Discocactus placentiformis

Discocactus placentiformis (Lehm.) K.Schum. in Engler & Prantl, Nat. Pflanzenfam. 3(6a): 190. 1894 sec. Zappi & Taylor 2020

≡Cactus placentiformis Lehm. in Del. Sem. Hort. Hamburg. 1826 syn. sec. ???
≡Melocactus placentiformis (Lehm.) DC., Prodr. 3: 460. 1828 syn. sec. ???
≡Echinocactus placentiformis (Lehm.) K.Schum. in Martius, Fl. Bras. 4(2): 246. 1890 syn. sec. ???

=Melocactus besleri Link & Otto in Verh. Vereins Beförd. Gartenbaues Königl. Preuss. Staaten 3: 420. 1827 syn. sec. Kew WCVP (2019)

=Discocactus insignis Pfeiff. in Allg. Gartenzeitung 5: 241. 1837 syn. sec. Taylor & Zappi 2004

=Discocactus lehmannii Pfeiff. in Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 19(1): 120. 1839 syn. sec. Britton & Rose 1922

=Discocactus linkii Pfeiff. in Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 19(1): 120. 1839 syn. sec. Britton & Rose 1922

=Discocactus alteolens Lem. ex A.Dietr. in Allg. Gartenzeitung 14: 202. 1846 syn. sec. Taylor & Zappi 2004
≡Discocactus placentiformis var. alteolens (Lem. ex A.Dietr.) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 105. 1993 syn. sec. Taylor & Zappi 2004
≡Discocactus placentiformis subsp. alteolens (Lem. ex A.Dietr.) P.J.Braun & Esteves in Kakteen And. Sukk. 46: 64. 1995 syn. sec. Taylor & Zappi 2004
≡Echinocactus alteolens Lem., Hortus Van Houtteanus 1(2): 23. 1846 syn. sec. Kew WCVP (2019)
≡Echinocactus alteolens (Lem. ex A.Dietr.) K.Schum., Fl. Bras. 4(2): 246. 1890 syn. sec. Kew WCVP (2019)
≡Cactus alteolens (Lem. ex A.Dietr.) Kuntze in Deutsche Bot. Monatsschr. 21: 173. 1903 syn. sec. Taylor & Zappi 2004

=Echinocactus tricornis Monv. ex A.Dietr. in Allg. Gartenzeitung 14: 203. 1846 syn. sec. Kew WCVP (2019)
≡Discocactus tricornis Monv. ex Pfeiff. & Otto, Abbild. Beschr. Cact. 2: t. 28. 1850 syn. sec. Taylor & Zappi 2004

=Discocactus alteolens K.Schum. in Engler & Prantl, Nat. Pflanzenfam. 3(6a): 190. 1894 syn. sec. Kew WCVP (2019)

=Discocactus besleri F.A.C.Weber, Dict. Hort. 1: 450. 1896 syn. sec. Britton & Rose 1922

=Discocactus latispinus Buining & Brederoo, Discocactus: 95. 1976 syn. sec. Taylor & Zappi 2004

=Discocactus pugionacanthus Buining & Brederoo, Discocactus: 61. 1976 syn. sec. Taylor & Zappi 2004
≡Discocactus placentiformis var. pugionacanthus (Buining & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 105. 1993 syn. sec. Taylor & Zappi 2004
≡Discocactus placentiformis subsp. pugionacanthus (Buining & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 46: 64. 1995 syn. sec. Taylor & Zappi 2004

=Discocactus pulvinicapitatus Buining & Brederoo, Discocactus: 100. 1976 syn. sec. Taylor & Zappi 2004
≡Discocactus latispinus subsp. pulvinicapitatus (Buining & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 105. 1993 syn. sec. Taylor & Zappi 2004

=Discocactus crystallophilus Diers & Esteves in Kakteen And. Sukk. 32: 261. 1981 syn. sec. Taylor & Zappi 2004

=Discocactus pseudolatispinus Diers & Esteves in Kakteen And. Sukk. 38: 247. 1987 syn. sec. Taylor & Zappi 2004
≡Discocactus latispinus subsp. pseudolatispinus (Diers & Esteves) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 105. 1993 syn. sec. Taylor & Zappi 2004

=Discocactus placentiformis subsp. multicolorispinus P.J.Braun & Esteves in Kakteen And. Sukk. 59: 212. 2008 syn. sec. Taylor & Zappi 2004

–Discocactus multicolorispinus P.J.Braun & Brederoo in Kakteen And. Sukk. 32: 59. 1981, nom. inval., syn. sec. Taylor & Zappi 20041,2
–Discocactus placentiformis subsp. multicolorispinus (P.J.Braun & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 44(5): 105. 1993, nom. inval., syn. sec. Taylor & Zappi 20043,2

1. no details of type specimen indicated, 2. IPNI 2000+: International Plant Names Index. – The Royal Botanic Gardens, Kew, Harvard University Herbaria & Libraries and Australian National Botanic Gardens – http://www.ipni.org: 31 aug 2020, 3. basionym not validly published

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