Pyrrhocactus (A. Berger) Backeberg & F.M. Knuth, Kaktus-ABC 262, 1935

Pyrrhocactus aconcaguensis F. Ritter, Succulenta, 1960, 108., 1960

Pyrrhocactus aconcaguensis v. orientalis F. Ritter, Succulenta (Netherlands): 109. 1960, 1960

Pyrrhocactus andicola (F. Ritter) F F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus andicola v. descendens (F. Ritter) F. Ritter, Succulenta (Netherlands): 131. 1959, 1959

Pyrrhocactus andicola v. mollensis (F. Ritter) F. Ritter, Succulenta (Netherlands): 131. 1959, 1959

Pyrrhocactus andicola v. robustus (F. Ritter) F. Ritter, Succulenta (Netherlands): 131. 1959, 1959

Pyrrhocactus andreaeanus (Backeberg) F. Ritter 

Pyrrhocactus aricensis F. Ritter, Taxon, 12. 32., 1963

Pyrrhocactus armatus F. Ritter, Succulenta, 1960, 49., 1960

Pyrrhocactus aspillagae (Sohrens) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus aspillagai

Pyrrhocactus atrospinosus Backeberg, Descr. Cact. Nov. 3. 13., 1963

Pyrrhocactus atroviridis F. Ritter, Succulenta, 1960, 89., 1960

Pyrrhocactus bulbocalyx (Werdermann) Backeberg, Cactac. Handb. Kakteenk. 3., 1959

Pyrrhocactus bulbocalyx f. catamarcensis 

Pyrrhocactus bulbocalyx f. sanjuanensis 

Pyrrhocactus calderanus F. Ritter, Succulenta, 1961, 13., 1961

Pyrrhocactus carrizalensis F. Ritter, Taxon, 12. 33., 1963

Pyrrhocactus catamarcensis (F. A. C. Weber) Backeberg 

Pyrrhocactus centeterius A. Berger, Kakteen, 216, 345., 1929

Pyrrhocactus chaniarensis F. Ritter, Kakteen in Südamerika, 3: 926, 1980

Pyrrhocactus chilensis (Hildmann) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus chilensis v. albidiflorus F. Ritter, Kakteen in Südamerika, 3: 927, 1980

Pyrrhocactus choapensis F. Ritter, Succulenta, 1960, 133., 1960

Pyrrhocactus chorosensis F. Ritter, Succulenta, 121., 1960

Pyrrhocactus coliguayensis F. Ritter, Kakteen in Südamerika, 3: 929, 1980

Pyrrhocactus confinis F. Ritter, Succulenta, 1961, 4., 1961

Pyrrhocactus crispus F. Ritter, Succulenta, 1959, 137., 1959

Pyrrhocactus curvispinus (Bertero ex Colla) A. Berger, Backeb. & F. M. Knuth, Kaktus-ABC, 262, 1935

Pyrrhocactus curvispinus v. combarbalensis 

Pyrrhocactus curvispinus v. pectorensis 

Pyrrhocactus deherdtianus (Backeberg) F. Kattermann, Cact. Succ. J. (U. S. A.), 55 (3): 123: 1983

Pyrrhocactus dimorphus F. Ritter, Suculenta 1, 3, 1962

Pyrrhocactus dubius Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 263, 415., 1935

Pyrrhocactus echinus F. Ritter, Taxon, 12. 33., 1963

Pyrrhocactus echinus v. minor F. Ritter, Taxon 12: 33., 1963

Pyrrhocactus engleri (F. Ritter) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus eriosyzoides (F. Ritter) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus eriosyzoides v. domeykoensis F. Ritter, Kakteen in Südamerika, 3: 938, 1980

Pyrrhocactus floccosus F. Ritter, Taxon, 12. 32., 1963

Pyrrhocactus floccosus v. minor (F. Ritter) F. Ritter, Kakteen in Südamerika, 3: 939: 1980

Pyrrhocactus floribundus (Backeberg) F. Ritter, Kakteen in Südamerika, 3: 940, without full basionym ref.: 1980

Pyrrhocactus froehlichianus (K. Schumann) Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 262, 1935

Pyrrhocactus fusciflorus 

Pyrrhocactus fuscus (Muehlenpf.) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus garaventae (F. Ritter) F. Ritter 

Pyrrhocactus garaventai

Pyrrhocactus glaucescens F. Ritter, Taxon, 12. 33., 1963

Pyrrhocactus gracilis F. Ritter, Succulenta, 1961, 129., 1961

Pyrrhocactus grandiflorus F. Ritter, Succulenta, 1960, 41., 1960

Pyrrhocactus griseus Backeberg, Cactaceae, 3907, 1962, 1962

Pyrrhocactus heinrichianus (Backeberg) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus horridus (Colla) Backeberg 

Pyrrhocactus horridus v. aconcaguensis (F. Ritter) F. Ritter, Kakteen in Südamerika, 3: 948: 1980

Pyrrhocactus horridus v. mutabilis F. Ritter, Kakteen in Südamerika, 3: 946, 1980

Pyrrhocactus horridus v. orientalis (F. Ritter) F. Ritter, Kakteen in Südamerika, 3: 949: 1980

Pyrrhocactus horridus v. robustus (F. Ritter) F. Ritter, Kakteen in Südamerika, 3: 947: 1980

Pyrrhocactus huascensis F. Ritter, Succulenta (Netherlands): 57. 1962, 1962

Pyrrhocactus intermedius F. Ritter, Taxon, 12. 32., 1963

Pyrrhocactus iquiquensis F. Ritter, Taxon, 12. 32, 1963

Pyrrhocactus jussieui (Monville) F. Ritter, Kakteen in Südamerika, 3: 951: 1980

Pyrrhocactus jussieui v. australis F. Ritter, Kakteen in Südamerika, 3: 952, 1980

Pyrrhocactus jussieui v. spinosior F. Ritter, Kakteen in Südamerika, 3: 952, 1980

Pyrrhocactus katermannii R. Kiesling, Monogr. Syst. Bot. Missouri Bot. Gard. 74 (2): 1246., 1999

Pyrrhocactus kesselringianus (Dolz) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus krausii F. Ritter, Kakteen in Südamerika, 3: 953, 1980

Pyrrhocactus kunzei (Foerst.) Y. Ito, Cacti, 262, 1937

Pyrrhocactus limariensis F. Ritter, Kakteen in Südamerika, 3: 956, 1980

Pyrrhocactus lissocarpus F. Ritter, Succulenta, 1960, 17., 1960

Pyrrhocactus lissocarpus v. gracilis F. Ritter, Succulenta (Netherlands): 17. 1960, 1960

Pyrrhocactus mammillarioides (Hook.) Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 263, 1935

Pyrrhocactus marayesensis (Backeberg) J.G. Lambert, Cactus d'Argentine, ed. 2: 265: 1998

Pyrrhocactus marksianus F. Ritter, Succulenta, 1960, 2., 1960

Pyrrhocactus marksianus v. tunensis F. Ritter, Succulenta (Netherlands): 2. 1960, 1960

Pyrrhocactus megliolii W. Rausch, Kakteen Sukk. 25 (10): 220, fig., 1975

Pyrrhocactus melanacanthus Backeberg, Descr. Cact. Nov. 3. 13., 1963

Pyrrhocactus neohankeanus F. Ritter, Kakteen in Südamerika, 3: 959, 1980

Pyrrhocactus neohankeanus f. woutersianus (Backeberg) F. Ritter, Kakteen in Südamerika, 3: 960, without basionym date: 1980

Pyrrhocactus neohankeanus v. densispinus F. Ritter, Kakteen in Südamerika, 3: 960, 1980

Pyrrhocactus neohankeanus v. elongatus F. Ritter, Kakteen in Südamerika, 3: 960, 1980

Pyrrhocactus neohankeanus v. flaviflorus F. Ritter, Kakteen in Südamerika, 3: 960, 1980

Pyrrhocactus nigricans (A. Linke) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus occultus (K. Schumann) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus odoriflorus F. Ritter, Succulenta, 1960, 116., 1960

Pyrrhocactus pachacoensis W. Rausch, Kakt. And. Sukk., 26 (4): 73., 1975

Pyrrhocactus pamaensis F. Ritter, Kakteen in Südamerika, 3: 962, 1980

Pyrrhocactus paucicostatus (F. Ritter) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus paucicostatus v. viridis (F. Ritter) F. Ritter, Succulenta (Netherlands): 131. 1959, 1959

Pyrrhocactus pilispinus F. Ritter, Succulenta, 1962, 42., 1962

Pyrrhocactus platyacanthus F. Ritter, Kakteen in Südamerika, 2: 420, 1980

Pyrrhocactus pulchellus F. Ritter, Kakteen in Südamerika, 3: 965, 1980

Pyrrhocactus pygmaeus F. Ritter, Taxon, 12. 32., 1963

Pyrrhocactus reconditus F. Ritter, Succulenta, 1962, 27., 1962

Pyrrhocactus residuus F. Ritter & Buining, Taxon, 12. 33., 1963

Pyrrhocactus robustus F. Ritter, Succulenta, 1960, 65., 1960

Pyrrhocactus robustus v. vegasanus F. Ritter, Succulenta (Netherlands): 65. 1960, 1960

Pyrrhocactus rupicola F. Ritter, Taxon, 12. 32., 1963

Pyrrhocactus sanjuanensis (Spegazzini) Backeberg, Cactaceae: Jahrb. Deutsch. Kakt. -Ges., Teil 2 (Okt.) 54, in obs., 1939

Pyrrhocactus saxifragus F. Ritter, Kakteen in Südamerika, 3: 970, 1980

Pyrrhocactus scoparius F. Ritter, Succulenta, 1962, 51., 1962

Pyrrhocactus setiflorus Backeberg, Descr. Cact. Nov. 3: 13. 163,

Pyrrhocactus setosiflorus F. Ritter, Succulenta, 1962, 70., 1962

Pyrrhocactus setosiflorus v. intermedius F. Ritter, Succulenta (Netherlands): 70. 1962, 1962

Pyrrhocactus simulans F. Ritter, Succulenta, 1961, 35., 1961

Pyrrhocactus strausianus (K. Schumann) Berger 

Pyrrhocactus strausianus v. pachacoensis  

Pyrrhocactus strausianus v. sanjuanensis (Spegazzini) J. Lambert, Succulenta, 74 (1): 36: 1995

Pyrrhocactus subaianus Backeberg, Cactac. Handb. Kakteenk. 3., 1959

Pyrrhocactus taltalensis (Hutchison) F. Ritter, Succulenta, 1959, 131, 1959

Pyrrhocactus tenuis F. Ritter, Kakteen in Südamerika, 3: 976, 1980

Pyrrhocactus totoralensis F. Ritter, Succulenta, 131., 1961

Pyrrhocactus transiens F. Ritter, Kakteen in Südamerika, 3: 977, 1980

Pyrrhocactus transitensis F. Ritter, Taxon, 12. 33., 1963

Pyrrhocactus trapichensis F. Ritter, Kakteen in Südamerika, 3: 979, 1980

Pyrrhocactus truncatipetalus F. Ritter, Kakteen in Südamerika, 3: 980, 1980

Pyrrhocactus tuberisulcatus (Jac.) Berg., Kakteen, 215, 345., 1929

Pyrrhocactus umadeave (Wierderm.) Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 264, 1935

Pyrrhocactus umadeave v. marayesensis Backeberg, Descr. Cact. Nov. 3: 13., 1963

Pyrrhocactus vallenarensis F. Ritter, Succulenta, 157., 1959

Pyrrhocactus vegasanus  

Pyrrhocactus vertongenii J.G. Lamb., Succulenta, 74 (6): 271, 1995

Pyrrhocactus vexatus F. Ritter, Kakteen in Südamerika, 3: 981, 1980

Pyrrhocactus villicumensis W. Rausch, Kakt. And. Sukk., 25 (12): 268., 1974

Pyrrhocactus vollianus Backeberg, Descr. Cact. Nov. 31., 1957

Pyrrhocactus vollianus v. breviaristatus Backeberg, Descr. Cact. Nov. 31., 1956

Pyrrhocactus wagenknechtii F. Ritter, Succulenta, 1960, 82., 1960