Cactus lamarkii Colla species synonym

Melocactus bohiensis Britton species doubtful

Cactus macracanthos Salm-Dyck species synonym

Melocactus ferox Pfeiff. ex C.F.Först. species synonym

Melocactus broadwayi (Britton & Rose) Backeb. species synonym

Cactus miquelii (Lehm.) Borg species synonym

Melocactus parvispinus DC. species synonym

Melocactus oreas var. submunitis Rizzini variety synonym

Cactus smithii Alexander species synonym

Cactus negryi K.Schum., Britton & Rose species homotypic synonym

Cactus communis (W.T.Aiton) Steud. species synonym

Melocactus acunae León species synonym

Cactus intortus f. quentinianus Stehlé form synonym

Cactus zehntneri Britton & Rose species synonym

Cactus nobilis Lam. species synonym

Cactus zuccarinii (Miq.) Borg species synonym

Cactus microcephalus (Miq.) Borg species synonym

Melocactus trujillensis Rauh & Backeb. species synonym

Melocactus coronatus Cels ex C.F.Först. species synonym

Melocactus atrovirens C.F.Först. species doubtful

Cactus intortus Mill. species synonym

Cactus neryi (K.Schum.) Britton & Rose species synonym

Melocactus trujillensis var. schoenii Rauh & Backeb. variety synonym

Cactus coronatus Lam. species heterotypic synonym

Melocactus coronatus Cels species homotypic synonym

Melocactus hystrix J.Parm. species homotypic synonym

Melocactus monoclonos DC. species homotypic synonym

Cactus pyramidalis Salm-Dyck species synonym

Melocactus delessertianus Lem. species synonym

Cactus jansenianus (Backeb.) Borg species synonym

Melocactus smithii (Alexander) Buining species synonym

Melocactus hookeri Valck.Sur. species synonym

Cactus melocactus var. communis Aiton variety synonym

Melocactus zehntneri (Britton & Rose) Leutzelb. species doubtful

Melocactus cephalonoplus Lem. ex C.F.Först. species doubtful

Melocactus zehntneri (Britton & Rose) Luetzelb. species accepted

Melocactus sergipensis N.P.Taylor & Meiado species accepted

Melocactus excavatus J.Forbes species doubtful

Cactus coronatus Willd. species synonym

Melocactus macracanthos subsp. stramineus (Valck.Sur.) Guiggi subspecies synonym

Melocactus heimenii P.J.Braun & Gonç.Brito species accepted

Melocactus calderianus Eerkens species accepted

Melocactus harlowii subsp. evae (Z.Mészáros) Guiggi subspecies synonym

Melocactus curvispinus Hort.Berol. species homotypic synonym

Melocactus rufispinus f. paucispinus Valck.Sur. form synonym

Melocactus acunae subsp. flavispinus Z.Mészáros subspecies synonym

Melocactus harlowii subsp. borhidii (Z.Mészáros) Kunte subspecies synonym

Melocactus communis var. lanifer Pfeiff. variety synonym

Melocactus rufispinus f. pluricostatus-prurispinus Valck.Sur. form synonym

Melocactus acunae var. flavispinus Z.Mészáros variety synonym

Cactus macranthos Salm-Dyck species synonym

Melocactus zehntneri subsp. douradaensis (Hovens & Strecker) P.J.Braun & Heimen subspecies synonym

Melocactus azureus subsp. krainzianus (Buining & Brederoo) Guiggi subspecies synonym

Melocactus pachycephalus N.P.Taylor species synonym

Melocactus leopoldii De Smet ex T.Moore & Mast. species doubtful

Melocactus barbarana Antesb. species synonym

Melocactus eustachius f. vetustior Valck.Sur. form synonym

Melocactus harlowii subsp. acunae (León) Guiggi subspecies synonym

Melocactus lagunaensis (Z.Mészáros) D.Barrios & Majure species synonym

Melocactus disciformis Anonymus species synonym

Melocactus neoviridescens Guiggi species accepted

Melocactus melocactoides f. sanctaritii Rizzini form synonym

Melocactus pachyanthus Buining ex Brederoo species synonym

Melocactus zehntneri f. douradaensis (Hovens & Strecker) Guiggi form synonym

Melocactus griseoloviridis Buining ex Brederoo species synonym

Melocactus viridescens Guiggi species heterotypic synonym

Melocactus helvolilanthus Buining species homotypic synonym

Cactus melocactus Vell. species proparte synonym

Melocactus broadwayi (Britton & Rose) Houghton species synonym

Melocactus santiagoensis D.Barrios & Majure species accepted

Melocactus pygmaeus Hoxey, Gdaniec & Ackerman species accepted

Echinocactus parvispinus (Haw.) DC. species synonym

Echinocactus intortus var. purpureus DC. variety synonym

Echinocactus fischeri Pfeiff. species synonym

Echinocactus armatus Salm-Dyck species synonym

Echinocactus xanthacanthus Miq. species synonym

Echinocactus spina-christi Zucc. ex Pfeiff. species synonym

Echinocactus salmianus Link & Otto species synonym

Echinocactus rufispinus Bertol. species synonym

Melocactus acunai León, 1934 species accepted

Melocactus communis (Aiton) Link & Otto species synonym

Melocactus zehntneri (Britton & Rose) Backeb. species synonym

Melocactus violaceus Pfeiff. species accepted

Melocactus trujilloensis Rauh & Backeb. species synonym

Melocactus stramineus Valck.Sur. species accepted

Melocactus spatanginus Valck.Sur. species synonym

Echinocactus intortus (Mill.) DC. species synonym

Melocactus schatzlii H.Till & R.Gruber species accepted

Melocactus salmianus Link & Otto species synonym

Melocactus rufispinus Bertol. species synonym

Melocactus rotifer Valck.Sur. species synonym

Melocactus pyramidalis (Salm-Dyck) Link & Otto species synonym

Melocactus pruinosus Werderm. species accepted

Melocactus pinguis Valck.Sur. species synonym

Melocactus peruvianus Vaupel species accepted

Melocactus pachyacanthus Buining & Brederoo species accepted

Melocactus oreas Miq. species accepted

Melocactus obliquus Valck.Sur. species synonym

Melocactus microcephalus Miq. species synonym

Melocactus melacactoides species accepted

Melocactus matanzanus León species accepted

Melocactus macrodiscus Werderm. species synonym

Melocactus macrocanthus Miq. species synonym

Melocactus levitestatus Buining & Brederoo species accepted

Melocactus lemairei (Monv. ex Lem.) Miq. species accepted

Melocactus intermedius Valck.Sur. species synonym

Melocactus inconcinnus Buining & Brederoo species accepted

Melocactus harlowii (Britton & Rose) Vaupel species accepted

Melocactus gilvispinus Valck.Sur. species synonym

Melocactus ernestii Vaupel species accepted

Melocactus deinacanthus Buining & Brederoo species accepted

Melocactus curvispinus Hort.Berol. ex Pfeiff. species accepted

Melocactus conoideus Buining & Brederoo species accepted

Melocactus concinnus Buining & Brederoo species synonym

Melocactus canescens F.Ritter species synonym

Melocactus bellavistensis Rauh & Backeb. species accepted

Melocactus bahiensis (Britton & Rose) Luetzelb. species accepted

Melocactus bahiensis f. bahiensis form synonym

Melocactus azureus Buining & Brederoo species accepted

Melocactus azureus subsp. azureus subspecies synonym

Melocactus andinus R.Gruber ex N.P.Taylor species accepted

Melocactus albispinus Valck.Sur. species synonym

Melocactus aciculosus Valck.Sur. species synonym

Cactus harlowii Britton & Rose species synonym

Melocactus griseoloviridis Buining species homotypic synonym

Melocactus lanssersianus P.J.Braun species synonym

Cactus macracanthus Salm-Dyck species synonym

Melocactus ×albicephalus Buining & Brederoo species accepted

Melocactus communis var. havannensis Pfeiff. variety synonym

Melocactus zuccarinii Miq. species synonym

Melocactus zehntneri var. viridis F.Ritter variety synonym

Melocactus zehntneri subsp. robustispinus (Buining et al.) P.J.Braun subspecies synonym

Melocactus zehntneri f. douradaensis (Hovens & Strecker) Delanoy form synonym

Melocactus zehntneri var. curvicornis (Buining & Brederoo) P.J.Braun variety synonym

Melocactus zehntneri subsp. canescens (F.Ritter) P.J.Braun subspecies synonym

Melocactus zehntneri subsp. arcuatispinus (Brederoo & Eerkens) P.J.Braun & Esteves subspecies synonym

Melocactus zehntneri var. ananas Rizzini variety synonym

Melocactus xanthacanthus Miq. species synonym

Melocactus wendlandii Miq. species synonym

Melocactus warasii E.Pereira & Buenecker species synonym

Melocactus viridis Lawr. species doubtful

Melocactus unguispinus Backeb. species synonym

Melocactus uebelmannii P.J.Braun species synonym

Melocactus trujilloensis var. schoenii Rauh & Backeb. variety synonym

Melocactus trigonus Valck.Sur. species synonym

Melocactus trigonaster Valck.Sur. species synonym

Melocactus trichacanthus Valck.Sur. species synonym

Melocactus ×trachycephalus Valck.Sur. species accepted

Melocactus townsendianus Backeb. species synonym

Melocactus tenuissimus Valck.Sur. species synonym

Melocactus stramineus f. pluricostatus Valck.Sur. form synonym

Melocactus stellatus Valck.Sur. species synonym

Melocactus spatangus Pfeiff. species synonym

Melocactus spatanginus f. tenuispinus Valck.Sur. form synonym

Melocactus sordidus Valck.Sur. species synonym

Melocactus smithii (Alexander) Buining ex G.D.Rowley species accepted

Melocactus securituberculatus Buining & Brederoo species synonym

Melocactus schulzianus Buining & Brederoo species synonym

Melocactus schlumbergerianus Lem. species synonym

Melocactus diersianus Buining & Brederoo species synonym

Melocactus saxicola Diers & Esteves species synonym

Melocactus salvadorensis Werderm. species accepted

Melocactus diersianus f. rubrispinus (F.Ritter) P.J.Braun form synonym

Melocactus salmianus var. spectabilis Valck.Sur. variety synonym

Melocactus dilatatus Valck.Sur. species synonym

Melocactus salmianus var. contractus Valck.Sur. variety synonym

Melocactus salmianus var. adauctus Valck.Sur. variety synonym

Melocactus douradaensis Hovens, W.Strecker et al. species synonym

Melocactus eburneus Valck.Sur. species synonym

Melocactus rufispinus f. pluriareolatus Valck.Sur. form synonym

Melocactus rufispinus f. laticostatus Valck.Sur. form synonym

Melocactus rufispinus f. elongatus Valck.Sur. form synonym

Melocactus rufispinus f. curvispinus Valck.Sur. form synonym

Melocactus rufispinus f. crassispinus Valck.Sur. form synonym

Melocactus rufispinus f. aplanatus Valck.Sur. form synonym

Melocactus rudis Valck.Sur. species synonym

Melocactus rubrispinus F.Ritter species synonym

Melocactus rubens Pfeiff. species heterotypic synonym

Melocactus rubellus Valck.Sur. species synonym

Melocactus rotula var. validispinus Valck.Sur. variety synonym

Melocactus rotula var. angusticostatus Valck.Sur. variety synonym

Melocactus rotifer var. angustior Valck.Sur. variety synonym

Melocactus roraimensis P.J.Braun & Esteves species synonym

Melocactus robustispinus Buining & Brederoo species synonym

Melocactus reversus Valck.Sur. species synonym

Melocactus reticulatus Valck.Sur. species synonym

Melocactus rectiusculus Valck.Sur. species synonym

Melocactus radoczii Z.Mészáros species synonym

Melocactus pyramidalis var. compressus Valck.Sur. variety synonym

Melocactus pusillus Valck.Sur. species synonym

Melocactus pulvinosus Valck.Sur. species synonym

Melocactus pruinosus var. concinnus (Buining & Brederoo) P.J.Braun variety synonym

Melocactus portoricensis Valck.Sur. species synonym

Melocactus pinguis var. tenuissimus Valck.Sur. variety synonym

Melocactus pinguis var. planispinus Valck.Sur. variety synonym

Melocactus pinguis var. laticostatus Valck.Sur. variety synonym

Melocactus pinguis var. areolosus Valck.Sur. variety synonym

Melocactus peruvianus var. lurinensis Rauh & Backeb. variety synonym

Melocactus peruvianus var. canetensis Rauh & Backeb. variety synonym

Melocactus peruvianus var. amstutziae (Rauh & Backeb.) Rauh & Backeb. variety synonym

Melocactus perezassoi Areces species synonym

Melocactus pentacanthus Valck.Sur. species synonym

Melocactus pedernalensis M.M.Mejía & R.G.Garcia species accepted

Melocactus paucispinus Heimen & R.J.Paul species accepted

Melocactus patens Valck.Sur. species synonym

Melocactus parvispinus Valck.Sur. species synonym

Melocactus pachycentrus Valck.Sur. species synonym

Melocactus pachyanthus Buining species homotypic synonym

Melocactus pachyacanthus subsp. viridis N.P.Taylor subspecies synonym

Melocactus ovatus Valck.Sur. species synonym

Melocactus octogonus J.Forbes species doubtful

Melocactus obovatus Valck.Sur. species synonym

Melocactus obliquus f. quadrispina Valck.Sur. form synonym

Melocactus neryi K.Schum. species accepted

Melocactus negryi K.Schum. species synonym

Melocactus nagyi Z.Mészáros species synonym

Melocactus monvillianus Miq. species doubtful

Melocactus monoclonos DC. ex Steud. species doubtful

Melocactus miquelii Lehm. species synonym

Melocactus microcephalus var. olivascens Valck.Sur. variety synonym

Melocactus microcarpus Valck.Sur. species synonym

Melocactus meonacanthus Link & Otto species synonym

Melocactus melocactus (L.) H.Karst. species synonym

Melocactus mazelianus Ríha species accepted

Melocactus matanzanus subsp. actinacanthus (Areces) Guiggi subspecies synonym

Melocactus macracanthos (Salm-Dyck) Link & Otto species accepted

Melocactus macracanthoides Miq. species synonym

Melocactus lutescens Valck.Sur. species synonym

Melocactus linkii Valck.Sur. species synonym

Melocactus limis Valck.Sur. species synonym

Melocactus levitestatus f. securituberculatus (Buining & Brederoo) P.J.Braun & Esteves form synonym

Melocactus leucaster Hoffmanns. species synonym

Melocactus leucacanthus Valck.Sur. species synonym

Melocactus leopoldii De Smet species homotypic synonym

Melocactus lehmannii Miq. species synonym

Melocactus laui H.Antesb. species synonym

Melocactus lasyacanthus Sprenger species doubtful

Melocactus lanssensianus P.J.Braun species accepted

Melocactus lamarckii (Colla) G.Don species synonym

Melocactus krainzianus Buining & Brederoo species synonym

Melocactus jansenianus Backeb. species synonym

Melocactus inversus Valck.Sur. species synonym

Melocactus intortus subsp. broadwayi (Britton & Rose) Guiggi subspecies synonym

Melocactus intortus var. antonii (Britton) Backeb. variety synonym

Melocactus intermedius var. tenuispinus Valck.Sur. variety synonym

Melocactus intermedius var. rotundatus Valck.Sur. variety synonym

Melocactus intermedius var. laticostatus Valck.Sur. variety synonym

Melocactus inflatus Valck.Sur. species synonym

Melocactus incurvus Valck.Sur. species synonym

Melocactus inconcinnus var. brederooianus (Buining) F.Ritter variety synonym

Melocactus inconcinnus var. brederooanus (Buining) F.Ritter variety synonym

Melocactus inclinatus H.Antesb. species synonym

Melocactus hystrix J.Parm. ex Miq. species doubtful

Melocactus huallancensis Rauh & Backeb. species synonym

Melocactus huallancaensis Rauh & Backeb. species synonym

Melocactus ×horridus Werderm. species accepted

Melocactus hookerianus J.Forbes ex C.F.Först. species doubtful

Melocactus hookeri Lawr. species doubtful

Melocactus hexacanthus Valck.Sur. species synonym

Melocactus helvolilanthus Buining ex Brederoo species synonym

Melocactus helvolilanatus Buining & Brederoo species synonym

Melocactus havannensis (Pfeiff.) Miq. species synonym

Melocactus harlowii subsp. perezassoi (Areces) Guiggi subspecies synonym

Melocactus guaricensis Croizat species synonym

Melocactus grengelii J.Forbes species synonym

Melocactus grandispinus Valck.Sur. species synonym

Melocactus grandis Valck.Sur. species synonym

Melocactus gracilis Valck.Sur. species synonym

Melocactus glaucescens Buining & Brederoo species accepted

Melocactus glaucencens Buining & Brederoo species doubtful

Melocactus gilvispinus var. planispinus Valck.Sur. variety synonym

Melocactus giganteus Buining & Brederoo species synonym

Melocactus fortalezensis Rauh & Backeb. species synonym

Melocactus flexus Valck.Sur. species synonym

Melocactus flexilis Valck.Sur. species synonym

Melocactus flavispinus Valck.Sur. species synonym

Melocactus flammeus Valck.Sur. species synonym

Melocactus firmus Valck.Sur. species synonym

Melocactus ferus Valck.Sur. species synonym

Melocactus ferreophilus Buining & Brederoo species accepted

Melocactus ferox Valck.Sur. species synonym

Melocactus extensus Valck.Sur. species synonym

Melocactus excavatus G.Don species doubtful

Melocactus evertszianus Valck.Sur. species synonym

Melocactus evae Z.Mészáros species synonym

Melocactus eustachianus Valck.Sur. species synonym

Melocactus euryacanthus Valck.Sur. species synonym

Melocactus estevesii P.J.Braun species accepted

Melocactus elongatus Valck.Sur. species synonym

Melocactus eburneus f. plurispina Valck.Sur. form synonym

Melocactus dichroacanthus Miq. species synonym

Melocactus cylindricus Valck.Sur. species synonym

Melocactus curvicornis Buining & Brederoo species synonym

Melocactus croceus Valck.Sur. species synonym

Melocactus coronatus (Lam.) Backeb. species synonym

Melocactus cornutus Valck.Sur. species synonym

Melocactus cordatus Valck.Sur. species synonym

Melocactus contortus Valck.Sur. species synonym

Melocactus conoideus subsp. braunii (Esteves) Guiggi subspecies synonym

Melocactus concinnus subsp. axiniphorus (Buining & Brederoo) P.J.Braun & Esteves subspecies synonym

Melocactus communis var. viridis Pfeiff. variety synonym

Melocactus communis var. oblongus Link & Otto variety synonym

Melocactus communis var. grengelii Pfeiff. variety synonym

Melocactus citrispinus Antesb. species synonym

Melocactus caroli-linnaei N.P.Taylor species accepted

Melocactus capillaris Valck.Sur. species synonym

Melocactus canescens var. montealtoi F.Ritter variety synonym

Melocactus calderanus Eerkens species doubtful

Melocactus buysianus Valck.Sur. species synonym

Melocactus brongniartii Lem. species synonym

Melocactus brederooianus Buining species accepted

Melocactus brederooanus Buining species accepted

Melocactus braunii Esteves species accepted

Melocactus bradleyi Valck.Sur. species synonym

Melocactus ×bozsingianus Antesb. species synonym

Melocactus borhidii Z.Mészáros species synonym

Melocactus bargei Valck.Sur. species synonym

Melocactus barbarae H.Antesb. species synonym

Melocactus baarsianus Valck.Sur. species synonym

Melocactus baarscanus Suringar species doubtful

Melocactus azureus var. krainzianus (Buining & Brederoo) P.J.Braun variety synonym

Melocactus azureus subsp. ferreophilus (Buining & Brederoo) N.P.Taylor subspecies synonym

Melocactus axiniphorus Buining & Brederoo species synonym

Melocactus atrosanguineus Pfeiff. species synonym

Melocactus arcuatus Valck.Sur. species synonym

Melocactus arcuatispinus Brederoo & Eerkens species synonym

Melocactus approximatus Valck.Sur. species synonym

Melocactus antonii (Britton) F.M.Knuth species synonym

Melocactus angusticostatus Valck.Sur. species synonym

Melocactus amstutziae Rauh & Backeb. species synonym

Melocactus alex-bragai P.J.Braun & Esteves species accepted

Melocactus albispinus f. quadrispina Valck.Sur. form synonym

Melocactus actinacanthus Areces species synonym

Melocactus aciculosus var. adauctus Valck.Sur. variety synonym

Melocactus communis Duss, 1897 species synonym

Cactus antonii Britton species synonym

Melocactus acunae subsp. lagunaensis Z.Mészáros subspecies synonym

Melocactus intortus (Mill.) Urb. species accepted

Melocactus broadwayi (Britton & Rose) A.Berger species accepted

Melocactus macracanthos var. miacanthus Valck.Sur. variety synonym

Melocactus harlowii subsp. radoczii (Z.Mészáros) Guiggi subspecies synonym

Melocactus macracanthos f. elegans Valck.Sur. form synonym

Cactus broadwayi Britton & Rose species synonym

Cactus melocactus L. species synonym

Cactus matanzanus (León) Borg species synonym

Melocactus cephalonoplus Lem. species homotypic synonym

Melocactus andinus R.Gruber species homotypic synonym

Echinocactus spina-christi Zucc. species homotypic synonym

Melocactus ferox Pfeiff. species homotypic synonym

Melocactus hookerianus J.Forbes species homotypic synonym

Cactus hexagonus Lam. species synonym

Melocactus depressus Haw. species synonym

Cactus intortus f. desiradensis Stehlé form synonym

Cactus townsendii Britton & Rose species synonym

Cactus parvispinus Haw. species synonym