Ferocactus Britton & Rose, Cactaceae. Jahrbucher der Deutschen Kakteen-Gesellschaft (Berlin) 3: 123-124, 1922

Ferocactus acanthodes (Lemaire) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 129-131, pl. 15, f. 1, 2; f. 134-137, 1922

Ferocactus acanthodes v. acanthodes

Ferocactus acanthodes v. eastwoodiae L.D. Benson, The cacti of Arizona 23, 166-167, 169, 1969

Ferocactus acanthodes v. hertrichii  

Ferocactus acanthodes v. johnstonianus (Britton & Rose) G. Unger, Die grossen Kugelkakteen Nordamerikas 132, 1992

Ferocactus acanthodes v. lecontei (Engelmann) G.E. Lindsay, Cact. Succ. J. (Los Angeles) 27: 169., 1955

Ferocactus acanthodes v. rostii (Britton & Rose) Marshall in Marshall & T. M. Bock, Cactaceae (Berlin) 148., 1941

Ferocactus acanthodes v. tortulispinus  

Ferocactus acanthodes v. tortulospinus (H.E. Gates) G.E. Lindsay, Cactus & Succ. Jour. 27: 168, 1955

Ferocactus alamosanus (Britton & Rose) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 137, f. 145, 1922

Ferocactus alamosanus ssp. alamosanus

Ferocactus alamosanus ssp. reppenhagenii (G. Unger) N.P. Taylor, Cactaceae Consensus Initiatives 6: 15, 1998

Ferocactus alamosanus v. platygonus G. E. Lindsay, CasJ 14; 139-134, 1942

Ferocactus arizonicus Orcutt, Cactography, 6, 1926

Ferocactus bicolor (Galeotti ex Pfeiffer) N.P. Taylor, Cactus and Succulent Journal of Great Britain 41: 30, 1979

Ferocactus bicolor v. bolaensis (Runge) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (2): 30, 1979

Ferocactus bicolor v. flavidispinus (Backeberg) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (2): 30, 1979

Ferocactus bicolor v. schwarzii (Backeberg) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (2): 30, 1979

Ferocactus californicus (Monville) Borg, Cacti, 235, 1937

Ferocactus chrysacanthus (Orcutt) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 127, 1922

Ferocactus chrysacanthus f. rubrispinus (L.M. Ford ex Orcutt) G. Unger, Die grossen Kugelkakteen Nordamerikas 210, 1992

Ferocactus chrysacanthus ssp. chrysacanthus  

Ferocactus chrysacanthus ssp. grandiflorus (G.E. Lindsay) N.P. Taylor, Cactaceae Consensus Initiatives 6: 15, 1998

Ferocactus coloratus H. E. Gates, Cact. & Succ. Journ. Amer. 4. 344., 1933

Ferocactus coptonogonus (Lemaire) N.P. Taylor, Cact. Succ. J. Gr. Brit., 42 (4): 108, 1980

Ferocactus corniferus  

Ferocactus corniger De Candolle 

Ferocactus coulteri v. rufispinus Y. Ito, The Cactaceae: 499, without type, 1981

Ferocactus covillei Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 132-133, f. 138, 139, 1922

Ferocactus crassihamatus (F.A.C. Weber) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 144, f. 151, 1922

Ferocactus crispatus (DC.) N.P. Taylor, Cact. Succ. J. Gr. Brit., 42 (4): 108, 1980

Ferocactus cylindraceus (Engelmann) Orcutt, Cactography 5, 1926

Ferocactus cylindraceus ssp. cylindraceus

Ferocactus cylindraceus ssp. lecontei (Engelmann) N.P. Taylor, Cactaceae Consensus Initiatives, 6: 16: 1998

Ferocactus cylindraceus ssp. tortulispinus (H.E. Gates) N.P. Taylor, Cactaceae Consensus Initiatives, 6: 16: 1998

Ferocactus cylindraceus v. chrysacanthus (Schelle) Y. Ito, The Cactaceae: 490, specific name not validly publ.: 1981

Ferocactus cylindraceus v. eastwoodiae (L.D. Benson) N.P. Taylor, Bradleya; Yearbook of the British Cactus and Succulent Society 2: 33, 1984

Ferocactus cylindraceus v. greenwoodiae (Glass) N.P. Taylor, Bradleya 2: 27., 1984

Ferocactus cylindraceus v. tortulospinus (Gates) H. Bravo Hollis, Cact. Suc. Mex., 25 (3): 65: 1980

Ferocactus diguetii (F.A.C. Weber) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 131-132, pl. 11, f. 2; pl. 12, f. 3, 1922

Ferocactus diguetii v. carmenensis G. E. Lindsay, Cact. Succ. J. (Los Angeles) 27: 167, fig. 156., 1955

Ferocactus diguetii v. diguetii  

Ferocactus eastwoodiae (L.D. Benson) L.D. Benson, Cacti U. S. & Canada 969, 1982

Ferocactus echidne (DC.) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 135, f. 144, 1922

Ferocactus echidne v. aureispina  

Ferocactus echidne v. victoriensis (Rose) G.E. Lindsay, Cactus and Succulent Journal [U. S. ] 27: 168, 1955

Ferocactus electracanthus  

Ferocactus emoryi (Engelmann) Orcutt, Cactac. Handb. Kak1eenk. 5. 2717, 1961

Ferocactus emoryi ssp. emoryi  

Ferocactus emoryi ssp. rectispinus (Engelmann) N.P. Taylor, Cactaceae Consensus Initiatives, 6: 16: 1998

Ferocactus falconeri Orcutt, Cactography, 6, 1926

Ferocactus flavovirens (Scheidweiler) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 138, 13, f. 1, 1922

Ferocactus fordii (Orcutt) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 126-127, f. 132, 1922

Ferocactus fordii v. fordii  

Ferocactus fordii v. grandiflorus G. E. Lindsay, Cact. Succ. J. (Los Angeles) 27: 164, fig. 154., 1955

Ferocactus gatesii G. E. Lindsay, Cact. & Succ. Journ. Amer. 27. 151., 1955

Ferocactus gen. Bisnaga Orcutt 

Ferocactus glaucescens (DC.) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 137, 1922

Ferocactus glaucescens v. nudum  

Ferocactus glaucus (K.Schum.) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus gracilis H. E. Gates, Cact. & Succ. Journ. Amer. 4. 323., 1933

Ferocactus gracilis ssp. coloratus (H.E. Gates) N.P. Taylor, Cactaceae Consensus Initiatives 6: 16, 1998

Ferocactus gracilis ssp. gatesii (G.E. Lindsay) N.P. Taylor, Cactaceae Consensus Initiatives, 6: 16: 1998

Ferocactus gracilis ssp. gracilis  

Ferocactus grandiflorus hyb. (G.E. Lindsay) G. Unger, Die grossen Kugelkakteen Nordamerikas 242, 1992

Ferocactus guirocobensis Schwarz ex Backeberg, Die Cactaceae, V; 2743, 1961

Ferocactus haematacanthus (Monville) H. Bravo Hollis & F. M. Knuth, Kaktus-ABC, 352, 1935

Ferocactus hamatacanthus (Muehlenpf.) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 144-146, pl. 16, f. 1; f. 152, 1922

Ferocactus hamatacanthus ssp. hamatacanthus

Ferocactus hamatacanthus ssp. sinuatus (A. Dietrich) N.P. Taylor, Cactaceae Consensus Initiatives, 5: 13: 1969

Ferocactus hamatacanthus v. crassispinus (Engelm.) L. Benson, Cact. Succ. J. (U. S. A.), 46 (2): 80, 1974

Ferocactus hastifer (Werdermann & Boedeker) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus herrerae Ortega, Mex. For. 5. 53; Ortega in Bol. Pro-Cult. Reg. S. C. L. Nos. 14, 15 (Fam. Cact. [25]) (1930). 1927

Ferocactus hertrichii Weing 

Ferocactus heterochromus (A. Weber) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus histrix (DC) G. Lindsay, Cact. & Succ. Journ. Amer. 27. 171, 1828

Ferocactus horridus Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 128, 1922

Ferocactus johnsonii (Parry) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 141, f. 149, 1922

Ferocactus johnstonianus Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 287, 1923

Ferocactus latispinus (Haworth) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 143-144, pl. 16, f. 3, 1922

Ferocactus latispinus ssp. spiralis (Karwinski ex Pfeiffer) N.P. Taylor, Cactaceae Consensus Initiatives, 5: 13: 1998

Ferocactus latispinus v. flavispinus (Haage) Backeberg & F. M. Knuth, Kaktus-ABC 352., 1935

Ferocactus latispinus v. greenwoodii (C. Glass) N.P. Taylor, Bradleya, 2: 27: 1984

Ferocactus latispinus v. latispinus (C. F. Forst.) Backeberg & F. M. Knuth, Kaktus-ABC 352., 1935

Ferocactus latispinus v. recurvus (Mill.) Lodé, Cact. Aventures, cf. Repert. Pl. Succ. (I. O. S.), 27: 29, without basionym ref; 46: 10 (1995 publ. 1996): 1995

Ferocactus lecontei (Engelmann) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 129, 1922

Ferocactus leucacanthus (Zuccarini) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus lindsayi H. Bravo Hollis, Cact. & Suc. Mexic. 11. 9., 1966

Ferocactus macrodiscus (Mart.) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 139-140, f. 147, 1922

Ferocactus macrodiscus ssp. macrodiscus

Ferocactus macrodiscus ssp. septentrionalis (Meyran) N.P. Taylor, Cactaceae Consensus Initiatives, 5: 13: 1998

Ferocactus macrodiscus v. decolor (Monville) Y. Ito, The Cactaceae: 497, without basionym ref.: 1981

Ferocactus macrodiscus v. multiflorus (Mey) Berg 

Ferocactus macrodiscus v. spiralis (Karwinski ex Pfeiffer) N.P. Taylor 

Ferocactus mathssonii (Berge ex K.Schum.) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 91, 1979

Ferocactus melocactiformis (De Candolle) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 138-139, f. 146, 1922

Ferocactus mesae-verdae (Boissev. & C.Davidson) N.P.Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus neohaematacanthus Y. Ito, The Cactaceae: 499, nom. nov., without repl. syn. ref.: 1981

Ferocactus nobilis (L.) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 141-143, f. 150, 1922

Ferocactus orcuttii (Engelmann ex Orcutt) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 134, 1922

Ferocactus parviflorus (Clover & Jotter) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus peninsulae (F.A.C. Weber) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 133, f. 140, 1922

Ferocactus peninsulae v. coloratus (H.E. Gates) G. Unger, Die grossen Kugelkakteen Nordamerikas 202, 2992

Ferocactus peninsulae v. gracilis (H.E. Gates) G. Unger, Die grossen Kugelkakteen Nordamerikas 193, 1992

Ferocactus peninsulae v. peninsulae  

Ferocactus peninsulae v. santa-maria (Britton & Rose) N.P. Taylor, Bradleya, 2: 30: 1984

Ferocactus peninsulae v. townsendianus (Britton & Rose) N.P. Taylor, Bradleya, 2: 28: 1984

Ferocactus peninsulae v. viscainensis (H.E. Gates) G.E. Lindsay, Cactus & Succ. Jour. 27: 169, 1955

Ferocactus pfeiffieri (Zuccarini) Britton & Rose, Cactac. Handb. Kak1eenk. 5. 2742, in obs., 1823

Ferocactus phoeniceus Orcutt, Cactography, 6, 1926

Ferocactus phyllacanthus (Dietrich & Otto) N.P. Taylor, Cact. Succ. J. Gr. Brit., 42 (4): 108, 1980

Ferocactus piliferus (Lemaire ex Ehrenberg) G. Unger, Kakteen und Andere Sukkulenten 37 (2): 45, 1986

Ferocactus piliferus f. flavispinus (hort. ex Schelle) G. Unger, Kakteen und Andere Sukkulenten 37 (2): 45, 1986

Ferocactus piliferus v. stainesii (Salm-Dyck) G. Unger, Kakteen und Andere Sukkulenten 37 (2): 45, 1986

Ferocactus pilosus (Galeotti ex Salm-Dyck) Werdermann, Fedde, Repert. Sonder-Beih. C. t. 72, 1933

Ferocactus platygonus (Lindsay) Lindsay ex Backeberg, Die Cactaceae, V; 2741, 1961

Ferocactus polyancistrus (Engelmann & J. M. Bigelow) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus pottsii (Salm-Dyck) Backeberg, Cactac. Handb. Kak1eenk. 5. 2738, 1961

Ferocactus pottsii v. alamosanus (Britton & Rose) G. Unger, Kakt. And. Sukk., 22 (10): 187, 1971

Ferocactus pringlei (J.M. Coulter) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 125-126, pl. 11, f. 1; f. 129, 130, 131, 1922

Ferocactus pubispinus (Engelmann) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus rafaelensis (J.A. Purpus) Borg, Cacti, 236, 1937

Ferocactus rectispinus (Engelmann) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 134, pl. 14, 2; f. 142, 1922

Ferocactus recurvus (Mill.) Borg, Die grossen Kugelkakteen Nordamerikas: 299: 1992

Ferocactus recurvus f. flavispinus (Haage ex C.F. Foerst.) G. Unger, Die grossen Kugelkakteen Nordamerikas 316, 1992

Ferocactus recurvus f. spiralis (Karwinski ex Pfeiffer) G. Unger, Die grossen Kugelkakteen Nordamerikas 294, 1992

Ferocactus recurvus v. greenwoodii (C. Glass) G. Unger, Die grossen Kugelkakteen Nordamerikas 229, 1992

Ferocactus recurvus v. latispinus (Haworth) G. Unger, Die grossen Kugelkakteen Nordamerikas 302, 1992

Ferocactus reppenhagenii G. Unger, Kakt. And. Sukk., 25 (3): 50., 1974

Ferocactus rhodanthus Schwarz 

Ferocactus robustus (Link & Otto) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 1135-136, f. 141, 143, 1922

Ferocactus rostii Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 146-147, f. 153b, 1922

Ferocactus santa-maria Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 131, 1922

Ferocactus scheeri (Salm-Dyck) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus schwarzii G. E. Lindsay, Cact. & Succ. Journ. Amer. 27. 70., 1955

Ferocactus sect. Bisnaga (Orcutt) N.P. Taylor & J.Y. Clark, Bradleya; Yearbook of the British Cactus and Succulent Society 1: 6, 1983

Ferocactus sect. Ferocactus

Ferocactus sect. Glaucescenti G. Unger, Die grossen Kugelkakteen Nordamerikas 89, 1992

Ferocactus sect. Pottsia G. Unger, Die grossen Kugelkakteen Nordamerikas 88, 1992

Ferocactus sect. Sclerocactus (B. & R.) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus setispinus (Engelmann) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 128, 1969

Ferocactus sinuatus  

Ferocactus sinuatus v. papyracanthus

Ferocactus spinosior (Engelmann) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus stainesii (Hooker) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 124-125, f. 128, 1922

Ferocactus stainesii v. haematacanthus (Salm-Dyck) Backeberg, Cactaceae (Backeberg) 5: 2700., 1961

Ferocactus stainesii v. pilosus (Gal) Backeberg, Cactaceae (Backeberg) 5: 2702., 1961

Ferocactus stainesii v. pringlei (Coulter) Backeberg, Cactaceae (Backeberg) 5: 2701., 1961

Ferocactus subg. Ancistrocactus (K.Schum.) N.P.Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus subg. Bisnaga (Orcutt) G. Unger, Die grossen Kugelkakteen Nordamerikas 88, 1992

Ferocactus subg. Ferocactus  

Ferocactus subg. Hamatacanthus H. Bravo Hollis, Cact. Suc. Mex., 21 (3): 66., 1976

Ferocactus subg. Stenocactus (K. Schumann) N.P. Taylor, Cact. Succ. J. Gr. Brit., 42 (4): 108, 1980

Ferocactus tiburonensis (Lindsay) Backeberg, Cactac. Handb. Kak1eenk. 5. 2719, 1961

Ferocactus tobuschii (W.T. Marshall) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus tortulospinus H. E. Gates, Cact. & Succ. Journ. Amer. 4. 343., 1933

Ferocactus townsendianus Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 127, f. 133; pl. 12, f. 1, 1922

Ferocactus townsendianus v. santa-maria (Britton & Rose) G.E. Lindsay, Cactus & Succ. Jour. 27: 170, 1955

Ferocactus townsendianus v. townsendianus  

Ferocactus uncinatus (Galeotti) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 146, f. 153, 153a, 1922

Ferocactus uncinatus v. wrightii (Engelmann) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (2): 31, 1979

Ferocactus vaupelianus (Werdermann) N.P. Taylor, Cact. Succ. J. Gr. Brit., 42 (4): 108, 1980

Ferocactus victoriensis (Rose) Backeberg, Die Cactaceae 5: 1961

Ferocactus viridescens (Torr. & A. Gray) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 140-141, pl. 14, f. 1; f. 148, 1922

Ferocactus viridescens v. littoralis G. E. Lindsay, Cact. Succ. J. (Los Angeles) 36: 8, figs., 1964

Ferocactus viridescens v. orcuttii (Engelmann ex Orcutt) G. Unger, Die grossen Kugelkakteen Nordamerikas 105, 1992

Ferocactus viscainensis H. E. Gates, Cact. & Succ. Journ. Amer. 4. 324., 1933

Ferocactus whipplei (Engelmann & J. M. Bigelow) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979

Ferocactus wislizeni (Engelmann) Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 3: 127-128, pl. 12, f. 2; f. 131a, 1922

Ferocactus wislizeni v. albispinus (Toumey) Y. Ito, Cacti (Borg), 105. 1952, 1952

Ferocactus wislizeni v. cristata

Ferocactus wislizeni v. herrerae (J. G. Ortega) N.P. Taylor, Bradleya, 2: 34: 1984

Ferocactus wislizeni v. phoeniceus (R. E. Kunze) Y. Ito, Cacti (Borg), 105. 1952, 1952

Ferocactus wislizeni v. tiburonensis G. E. Lindsay, Cact. Succ. J. (Los Angeles) 27: 166, fig. 155., 1955

Ferocactus wislizeni v. wislizeni

Ferocactus wislizenii v. flalconeri (Orcutt) Y. Ito, The Cactaceae: 495, without basionym ref.: 1981

Ferocactus wislizenii v. rosea Y. Ito, The Cactaceae: 495, without type, 1981

Ferocactus wrightiae (L. Benson) N.P. Taylor, Cact. Succ. J. Gr. Brit., 41 (4): 90, 1979