Cactaceae
Melocactus Link et Otto
M. depressus Hook., Bot. Mag. 65: tab. 3691. 1838. [Fl. bras. 4(2): 235. 1890] [Text] . – Typus (Lit.): Brasilia, Pernambuco, Gardner s.n.; Lectotype {N.P. Taylor, Bradleya 9: 54. 1991}: Hooker, Bot. Mag. 65: tab. 3691. 1838. [ Cactus depressus (Hook.) borg 1937, Melocactus melocactoides forma depressus (Hook.) Rizzini 1982, Melocactus melcactoides var. depressus (Hook:) Rizzini 1982]
M. goniodacanthus Lem., Cact. aliq. nov.: 11. 1838. [Fl. bras. 4(2): 235. 1890] [Text] . – Typus (Lit.):
M. oreas Miq., Nov. Act. Nat. Cur. 19, Suppl. 1: 192. [Fl. bras. 4(2): 236. 1890] [Text] . – Typus (Lit.): Brazil, "habitat circa Bahiam" (Salvador); – Neotype {N.P. Taylor, Bradleya 9: 24. 1991}: Brazil, Bahias, Mun. Santa Teresinha, 7 km N of Milagres beside Rod. BR 116, 27.6.1989, Zappi 181a (K)
M. pentacentrus Lem., Cact. gen. sp. nov.: 108. 1839. [Fl. bras. 4(2): 236. 1890] [Text] . – Typus (Lit.): Brasilia, Bahia, cult. (not existant)
M. violaceus Pfeiff., Allg. Gartenzeitung 3: 313. 1835. [Fl. bras. 4(2): 234, tab. 48. 1890] [Text, Plate] . – Typus (Lit.): Brasilia, cult. Schelhase (B+); – Neotype {N.P. Taylor, Bradleya 9: 54. 1991}: Brazil, Rio de Janeiro, D. Sucre 9186 (RB-192529)