Malacocarpus see under Wigginsia.
Mamillopsis diguetii (Web.) B. & R. = status uncertain.
M. senilis (S-D) B. & R. = Mammillaria senilis [attrib. to Lodd. by] S-D.
Mammillaria acanthoplegma Lem. = status doubtful.
M. affinis DC = Mammillaria polythele Mart.
M. albescens Tiegel = Mammillaria decipiens Scheidw. with white spines.
M. albiarmata Boed. = Mammillaria coahuilensis (Boed.) Moran.
M. albida Haage ex Pfeiff. = Mammillaria discolor Haw.
'M. albidula' Bkbg. = Mammillaria conspicua Purpus.
'M. aljibensis' = catalogue name = ?Mammillaria perbella Hildm. ex Sch.
M. ancistroides Lem. = status doubtful.
M. alpina' hort. = catalogue name = Mammillaria kraehenbuehlii (Krainz) Krainz.
M. amoena Hopfer ex S-D = Mammillaria discolor Haw.
M. angularis Link & Otto = Mammillaria compressa DC.
M. applanata Engelm. = Mammillaria heyderi Muehl.
M. armatissima Craig = Mammillaria gigantea Hildm. ex Sch.
M. ascensionis Repp. = Mammillaria glassii v. ascensionis Glass & Foster.
M. atroflorens Bkbg. = Mammillaria mystax Mart.
M. aureiceps Lem. = Mammillaria rhodantha Link & Otto.
M. aureoviridis Heinr. = status doubtful.
M. auriareolis Tiegel = Mammillaria parkinsonii Ehrenb.
M. auricantha Craig = Mammillaria canelensis Craig.
M. auricoma Dietr. = Mammillaria spinosissima Lem.
M. aurisaeta Bkbg. = Mammillaria picta Meins.
M. auritricha Craig = Mammillaria canelensis Craig.
M. avila-camachoi Shurly n.n. = Mammillaria parkinsonii Ehrenb.
M. aylostera Werd. = Mammillaria beneckei Ehrenb.
M. bachmannii Boed. = status doubtful.
M. balsasensis Boed. = Mammillaria beneckei Ehrenb.
M. balsasoides Craig = Mammillaria beneckei Ehrenb.
M. barkeri Shurly n.n. = Mammillaria beneckei Ehrenb.
M. bellacantha Craig = Mammillaria canelensis Craig.
M. bellisiana Craig = Mammillaria sonorensis Craig.
M. bicornuta Tiegel n.n. = Mammillaria bucareliensis Craig.
M. boedekeriana Quehl = status doubtful.
M. bogotensis Werd. = Mammillaria columbiana S-D.
M. bonavitii Schmoll = ?Mammillaria discolor form.
M. bravoae Craig = Mammillaria hahniana Werd.
M. buchenauii Bkbg. = Mammillaria crucigera Mart.
M. bullardiana (Gates) Boed. = Mammillaria hutchisoniana (Gates) Boed.
'M. cadereytana' = catalogue name = Mammillaria pygmaea (B. & R.) Berg.
M. caerulea Craig = Mammillaria chionocephala Purpus.
M. calleana Bkbg. = Mammillaria wildii Dietr.
M. casoi H. Bravo = Mammillaria mystax Mart.
M. celsiana Lem. = nom. dub., plants supplied under this name are invariably Mammillaria muehlenpfordtii.
M. centricirrha Lem. = Mammillaria magnimamma Haw.
M. chavezii Cowper = Mammillaria viridiflora (B. & R.) Boed.
M. cirrhifera Mart. = Mammillaria compressa DC.
M. collina Purpus = Mammillaria haageana Pfeiff.
M. collinsii (B. & R.) Orcutt = Mammillaria voburnensis v. collinsii (B. & R.) Repp.
M. colonensis Craig = Mammillaria beneckei Ehrenbg.
M. confusa (B. & R.) Orcutt = Mammillaria karwinskiana Mart.
M. conzattii (B. & R.) Orcutt = Mammillaria karwinskiana Mart.
M. coronaria Sch. = status doubtful.
M. cowperae Shurly = Mammillaria moellerana Boed.
M. criniformis DC = ?Mammillaria crinita DC.
M. crispiseta Craig = Mammillaria mystax Mart.
M. crocidata Lem. = status doubtful.
M. dawsonii (Houghton) Craig = Mammillaria glareosa Boed.
M. dealbata Dietr. = Mammillaria haageana Pfeiff.
M. deliusiana Shurly = Mammillaria hella Bkbg.
M. denudata (Engelm.) Berg = Mammillaria lasiacantha Engehn.
M. diacentra Jac. = status doubtful.
M. diguetii (Weber) D. Hunt = Mammillaria senilis [Att. to Lodd by S-D
M. dodsonii Bravo = Mammillaria deherdtiana v. dodsonii (Bravo) Glass & Foster.
M. dolichocentra Lem. = Mammillaria obconella Scheidw.
M. donatii Berg. ex Sch. = status doubtful.
M. dyckiana Zucc. = Mammillaria haageana Pfeiff.
M. ebenacantha Schmoll = Mammillaria karwinskiana Mart.
M. echinaria DC = Mammillaria elongata DC.
M. egregia Bkbg. = Mammillaria lasiacantha Engelm.
M. eichlamii Quehl = Mammillaria voburnensis v. eichlamii (Quehl) Repp.
M. ekmanii Werd. = ?Mammillaria mammilaris (L.) Karst.
M. elegans v. schmollii Craig = Mammillaria meissneri Ehrenb.
M. erectohamata Boed. = status doubtful.
M. ernestii Fittkau = Mammillaria backebergiana v. ernestii (Fitt.) Glass & Foster.
M. esperanzaensis Boed. = Mammillaria discolor Haw.
'M. essaussieri' = catalogue name = Mammillaria densispina (Coulter) Orcutt.
M. esseriana Boed. = status doubtful.
M. estanzuelensis Moeller = Mammillaria candida Scheid.
M. estebanensis Lindsay = Mammillaria angelensis v. estebanensis (Lindsay) Repp.
M. euthele Bkbg. n.n. = Mammillaria melanocentra Poselg.
M. fasciculata Engelm. = Mammillaria thornberi Orcutt.
M. fertilis Hildm. = Mammillaria backebergiana Buchenau.
M. fischeri Pfeiff. = Mammillaria karwinskiana Mart.
M. flavescens Haw. = Mammillaria nivosa Link ex Pfeiff.
M. flavescens v. nivosa (Link) Bkbg. = Mammillaria nivosa Link ex Pfeiff.
M. flavicentra Bkbg. = Mammillaria dixanthocentron v. flavicentra (Bkbg.) Repp.
M. flavihamata Bkbg. = Mammillaria jaliscana (B. & R.) Boed.
M. flavovirens S-D = Mammillaria magnimamma Haw.
M. floresii Bkbg. = Mammillaria canelensis Craig.
M. fragilis S-D = Mammillaria gracilis Pfeiff.
M. fuliginosa S-D = status doubtful.
M. fuscata Link & Otto = Mammillaria rhodantha Link & Otto.
M. garessii Cowper = Mammillaria barbata Engelm.
M. ginsaumae' = hort. var. = Mammillaria discolor Haw.
M. gladiata Mart. = Mammillaria magnimamma Haw.
M. glochidiata Mart. = status doubtful.
M. goldii Glass & Foster = Mammillaria saboae v. goldii (G. & F.) Glass & Foster.
M. goodridgii v. rectispina Dawson = Mammillaria rectispina (Dawson) Repp.
M. graessneriana Boed. = status doubtful.
M. gueldemanniana Bkbg. = ?Mammillaria sheldonii (B. & R.) Boed.
M. guiengolensis Bravo = Mammillaria beneckei Ehrenbg.
M. guillauminiana Bkbg. = Mammillaria mercadensis v. guillauminiana (Bkbg.) Repp.
M. guirocobensis Craig = ?Mammillaria sheldonii (B. & R.) Boed.
M. gummifera v. macdougalii (Rose) Benson = Mammillaria macdougalii Rose.
M. gummifera v. meiacantha (Engelm.) Benson = Mammillaria meiacantha Engelm.
'M. haasii' = catalogue name = Mammillaria virginis Fitt. & Kladiwa.
M. haehneliana Boed. = Mammillaria knebeliana Boed.
M. halbingeri Boed. = status doubtful.
M. hamata Lehmann ex Pfeiff. = nom. dub., plants currently supplied as this are similiar to Mammillaria duoformis Craig & Dawson.
M. hamiltonhoytea (Bravo) Werd. = Mammillaria gigantea Hildm. ex Sch.
M. hastifera Krainz & Keller = Mammillaria gigantea Hildm. ex Sch.
M. haudeana Lau & Wagner = Mammillaria saboae fa. haudeana (Lau & Wagner) D. Hunt.
M. haynei Ehrenb. = status doubtful.
M. heeriana Bkbg. n.n. = status doubtful., plants supplied as this are similar to Mammillaria duoformis Craig & Dawson.
M. hemisphaerica Engelm. = Mammillaria heyderi v. hemisphaerica (Engehn.) Engelm.
M. hennisii Boed. = Mammillaria columbiana S-D.
M. heyderi v. macdougalii (Rose) Benson = Mammillaria macdougalii Rose.
M. heyderi v. meiacantha (Engelm.) Benson = Mammillaria meiacantha Engelm.
M. hidalgensis Purpus = Mammillaria polythele Mart.
'M. hildmannii' = catalogue name.
M. hoffmanniana (Tiegel) Bravo = Mammillaria polythele Mart.
M. huriana' = catalogue name.
M. icamolensis Boed. = status doubtful.
M. inaiae Craig = Mammillaria sheldonii (B. & R.) Boed.
M. infernillensis Craig = Mammillaria parkinsonii Ehrenb.
M. ingens Bkbg. = Mammillaria polythele Mart.
M. kelleriana Schmoll ex Craig = Mammillaria polythele Mart.
M. kewensis S-D = Mammillaria polythele Mart.
'M. kladiwae = hort. = ?Mammillaria spinosissima Lem.
M. kuentziana P. & B. Fearn = Mammillaria vetula Mart.
M. kunthii Ehrenb. = Mammillaria haageana Pfeiff.
M. kunzeana Boed. & Quehl = status doubtful., plants supplied as this are usually Mammillaria bocasana Poselg.
M. lanata (B. & R.) Orcutt = Mammillaria supertexta Mart. ex Pfeiff.
M. laneusumma Craig = Mammillaria canelensis Craig.
M. lauii fa. subducta D. Hunt = Mammillaria subducta (D. Hunt) Repp.
M. lengdobleriana Boed. = status doubtful.
M. Isona Poselg. = Mammillaria pottsii Scheer ex S-D.
M. lesaunieri (Rebut) Sch. = status doubtful.
M. leucocentra Berg. = ?Mammillaria geminispina Haw.
M. macracantha DC = Mammillaria magnimamma Haw.
M. magneticola Meyran = Mammillaria vetula Mart.
M. marneriana Bkbg. = Mammillaria grahamii v. oliviae (Orcutt) Benson.
M. marshalliana (Gates) Boed. ex Bkbg. = Mammillaria baxteriana (Gates) Boed.
M. martinezii Bkbg. = Mammillaria supertexta Mart.
M. mayensis Craig = Mammillaria canelensis Craig.
M. melispina Werd. = status doubtful.
M. mendeliana (Bravo) Werd. = Mammillaria hahniana Werd.
M. meridiorosei Castetter et al = Mammillaria wrightii v. wilcoxii (Toumey ex Sch.) Marshall.
M. mexicensis Craig = status doubtful.
M.michoacanensis' = catalogue name = ?Mammillaria meyranii Bravo.
M. microcarpa Engelm. = Mammillaria milleri (B. & R.) Boed.
M. microcarpa v. grahamii Engelm. = Mammillaria grahamii Engelm.
M. microheliopsis Werd. = Mammillaria microhelia Werd.
M. mitlensis Bravo = Mammillaria rekoi (B. & R.) Vpl.
M. mixtecensis Bravo = Mammillaria casoi Bravo.
M. mollihamata Shurly = Mammillaria pygmaea (B. & R.) Berg.
M. monancistracantha Bkbg. = Mammillaria nana Bkbg. ex Mottram.
M. monocentra Jac. = status doubtful.
M. montensis Craig = ?Mammillaria canelensis Craig.
M. morricalii Cowper = Mammillaria barbata Engelm.
M. movensis Craig = Mammillaria standleyi (B. & R.) Orcutt
M. multicentralis Craig = status doubtful.
M. multiceps S-D = Mammillaria prolifera (Miller) Haw.
M. multiformis (B. & R.) Boed. = Mammillaria erythosperma Boed.
M. multihamata Boed. = status doubtful.
M. multiseta Ehrenb. = Mammillaria karwinskiana Mart.
M. mutabilis Scheidw. = Mammillaria mystax Mart.
M. nealegiana Bkbg. = status doubtful.
M. nelsonii (B. & R.) Boed. = Mammillaria beneckei Ehrenb.
M. neobertrandiana Bkbg. = Mammillaria magallanii Schmoll.
M. neocoronaria Knuth = status doubtful.
M. neocrucigera Bkbg. = status doubtful.
M. neomystax Bkbg. = Mammillaria mystax Mart.
M. neophaeacantha Bkbg. = Mammillaria polythele Mart.
M. neopotosina Craig = Mammillaria muehlenpfordtii Foerst.
M. neoschwarzeana Bkbg. = Mammillaria bocensis Craig.
M. obscura Hildm. = ?Mammillaria petterssonii Hildm.
M. obvallata Otto ex Dietr. = status doubtful.
M. ocamponis Ochot. = Mammillaria mercadensis v. guillauminiana (Bkbg.) Repp.
M. ochoterenae (Bravo) Werd. = Mammillaria discolor Haw.
M. ocotillensis Craig = Mammillaria gigantea Hildm.
M. oliviae Orcutt = Mammillaria grahamii v. oliviae (Orcutt) Benson.
M. orestera Benson = Mammillaria viridiflora (B. & R.) Boed.
M. ortegae (B. & R.) Orcutt = Mammillaria scrippsiana (B. & R.) Orcutt.
'M. ortiz-rubiona' (Bravo) Weid. = Mammillaria candida Scheid.
M. pachyrhiza Bkbg. = Mammillaria discolor Haw.
M. painteri Rose ex Quehl see under Mammillaria pygmaea.
M. palmeri Jac. non Boed. = status doubtful.
M. parensis Craig = Mammillaria pringlei (Coulter) K. Brandegee.
M. patonii (Bravo) Boed. = Mammillaria mazatlanensis Sch.
M. pectinifera fa. solisoides (Bkbg.) S.-Mejorada = Mammillaria solisioides Bkbg.
M. pennispinosa v. nazasensis Glass & Foster = Mammillaria nazasensis (Glass & Foster) Repp.
M. pentacantha Pfeiff. = status doubtful.
M. phaeacantha Lem. = status doubtful.
M. phymatothele Berg. = status doubtful.
M. pilensis Shurly = Mammillaria petterssonii Hildm.
M. pitcayensis = incorrect spelling of Mammillaria pilacayensis Bravo.
M. polygona S-D = status doubtful.
M. posseltiana Boed. = Mammillaria rettigiana Boed.
M. praelii Muehlpf = status doubtful.
M. pseudoalamensis Bkbg. = Mammillaria grahamii v. oliviae (Orcutt) Benson.
M. pseudorekoi [attrib. to (Rose) Boed. (1931) by] Boed. = nom. dub.
M. pseudoschiedeana' hort. = Mammillaria dumetorum Purpus.
M. pseudoscrippsiana Bkbg. = Mammillaria scrippsiana (B. & R.) Orcutt.
M. pseudosimplex W. Haage & Bkbg. = Mammillaria mammillaris (L.) Karsten.
'M. pseudosupertexta' = catalogue name.
M. pubispina Boed. =Mammillaria pygmaea (B. & R) Berg.
M. pusilla (DC) Sweet = Mammillaria prolifera (Miller) Haw.
M. pyrrhocephala Scheidw. = Mammillaria karwinskiana Mart.
M. queretatica Craig = Mammillaria parkinsonii Ehrenb.
M. quevedoi' = catalogue name = Mammillaria hahniana Craig.
M. radiaissima Lindsay = Mammillaria baumii Boed.
'M. rawlii' = catalogue name = Mammillaria nana Bkbg.
M. rekoi v. aurispina Lau = Mammillaria aureispina (Lau) Repp.
M. rekoi v. leptacantha Lau = Mammillaria leptacantha (Lau) Repp.
M. rekoiana' Craig = Mammillaria rekoi (B. & R) Vpl.
M. rosensis Craig = Mammillaria parkinsonii Ehrenb.
M. roseocentra Boed. & Ritt. = Mammillaria magallanii Schmoll ex Craig.
M. rossiana Heinr. = ?Mammillaria duoformis Craig & Dawson.
M. rubida Schwarz = Mammillaria bocensis v. rubida Repp.
M. runyonii (B. & R.) Boed. = Mammillaria melanocentra Poselg.
M. rutila Zucc. ex Pfeiff. = status doubtful.
M. saboae v. theresae (Cutak) Rowley = Mammillaria theresae Cutak.
M. saffordii (B. & R.) Bravo = Mammillaria carretii Rebut ex Sch.
M. sanluisensis Shurly = Mammillaria pilispina Purpus.
M. santaclarensis Cowper = Mammillaria barbata Engelm.
M. scheidweilerana Otto ex A. Dietr. = Mammillaria erythrosperma Boed.
M. schelhasii Pfeiff. = status doubtful, plants supplied as this are usually Mammillaria bocasana.
M. schieliana Schick. = Mammillaria picta Meins.
M. schmollii (Bravo) Werd. = Mammillaria discolor Haw.
'M. schmuckeri' hort. Schmoll = status doubtful.
M. schwartzii (Boed.) Buxb. = Mammillaria coahuilensis (Boed.) Moran.
M. seideliana Quehl = status doubtful.
M. seitziana Mart. ex Pfeiff. = status doubtful.
M. shurliana Gates ex Shurly = Mammillaria blossfeldiana v. shurliana (Gates) Wiggins.
M. simplex Haw. = Mammillaria mammillaris (L.) Karsten.
M. sinaloensis (Rose ex Ortega) Mottram = Mammillaria mazatlanensis Sch.
M. slevinii (B. & R.) Boed. = Mammillaria albicans (B. & R.) Berg.
M. soehlemannii W. Haage & Bkbg. = Mammillaria columbiana Salm-Dyck.
M. solisti (B. & R.) Boed. = Mammillaria nunezii (B. & R.) Orcutt.
M. stampferi Repp. = Mammillaria longiflora fa. stampferi (Repp.) D. Hunt.
M. stella-de-tacubaya Heese = identification uncertain.
M. subdurispina Bkbg. = Mammillaria polythele Mart.
M. subtilis Bkbg. = Mammillaria pilispina J.A. Purpus
M. tamayonis Killip ex L. Schnee = Mammillaria columbiana Salm-Dyck.
M. tenampensis (B. & R.) Berg. = Mammillaria sartorii Purpus
M. tetracantha S-D = Mammillaria onnella Scheidw.
M. tetracentra [attrib. to Otto by] Foerst. = status doubtful.
M. tiegeliana Bkbg. = Mammillaria parkinsonii Ehrenb.
M. tricacantha Sch. = status doubtful.
M. trohartii Hildm. ex Sch. = Mammillaria magnimamma Haw.
M. umbrina Ehrenbg. = status doubtful.
M. unihamata Boed. = Mammillaria weingartiana Boed.
M. vagaspina Craig = Mammillaria magnimamma Haw.
M. vaupelii Tiegel = Mammillaria haageana Pfeiff.
M. verhaertiana Boed. = status doubtful.
M. viescensis' = catalogue name = Mammillaria chica Repp.
M. vonwyssiana Krainz = Mammillaria parkinsonii Ehrenb.
M. wilcoxii v. viridiflora (B. & R.) Marshall & Bock = Mammillaria viridiflora (B. & R.) Boed.
M. woodsii Craig = Mammillaria hahniana Werd.
M. wrightii v. viridiflora (B. & R.) Marshall = Mammillaria viridiflora (B. & R.) Marshall.
M. wrightii v. wilcoxii (Toumey) Marshall = Mammillaria wilcoxii Toumey ex Sch.
M. wolfii' = Mammillaria wrightii v. wolfii (D. Hunt) Repp.
M. wuthenauiana Bkbg. = Mammillaria nunezii (B. & R.) Orcutt.
M. xanthina (B. & R.) Boed. = status doubtful.
M. zahniana Boed. = Mammillaria winterae Boed.
M. zapilotensis Craig = Mammillaria guerreronis (Bravo) [attrib. to Boed. by] Bkbg. & Knuth.
Matucana armillata' = Matucana haynei (Otto) B. & R.
M. blancii Bkbg. = Matucana haynei (Otto) B. & R.
M. breviflora Rauh & Bkbg. = 'Matucana haynei v. breviflora'.
'M. caespitosa' = Matucana paucicostata Ritt.
M. calliantha Ritt. = Matucana krahnii (Don.) Bregman.
M. calocephala Skarupke = Matucana myriacantha (Vpl). Bux.
M. calvescens (Kim. & Hutch.) Bux. = Matucana aurantiaca (Vpl.) Bux.
M. celendinensis Ritt. = Matucana intertexta v. celendinensis (Ritt.) Bregman.
M. cereoides Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
M. clavispina' = Matucana haynei (Otto) B. & R.
M. currundayensis Ritt. = Matucana aurantiaca (Vpl.) Bux.
M. elongata Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
M. eriodisca' = Matucana paucicostata Ritt.
M. herzogiana Bkbg. = Matucana haynei (Otto) B. & R.
'M. huaricensis' = Matucana paucicostata Ritt.
M. huarinensis Knize n.n. = Matucana myriacantha (Vpl.) Bux.
M. hystrix Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
M. multicolor Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
M. paucispina' = Matucana paucicostata Ritt.
M. purpureoalba Ritt. = Matucana myriacantha (Vpl.) Bux.
M. roseoalba Ritt. n.n. = Matucana myriacantha (Vpl.) Bux.
'M. senile' = Matucana paucicostata Ritt.
M. senilis' = Matucana paucicostata Ritt.
M. supertexta Ritt. = Matucana haynei (Otto) B. & R.
M. turbiniformis' = Matucana paucicostata Ritt.
M. variabilis Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
M. villarica' = Matucana haynei (Otto) B. & R.
M. winteri Ritt. = Matucana myriacantha (Vpl.) Bux.
M. yanganucensis Rauh & Bkbg. = Matucana haynei (Otto) B. & R.
Mediolobivia Not included below are a number of invalid combinations, (originally published as nomena nuda in this genus), from seed and plant merchants' catalogues. If not listed, these names should be sought under Rebutia.
Mediolobivia albopectinata Rausch = Rebutia albopectinata Rausch.
M. auranitida (Wessn.) Krainz = Rebutia einsteinii Fric.
M. aureiflora (Bkbg.) Bkbg. and vars. = 'Rebutia einsteinii v. aureifiora'
M. brunescens Rausch = Rebutia brunescens Rausch.
M. conoidea (Wessn.) Krainz = Rebutia einsteinii Fric.
M. costata (Werd.) Krainz = 'Rebutia steinmannii v. costata'.
M. duursmaiana Bkbg. = 'Rebutia einsteinii v. aureifiora'.
M. elegans Bkbg. = Rebutia einsteinii Fric.
M. euanthema (Bkbg.) Krainz. = Rebutia euanthema (Bkbg.) Buin. & Don.
M. eucaliptana (Bkbg.) Krainz = Rebutia steinmannii (Solms-Laub.) B. & R.
M. fuauxiana Bkbg. = status doubtful.
M. haefneriana Cullm. = ?Rebutia pygmaea (Fries.) B. & R.
M. ithyacantha Card. = Rebutia ithyacantha (Card.) Diers.
M. nigricans (Wessn.) Krainz = Rebutia ritteri (Wessn.) Buin. & Don.
M. orurensis Bkbg. = 'Rebutia pygmaea v. orurensis'.
M. pectinata (Bkbg.) Bkbg. non Fric = Rebutia pygmaea (Fries.) B. & R.
M. pectinata v. orurensis (Bkbg.) Bkbg. = 'Rebutia pygmaea v. orurensis'.
M. pygmaea Bkbg. = 'Rebutia pygmaea v. haagei'.
M. ritteri (Wessn.) Krainz = Rebutia ritteri (Wessn.) Don.
M. rubelliflora Bkbg. = 'Rebutia einsteinii v. aureifiora'.
M. rubriflora Bkbg. = 'Rebutia einsteinii v. aureifiora'.
M. schmiedcheniana (Koehl.) Krainz and vars. = Rebutia einsteinii Fric.
M. spiralisepala Jajo = status doubtful.
'Melocactus alpestris' = Melocactus peruvianus Vpl.
M. amstutziae Rauh & Bkbg. = Melocactus peruvianus Vpl.
M. azulensis Buin. et. al. = Melocactus oreas subsp. ernestii (Vpl.) Braun.
M. chalensis' = Melocactus peruvianus Vpl.
M. cremnophilus Buin. & Bred. = Melocactus oreas Miqu.
M. ernestii Vpl. = Melocactus oreas subsp. ernestii (Vpl.) Braun.
M. erythracanthus Buin. & Bred. = Melocactus oreas Miqu.
M. huallancaensis Rauh & Bkbg. = Melocactus peruvianus Vpl.
M. jansenianus Bkbg. = Melocactus peruvianus Vpl.
M. longispinus Buin. et. al. = Melocactus oreas Miqu.
M. nitidus Ritt. = Melocactus oreas subsp. ernestii (Vpl.) Braun.
M. rubrisaetosus Buin. et. al. = Melocactus oreas Miqu.
M. trujilloensis Rauh & Bkbg. = Melocactus peruvianus (Vpl.)
M. unguispinus Bkbg. = Melocactus peruvianus Vpl.
Mila: for all published names see Mila caespitosa B. & R.