bravo Hollis, Anales del Instituto de Biologia de la Universidad Nacional de Mexico 26: 23, 1955

Thelocactus hastifer (Werdermann & Boedeker) F.M. Knuth, Kaktus-ABC 360, 1935

Thelocactus hertrichii (Weinberg) Borg, Cacti, ed. 2, 347, 1951

Thelocactus heterochromus (F.A.C. Weber) van Oosten, Kakteenkunde 1940: 59, 1940

Thelocactus heterochromus v. fossulatus  

Thelocactus heterochromus v. longispinus 

Thelocactus hexaedrophorus (Lemaire) Britton & Rose, Bulletin of the Torrey Botanical Club 49 (8): 251, 1922

Thelocactus hexaedrophorus ssp. hexaedrophorus 

Thelocactus hexaedrophorus ssp. lloydii (Britton & Rose) Kladiwa & Fittkau, Die Kakteen 61: CVIIIb, 1975

Thelocactus hexaedrophorus v. decipiens (A. Berger) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 29: 1996

Thelocactus hexaedrophorus v. droegeanus (Hildmann ex K. Schumann) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 29: 1996

Thelocactus hexaedrophorus v. fossulatus (Scheidweiler) Backeberg, Cactaceae (Backeberg) 5: 2800., 1961

Thelocactus hexaedrophorus v. labouretianus (K. Schumann) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 30: 1996

Thelocactus hexaedrophorus v. lloydii

Thelocactus hexaedrophorus v. major (Quehl) Y. Ito, Cacti (Borg), 94. 1952, 1952

Thelocactus hexaedrophorus v. paradensis J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 31, without latin descr. or type, 1996

Thelocactus hexaedrophorus v. roseiflorus 

Thelocactus horripilus (Lemaire) Kladiwa & Fittkau, Kakteen, 61: CVIIIb, 1975

Thelocactus intertextus (Engelmann) W. T. Marsh., Cact. Journ. Brit. 9. 28, 1947

Thelocactus johnsonii (Parry ex Engelmann) W. T. Marsh., Cact. Journ. Brit. 9. 28, 1947

Thelocactus knuthianus (Boedeker) W. T. Marsh., Cact. Journ. Brit. 9. 28; vide Gray Herb. Card Cat., 1947

Thelocactus krainzianus Oehme, Beitr. Sukkulentenk. u. Pflegc, 1., 1940

Thelocactus krausei (Hildmann ex K. Schumann) Kelsey & Dayton, Standard. Pl. Names (ed. 2), 78., 1942

Thelocactus lausseri J. Riha & J. Busek, Kakteen und Andere Sukkulenten 37 (8): 164, 1986

Thelocactus leucacanthus (Zuccarini) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 8-9, f. 7, 1923

Thelocactus leucacanthus f. krainzianus (Oehme) H. Nagl, Kakt. And. Sukk., 42 (8): 183: 1991

Thelocactus leucacanthus ssp. schmollii (Werdermann) A. Mosco & C. Zanovello, Cactaceae Consensus Initiatives, 7: 18: 1999

Thelocactus leucacanthus v. ehrenbergii (Pfeiffer) H. Bravo Hollis, Cact. Suc. Mex., 25 (3): 65: 1980

Thelocactus leucacanthus v. porrectus (Lemaire) Backeberg, Cactaceae (Backeberg) 5: 2818., 1961

Thelocactus leucacanthus v. sanchezmejoradae (J. Meyr) Backeberg, Cactaceae (Backeberg) 5: 2817., 1961

Thelocactus leucacanthus v. schmollii

Thelocactus lloydii Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 11, 1923

Thelocactus lloydii f. major Rowland cat. 2001 

Thelocactus longispinus 

Thelocactus lophophoroides Werdermann, Kakteenk., 176., 1934

Thelocactus lophothele (Salm-Dyck) Britton & Rose, Bulletin of the Torrey Botanical Club 49 (8): 251, 1922

Thelocactus lophothele v. longispina  

Thelocactus lophothele v. nidulans (Quehl) Kladiwa & Fittkau, Kakteen, 61: CVIHb, 1975

Thelocactus macdowellii (Rebut ex Quehl) W.T. Marshall, Cactus Journal [London] 9: 28, 1947

Thelocactus macrochele  

Thelocactus macrochele v. schwarzii  

Thelocactus mandragora A. Berger, Kakteen, 255, 346., 1929

Thelocactus matudae H. Sanchez-Mejorada & A.B. Lau, Cactaceas y suculentas mexicanas 23 (3): 51, 1978

Thelocactus mcdowellii (Rebut sx Quehl) Glass, Cact. & Suc. Mexic. 14. 4, 22, 1969

Thelocactus multicephalus J.J. Halda & Panarotto, Acta Mus. Richnov. Sect. Nat., 5 (1): 40, 1998

Thelocactus nidulans (Quehl) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 9, f. 8, 1923

Thelocactus panarottoanus J.J. Halda, Acta Mus. Richnov. Sect. Nat., 5 (4): 161, 1998

Thelocactus phymatothelos (Poselger in Foerster) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 8, f. 5, 1923

Thelocactus porrectus (Lemaire) F. M. Knuth, Backeb. & F. M. Knuth, Kaktus-ABC, 361., 1935

Thelocactus pottsii (Salm-Dyck) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 12-13, 1923

Thelocactus pseudopectinatus (Backeberg) E. P. Anders. & Boke, Amer. Journ. Bot. 56. 326, 1969

Thelocactus rinconensis (Poselger) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 7, f. 4, 1923

Thelocactus rinconensis ssp. freudenbergeri (R. Haas) A. Mosco & C. Zanovello, Cactaceae Consensus Initiatives, 7: 18: 1999

Thelocactus rinconensis ssp. hintonii J.M. Lüthy, Kakteen und Andere Sukkulenten 48 (2): 39, 1997

Thelocactus rinconensis ssp. multicephalus (Halda & Panar.) J.M. Lüthy, Kakt. And. Sukk., 50 (4): 80: 1999

Thelocactus rinconensis ssp. nidulans (Quehl) C. Glass & R.A. Foster, Sukkulent (Moscow), see Glass, Guía Identific. Cact. Amazadas México, 1999 (1): 30 (1999), isonym; 1: Th/rin subsp. hintonii (1998 publ.): 1997

Thelocactus rinconensis ssp. phymatothele (Poselger ex C.F. Först.) C.E. Glass, Guía Identific. Cact. Amenazadas México, 1: Th/rin ssp. hintonii (1998 publ.): 1997

Thelocactus rinconensis ssp. phymatothelos (Poselger ex Ruemp.) C. Glass & R.A. Foster, Sukkulent (Moscow), 1999 (1): 30: 1999

Thelocactus rinconensis ssp. rinconensis  

Thelocactus rinconensis v. freudenbergeri

Thelocactus rinconensis v. nidulans

Thelocactus rinconensis v. phymatothele

Thelocactus roseanus (Boedeker) Borg, Cacti, 282, 1937

Thelocactus sanchezmejoradai J. Meyran, Cactaceas y suculentas mexicanas 3 (4): 78, f. 48, 1958

Thelocactus saueri (Boedeker) Kelsey & Dayton, Standard. Pl. Names (ed. 2), 78., 1942

Thelocactus saussieri (Weber) A. Berger, Kakteen, 346, 1929

Thelocactus saussieri v. longispinus Y. Ito, The Cactaceae: 527, without type, 1981

Thelocactus schmolii 

Thelocactus schottii (Engelmann) Kladiwa & Fittkau, Kakteen, 61: CVIIIb, 1975

Thelocactus schwarzii Backeberg, Cactus Journal [London] 12: 81, 1950

Thelocactus ser. Ancistrocactoides A.B. Doweld, Sukkulent (Moscow), 1999 (1): 31., 1999

Thelocactus ser. Bicolores (Kladiwa) A.B. Doweld, Sukkulent (Moscow), 1999 (1): 30: 1999

Thelocactus setispinus (Engelmann) E.F. Anderson, Bradleya; Yearbook of the British Cactus and Succulent Society 5: 59, 1987

Thelocactus setispinus v. cachetianus (Labour.) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 42: 1996

Thelocactus setispinus v. hamatus (Muehlenpf.) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 42: 1996

Thelocactus setispinus v. mierensis (K. Schumann) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 42: 1996

Thelocactus setispinus v. orcuttii (K. Schumann) J. Pilbeam, Thelocactus (Cactus File Handbook, 1): 42: 1996

Thelocactus smithii (Muehlenpf.) Borg, Cacti, ed. 2, 346, 1951

Thelocactus subterraneus Backeberg, Kakteenfreund (Mannheim) 1: 110-111, 1932

Thelocactus subterraneus v. zaragosae (Glass & R.A. Foster) H. Bravo Hollis, Cact. Suc. Mex., 25 (3): 65: 1980

Thelocactus tulensis (Poselger) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 11, f. 10, 1923

Thelocactus tulensis ssp. buekii (Klein) N.P. Taylor, Cactaceae Consensus Initiatives 5: 14, 1998

Thelocactus tulensis ssp. matudae (Sanchez-Mejorada & A.B. Lau) E.F. Anderson, Bradleya; Yearbook of the British Cactus and Succulent Society 5: 66, 1987

Thelocactus tulensis ssp. tulensis 

Thelocactus tulensis v. buekii

Thelocactus tulensis v. longispinus Y. Ito, The Cactaceae: 526, without type, 1981

Thelocactus tulensis v. matudae

Thelocactus uncinatus (Gal.) W. T. Marsh., W. T. Marsh. & T. M. Bock, Cactaceae, 169, in obs., 1941

Thelocactus uncinatus v. wrightii (Engelmann) Kelsey & Dayton, Standard. Pl. Names (ed. 2), 78., 1942

Thelocactus unguispinus (Eng.) G.D. Rowley, Excelsa, 12: 30: 1986

Thelocactus valdezianus (Moller), Cacti, 285, 1937

Thelocactus viereckii (Werdermann) H. Bravo Hollis, Kakteenkunde, 85, sub tab., 1939

Thelocactus viereckii v. major (Glass & R.A. Foster) H. Bravo Hollis, Cact. Suc. Mex., 25 (3): 65: 1980

Thelocactus wagnerianus A. Berger, Kakteen, 256, 346., 1929

Thelocactus ysabelae Schlange, Cact. & Succ. Journ. Amer. 5. 551., 1934

Thelocactus ysabelae v. brevispinus Schlange, Cact. Succ. J. (Los Angeles) 5: 551., 1934