The Plant List — A working list for all plant species

⚠ Version 1 of The Plant List has been superseded.

You should refer instead to the current version of The Plant List.

Results

No plant names match your search for Mammillaria guameri; we will try Mammillaria instead.

1358 plant name records match your search criteria Mammillaria. The results are below.

• Genus Mammillaria is in the family Cactaceae. Species epithets begin with: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

The results can also be downloaded as a CSV file.

See "Status", "Confidence level", "Source" for definitions.

Name	Status	Confi­dence level	Source
Mammillaria acanthophlegma Lehm.	Synonym		TRO
Mammillaria acanthostephes Lehm.	Synonym		TRO
Mammillaria acicularis Lem.	Synonym		TRO
Mammillaria aciculata Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria aciculatus Otto ex Pfeiff.	Unresolved		TRO
Mammillaria acifer Jacobi	Unresolved		TRO
Mammillaria actinoplea Ehrenb.	Synonym		TRO
Mammillaria acultzingensis T. Linzen et al.	Synonym		TRO
Mammillaria adunca Scheidw. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria aeruginosus Scheidw.	Unresolved		TRO
Mammillaria affinis DC.	Synonym		TRO
Mammillaria aggregata Engelm. ex S. Watson	Synonym		TRO
Mammillaria alamensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria albata Repp.	Unresolved		WCSP (in review)
Mammillaria albescens Tiegel	Synonym		TRO
Mammillaria albiarmata Boed.	Synonym		TRO
Mammillaria albicans (Britton & Rose) A. Berger	Accepted		TRO
Mammillaria albicans subsp. albicans	Accepted		TRO
Mammillaria albicans subsp. fraileana (Britton & Rose) D.R. Hunt	Accepted		TRO
Mammillaria albicans f. fraileana (Britton & Rose) Lüthy	Synonym		TRO
Mammillaria albicoma Boed.	Accepted		TRO
Mammillaria albida Haage ex Pfeiff.	Synonym		TRO
Mammillaria albidula Backeb. ex Repp.	Synonym		TRO
Mammillaria albiflora Backeb.	Accepted		TRO
Mammillaria albilanata Backeb.	Accepted		TRO
Mammillaria albilanata subsp. oaxacana D.R. Hunt	Accepted		TRO
Mammillaria albilanata subsp. reppenhagenii (D.R. Hunt) D.R. Hunt	Accepted		TRO
Mammillaria albilanata subsp. tegelbergiana (H.E. Gates ex G.E. Linds.) D.R. Hunt	Accepted		TRO
Mammillaria albiseta C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria albrechtiana Wohlschl.	Unresolved		WCSP (in review)
Mammillaria aloides Monv. ex Labour.	Unresolved		WCSP (in review)
Mammillaria alpina Mart. ex Salm-Dyck	Synonym		TRO
Mammillaria alversonii (J.M. Coult.) Zeiss.	Synonym		TRO
Mammillaria amabilis Ehrenb.	Synonym		TRO
Mammillaria amajacensis Brachet & M. Lacoste	Accepted		TRO
Mammillaria ambigua G.Don ex Loudon	Unresolved		WCSP (in review)
Mammillaria amoena Hoppfer ex Salm-Dyck	Synonym		TRO
Mammillaria anancistria Lem.	Unresolved		WCSP (in review)
Mammillaria ancistracantha Lem.	Synonym		TRO
Mammillaria ancistrata Scheidw. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria ancistria Lem.	Synonym		TRO
Mammillaria ancistroides Lehm.	Synonym		TRO
Mammillaria andreae Pfeiff. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria andreae J.A.Purpus & Boed.	Unresolved		WCSP (in review)
Mammillaria angelensis R.T. Craig bis	Synonym		TRO
Mammillaria angelensis var. estebanensis (G.E. Linds.) Repp.	Synonym		TRO
Mammillaria anguinea Otto ex Salm-Dyck	Synonym		TRO
Mammillaria angularis G.K. Link & Otto	Synonym		TRO
Mammillaria anisacantha Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria anniana Glass & R.C. Foster	Accepted		TRO
Mammillaria antesbergeriana A.B. Lau	Synonym		TRO
Mammillaria apamensis Repp.	Synonym		TRO
Mammillaria apozolensis Repp.	Unresolved		WCSP (in review)
Mammillaria applanata Engelm.	Synonym		TRO
Mammillaria areolosa (Lem.) Hemsl.	Synonym		TRO
Mammillaria argentea Fennel in Otto & A. Dietr.	Synonym		TRO
Mammillaria arida Rose ex Quehl	Synonym		TRO
Mammillaria arietina Lem.	Synonym		TRO
Mammillaria arizonica Engelm.	Synonym		TRO
Mammillaria arizonica var. alversonii (J.M. Coult.) Davidson & Moxley	Synonym		TRO
Mammillaria armatissima R.T.Craig	Unresolved		WCSP (in review)
Mammillaria armillata K. Brandegee	Accepted		TRO
Mammillaria armillata subsp. cerralboa (Britton & Rose) D.R. Hunt	Synonym		TRO
Mammillaria arroyensis Repp.	Unresolved		WCSP (in review)
Mammillaria ascensionis Repp.	Synonym		TRO
Mammillaria ascensionis var. nominis-dulcis (A.B. Lau) Repp.	Synonym		TRO
Mammillaria aselliformis (Ehrenb.) H.P.Kelsey & Dayton	Unresolved		WCSP (in review)
Mammillaria asterias Cels ex Salm-Dyck, L.	Synonym		TRO
Mammillaria atrata Hook.	Synonym		TRO
Mammillaria atroflorens Backeb.	Unresolved		WCSP (in review)
Mammillaria atrorubra Ehrenb.	Synonym		TRO
Mammillaria atrosanguinea Ehrenb.	Synonym		TRO
Mammillaria aulacantha DC.	Synonym		TRO
Mammillaria aulacothele Lem.	Synonym		TRO
Mammillaria aurata Pfeiff.	Unresolved		WCSP (in review)
Mammillaria aurea C.F.Först.	Unresolved		WCSP (in review)
Mammillaria aureiceps Lem.	Synonym		TRO
Mammillaria aureilanata Backeb.	Accepted		TRO
Mammillaria aureispina (A.B.Lau) Repp.	Unresolved		WCSP (in review)
Mammillaria aureoviridis Heinrich	Unresolved		WCSP (in review)
Mammillaria auriareolis Tiegel	Unresolved		WCSP (in review)
Mammillaria auricantha	Synonym		TRO
Mammillaria auricoma A. Dietr.	Synonym		TRO
Mammillaria aurihamata Boed.	Accepted		TRO
Mammillaria aurisaeta Backeb.	Unresolved		WCSP (in review)
Mammillaria auritricha R.T.Craig	Unresolved		WCSP (in review)
Mammillaria aurorea A.Dietr.	Unresolved		WCSP (in review)
Mammillaria autumnalis A.Dietr.	Unresolved		WCSP (in review)
Mammillaria avila-camachoi Shurly	Unresolved		WCSP (in review)
Mammillaria aylostera Werderm.	Unresolved		WCSP (in review)
Mammillaria bachmannii Boed.	Unresolved		WCSP (in review)
Mammillaria backebergiana F.G. Buchenau	Accepted		TRO
Mammillaria backebergiana subsp. backebergiana	Accepted		TRO
Mammillaria backebergiana subsp. ernestii (Fittkau) D.R. Hunt	Accepted		TRO
Mammillaria backebergiana var. ernestii (Fittkau) Glass & R.A. Foster	Synonym		TRO
Mammillaria badispina C.F.Först.	Unresolved		WCSP (in review)
Mammillaria balsasensis Boed.	Unresolved		WCSP (in review)
Mammillaria balsasoides R.T.Craig	Unresolved		WCSP (in review)
Mammillaria bambusiphila Repp.	Synonym		TRO
Mammillaria barbata Engelm.	Accepted		TRO
Mammillaria barbata var. garessii (Cowper) J. Lode	Synonym		TRO
Mammillaria barbata var. morricalii (Cowper) J. Lode	Synonym		TRO
Mammillaria barbata var. santaclarensis (Cowper) J. Lode	Synonym		TRO
Mammillaria barkeri Shurly	Unresolved		WCSP (in review)
Mammillaria barlowii Regel & Klein	Synonym		TRO
Mammillaria baumii Boed.	Accepted		TRO
Mammillaria baxteriana (H.E. Gates) Boed.	Synonym		TRO
Mammillaria beiselii Diers	Synonym		TRO
Mammillaria bella Backeb.	Synonym		TRO
Mammillaria bellacantha R.T.Craig	Unresolved		WCSP (in review)
Mammillaria bellatula Foerster	Synonym		TRO
Mammillaria bellisiana R.T.Craig	Unresolved		WCSP (in review)
Mammillaria beneckei Ehrenb.	Accepted		TRO
Mammillaria beneckei var. multiceps Repp.	Synonym		TRO
Mammillaria bergenii Ehrenb.	Unresolved		WCSP (in review)
Mammillaria bergii Miq.	Unresolved		WCSP (in review)
Mammillaria berkiana A.B. Lau	Accepted		TRO
Mammillaria bernalensis Repp.	Unresolved		WCSP (in review)
Mammillaria bicolor Lehm.	Unresolved		WCSP (in review)
Mammillaria bicolor var. nobilis (Pfeiff.) C.F. Först.	Synonym		TRO
Mammillaria bifurca A.Dietr.	Unresolved		WCSP (in review)
Mammillaria biglandulosa Pfeiff.	Synonym		TRO
Mammillaria bihamata Pfeiff.	Synonym		TRO
Mammillaria binops J.N.Haage ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria blossfeldiana Boed.	Accepted		TRO
Mammillaria blossfeldiana var. shurliana Wiggins	Synonym		TRO
Mammillaria bocasana Poselger	Accepted		TRO
Mammillaria bocasana subsp. eschauzieri (J.M. Coult.) Fitz Maurice & B. Fitz Maurice	Accepted		TRO
Mammillaria bocensis Craig	Accepted		TRO
Mammillaria bockii Foerster	Synonym		TRO
Mammillaria boedekeriana Quehl	Synonym		TRO
Mammillaria boelderliana Wohlschl.	Accepted		TRO
Mammillaria bogotensis Werderm.	Unresolved		WCSP (in review)
Mammillaria bombycina Quehl	Accepted		TRO
Mammillaria bombycina subsp. perezdelarosae (Bravo & Scheinvar) D.R. Hunt	Synonym		TRO
Mammillaria bonavitii Repp.	Unresolved		WCSP (in review)
Mammillaria bonavitii Schmoll ex Backeb.	Unresolved		WCSP (in review)
Mammillaria boolii G.E. Linds.	Accepted		TRO
Mammillaria borwigii J.A.Purpus	Unresolved		WCSP (in review)
Mammillaria brachytrichion Lüthy	Synonym		TRO
Mammillaria brandegeei (J.M. Coult.) K. Brandegee	Accepted		TRO
Mammillaria brandegeei subsp. gabbii (Engelm. ex J.M. Coult.) D.R. Hunt	Accepted		TRO
Mammillaria brandegeei subsp. glareosa (Boed.) D.R. Hunt	Accepted		TRO
Mammillaria brandegeei subsp. lewisiana (H.E. Gates) D.R. Hunt	Accepted		TRO
Mammillaria brandegei var. gabbii (Engelm. ex J.M. Coult.) R.T. Craig bis	Synonym		TRO
Mammillaria brauneana Boed.	Unresolved		WCSP (in review)
Mammillaria bravoae R.T. Craig	Synonym		TRO
Mammillaria brevicrinita Repp.	Unresolved		WCSP (in review)
Mammillaria brevimamma Zucc. ex Pfeiff.	Synonym		TRO
Mammillaria breviseta Ehrenb.	Synonym		TRO
Mammillaria brevispina Boed.	Unresolved		WCSP (in review)
Mammillaria brongniartii Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria brownii Toumey	Synonym		TRO
Mammillaria bucareliensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria buchenaui Backeb.	Unresolved		WCSP (in review)
Mammillaria buchheimiana Quehl	Unresolved		WCSP (in review)
Mammillaria bullardiana (H.E.Gates) Boed.	Unresolved		WCSP (in review)
Mammillaria bumamma Ehrenb.	Synonym		TRO
Mammillaria busonii Bachel	Unresolved		WCSP (in review)
Mammillaria bussleri Mundt ex Schum.	Synonym		TRO
Mammillaria buxbaumeriana Repp.	Unresolved		WCSP (in review)
Mammillaria cadereytensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria caerulea R.T. Craig bis	Synonym		TRO
Mammillaria caesia Ehrenb.	Unresolved		WCSP (in review)
Mammillaria caespitia DC.	Unresolved		TRO
Mammillaria caespititia DC.	Synonym		TRO
Mammillaria caespitosa (Engelm.) A.Gray	Unresolved		WCSP (in review)
Mammillaria caespitosa Pfeiff.	Unresolved		WCSP (in review)
Mammillaria calacantha Tiegel	Synonym		TRO
Mammillaria calcarata Engelm.	Synonym		TRO
Mammillaria calleana Backeb.	Unresolved		WCSP (in review)
Mammillaria calochlora auct.	Unresolved		WCSP (in review)
Mammillaria camptotricha Dams	Synonym		TRO
Mammillaria candida Scheidw.	Synonym		TRO
Mammillaria candida var. caespitosa Voss	Synonym		TRO
Mammillaria candida var. estanzuelensis Repp.	Synonym		TRO
Mammillaria candida subsp. ortiz-rubiana (Bravo) Krainz	Synonym		TRO
Mammillaria candida var. ortiz-rubiana (Bravo) B.Hofm.	Synonym		TRO
Mammillaria candida var. rosea Salm-Dyck ex K. Schum.	Synonym		TRO
Mammillaria canelensis R.T. Craig	Synonym		TRO
Mammillaria canescens Jacobi	Unresolved		WCSP (in review)
Mammillaria canescens Pfeiff.	Unresolved		WCSP (in review)
Mammillaria capensis (H.E. Gates) Craig	Accepted		TRO
Mammillaria caput-medusae Otto	Synonym		TRO
Mammillaria caracassana Otto ex Salm-Dyck	Synonym		WCSP (in review)
Mammillaria carmenae Castañeda	Accepted		TRO
Mammillaria carnea Zucc. ex Pfeiff.	Accepted		TRO
Mammillaria carretii Rebut ex K. Schum.	Accepted		TRO
Mammillaria casoi Bravo	Unresolved		WCSP (in review)
Mammillaria castaneoides Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria castaneoides Lem. ex Labour.	Unresolved		WCSP (in review)
Mammillaria catafracta Mart. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria cataphracta Mart. ex Pfeiff.	Unresolved		WCSP (in review)
Mammillaria caudata G.Don ex Loudon	Unresolved		WCSP (in review)
Mammillaria celeriana	Unresolved		TRO
Mammillaria celsiana Lem.	Synonym		TRO
Mammillaria celsiana var. guatemalensis Eichlam	Synonym		TRO
Mammillaria centralifera Repp.	Synonym		TRO
Mammillaria centraliplumosa Fittkau	Synonym		TRO
Mammillaria centraliplumosa var. gracilis Repp.	Synonym		TRO
Mammillaria centricirrha Lem.	Synonym		TRO
Mammillaria centrispina Pfeiff.	Synonym		TRO
Mammillaria cephalophora Salm-Dyck	Synonym		TRO
Mammillaria ceratites Quehl	Synonym		TRO
Mammillaria ceratocentra Bergman	Synonym		TRO
Mammillaria ceratophora Lehm.	Unresolved		WCSP (in review)
Mammillaria cerralboa (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria chaffeyi (Britton & Rose) Backeb.	Unresolved		WCSP (in review)
Mammillaria chapinensis Eichlam & Quehl	Synonym		TRO
Mammillaria chavezei Cowper	Unresolved		WCSP (in review)
Mammillaria chiapensis Repp.	Synonym		TRO
Mammillaria chica Repp.	Unresolved		WCSP (in review)
Mammillaria chionocephala J.A. Purpus	Accepted		TRO
Mammillaria chlorantha Engelm.	Synonym		TRO
Mammillaria chrysacantha Pfeiff.	Synonym		TRO
Mammillaria circumtexta Mart.	Unresolved		WCSP (in review)
Mammillaria cirrhifera Mart.	Synonym		TRO
Mammillaria cirrosa Poselg.	Unresolved		WCSP (in review)
Mammillaria clava Pfeiff.	Synonym		TRO
Mammillaria clavata Scheidw.	Synonym		TRO
Mammillaria claviformis Repp.	Unresolved		WCSP (in review)
Mammillaria coahuilensis (Boed.) Moran	Accepted		TRO
Mammillaria coahuilensis subsp. albiarmata (Boed.) D.R. Hunt	Accepted		TRO
Mammillaria coahuilensis var. albiarmata (Boed.) Hofmann	Synonym		TRO
Mammillaria coahuilensis subsp. coahuilensis	Accepted		TRO
Mammillaria coccinea G.Don	Unresolved		WCSP (in review)
Mammillaria collina J.A. Purpus	Synonym		TRO
Mammillaria collinsii (Britton & Rose) Orcutt	Synonym		TRO
Mammillaria colonensis R.T. Craig bis	Synonym		TRO
Mammillaria columbiana Salm-Dyck	Accepted		WCSP (in review)
Mammillaria columbiana subsp. yucatanensis (Britton & Rose) D.R. Hunt	Accepted		TRO
Mammillaria columnaris Mart.	Unresolved		WCSP (in review)
Mammillaria columnaroides Lawr.	Unresolved		WCSP (in review)
Mammillaria compacta Engelm.	Synonym		TRO
Mammillaria compacticaulis Repp.	Unresolved		WCSP (in review)
Mammillaria compressa DC.	Accepted		TRO
Mammillaria compressa subsp. centralifera (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria compressa subsp. compressa	Accepted		TRO
Mammillaria confinis J.N.Haage ex Walp.	Unresolved		WCSP (in review)
Mammillaria confinis K.Schum.	Unresolved		WCSP (in review)
Mammillaria confusa	Synonym		TRO
Mammillaria conica Haw.	Synonym		TRO
Mammillaria coniflora Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria conimamma Linke	Synonym		TRO
Mammillaria conoidea DC.	Synonym		TRO
Mammillaria conopsea Scheidw.	Synonym		TRO
Mammillaria conspicua J.A. Purpus	Synonym		TRO
Mammillaria conspicua var. vaupelii (Tiegel) Repp.	Synonym		TRO
Mammillaria contacta H.L.Wendl. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria convoluta St.-Lag.	Unresolved		WCSP (in review)
Mammillaria conzattii Orcutt	Unresolved		WCSP (in review)
Mammillaria corbula Herrera	Synonym		TRO
Mammillaria cordigera Heese	Unresolved		WCSP (in review)
Mammillaria corioides Bosch ex Sweet	Unresolved		WCSP (in review)
Mammillaria cornifera DC.	Synonym		TRO
Mammillaria cornifera var. implexicoma (Lem.) Salm-Dyck	Unresolved		TRO
Mammillaria cornuta Hildm. ex Schum.	Synonym		TRO
Mammillaria corollaria Ehrenb.	Synonym		TRO
Mammillaria coronaria Haw.	Unresolved		WCSP (in review)
Mammillaria coronata Scheidw.	Synonym		TRO
Mammillaria coryphides Forbes ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria cowperae Shurly	Unresolved		WCSP (in review)
Mammillaria craigii G.E. Linds.	Synonym		TRO
Mammillaria crassa Repp.	Unresolved		WCSP (in review)
Mammillaria crassimammillis Repp.	Synonym		TRO
Mammillaria crassior Repp.	Synonym		TRO
Mammillaria crassispina Pfeiff.	Synonym		TRO
Mammillaria crebrispina DC.	Synonym		TRO
Mammillaria crebrispina var. nitida (Scheidw.) Labour.	Unresolved		TRO
Mammillaria criniformis DC.	Synonym		TRO
Mammillaria crinigera Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria crinita DC.	Accepted		TRO
Mammillaria crinita subsp. crinita	Accepted		TRO
Mammillaria crinita subsp. leucantha (Boed.) D.R. Hunt	Accepted		TRO
Mammillaria crinita subsp. painteri (Rose) U. Guzmán	Accepted		TRO
Mammillaria crinita subsp. scheinvariana (R. Ortega & Glass in Glass) Fitz Maurice & B. Fitz Maurice	Accepted		TRO
Mammillaria crinita subsp. wildii (A. Dietr.) D.R. Hunt	Accepted		TRO
Mammillaria crispiseta R.T.Craig	Unresolved		WCSP (in review)
Mammillaria crocidata Lem.	Synonym		TRO
Mammillaria crucigera Mart.	Accepted		TRO
Mammillaria crucigera subsp. tlalocii (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria cuneiflora Hitchen ex J.Forbes	Unresolved		WCSP (in review)
Mammillaria curvata Pfeiff.	Unresolved		WCSP (in review)
Mammillaria curvispina Otto	Synonym		TRO
Mammillaria cylindracea DC.	Synonym		TRO
Mammillaria dactylothele Labour.	Unresolved		WCSP (in review)
Mammillaria daedalea Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria daimonoceras Lem. ex Salm-Dyck	Synonym		TRO
Mammillaria dasyacantha Engelm.	Synonym		TRO
Mammillaria dawsonii (Houghton) R.T. Craig bis	Synonym		TRO
Mammillaria dealbata A. Dietr.	Synonym		TRO
Mammillaria decipiens Scheidw.	Accepted		TRO
Mammillaria decipiens subsp. albescens (Tiegel) D.R. Hunt	Accepted		TRO
Mammillaria decipiens subsp. camptotricha (Dams) D.R. Hunt	Accepted		TRO
Mammillaria declivis A.Dietr.	Unresolved		WCSP (in review)
Mammillaria decora C.F.Först.	Unresolved		WCSP (in review)
Mammillaria deficiens Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria deficum C.F.Först.	Unresolved		WCSP (in review)
Mammillaria deflexispina Lem.	Unresolved		WCSP (in review)
Mammillaria deherdtiana Farwig	Accepted		TRO
Mammillaria deherdtiana subsp. dodsonii (Bravo) D.R. Hunt	Accepted		TRO
Mammillaria delaetiana Quehl	Synonym		TRO
Mammillaria densa Link & Otto	Synonym		TRO
Mammillaria densispina (J.M. Coult.) Orcutt	Accepted		TRO
Mammillaria denudata (Engelm.) A.Berger	Unresolved		WCSP (in review)
Mammillaria depressa Scheidw.	Synonym		TRO
Mammillaria deserti Engelm.	Synonym		TRO
Mammillaria diacantha Lem.	Unresolved		WCSP (in review)
Mammillaria diacantha J.N.Haage ex Steud.	Unresolved		WCSP (in review)
Mammillaria diacentra Jacobi	Unresolved		WCSP (in review)
Mammillaria diadema Muehlenpf.	Synonym		TRO
Mammillaria diaphanacantha Lem.	Unresolved		WCSP (in review)
Mammillaria dichotoma Sweet	Unresolved		WCSP (in review)
Mammillaria dietrichii Tiegel	Unresolved		WCSP (in review)
Mammillaria difficilis Quehl	Synonym		TRO
Mammillaria digitalis Ehrenb.	Unresolved		WCSP (in review)
Mammillaria diguetii (F.A.C.Weber) D.R.Hunt	Unresolved		WCSP (in review)
Mammillaria dioica K. Brandegee	Accepted		TRO
Mammillaria dioica subsp. angelensis (R.T. Craig bis) D.R. Hunt	Accepted		TRO
Mammillaria dioica subsp. dioica	Accepted		TRO
Mammillaria dioica subsp. estebanensis (G.E. Linds.) D.R. Hunt	Accepted		TRO
Mammillaria dioica var. incerta (Parish) Munz	Synonym		TRO
Mammillaria dioica var. insularis K. Brandegee	Synonym		TRO
Mammillaria dioica f. phitauiana (E.M. Baxter) Neutel.	Synonym		TRO
Mammillaria dioica f. verhaertiana (Boed.) Neutel.	Accepted		TRO
Mammillaria disciformis DC.	Synonym		TRO
Mammillaria discolor Haw.	Accepted		TRO
Mammillaria discolor var. aciculata (Otto ex Pfeiff.) Salm-Dyck	Synonym		TRO
Mammillaria discolor var. albida (Haage ex Pfeiff.) Salm-Dyck	Accepted		TRO
Mammillaria discolor var. curvispina (Otto) Salm-Dyck	Synonym		TRO
Mammillaria discolor subsp. discolor	Accepted		TRO
Mammillaria discolor subsp. esperanzaensis (Boed.) D.R. Hunt	Synonym		TRO
Mammillaria discolor var. nitens (Otto ex Linke) Salm-Dyck	Accepted		TRO
Mammillaria discolor subsp. ochoterenae (Bravo) U. Guzmán	Accepted		TRO
Mammillaria discolor var. ochoterenae (Bravo) Repp.	Synonym		TRO
Mammillaria discolor subsp. schmollii (Bravo) Linzen	Accepted		TRO
Mammillaria discolor var. schmollii (Bravo) Repp.	Synonym		TRO
Mammillaria divaricata Dieter.	Synonym		TRO
Mammillaria divergens DC.	Synonym		TRO
Mammillaria dixanthocentron Backeb.	Accepted		TRO
Mammillaria dixanthocentron subsp. dixanthocentron	Accepted		TRO
Mammillaria dixanthocentron subsp. flavicentra (Backeb.) U. Guzmán	Accepted		TRO
Mammillaria dixanthocentron var. flavicentra (Backeb.) Repp.	Synonym		TRO
Mammillaria dixanthocentron var. rubrispina R. Wolf	Synonym		TRO
Mammillaria dodsonii Bravo	Synonym		TRO
Mammillaria dolichacantha Lem. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria dolichocentra Lem.	Synonym		TRO
Mammillaria donatii Berge ex K. Schum.	Synonym		TRO
Mammillaria droegeana (K.Schum.) Borg	Unresolved		WCSP (in review)
Mammillaria dumetorum J.A. Purpus	Synonym		TRO
Mammillaria duoformis R.T. Craig & E.Y. Dawson	Accepted		TRO
Mammillaria durangensis Runge ex K. Schum.	Synonym		TRO
Mammillaria durangicola Repp.	Synonym		TRO
Mammillaria durispina Boed.	Synonym		TRO
Mammillaria duwei Rogoz. & Appenz.	Accepted		TRO
Mammillaria dyckiana Zucc. ex Pfeiff.	Synonym		TRO
Mammillaria ebenacantha Shurly	Unresolved		WCSP (in review)
Mammillaria eborina Ehrenb.	Synonym		TRO
Mammillaria eburnea Miq.	Unresolved		WCSP (in review)
Mammillaria echinaria DC.	Synonym		TRO
Mammillaria echinata DC.	Unresolved		WCSP (in review)
Mammillaria echinocactoides Pfeiff.	Synonym		TRO
Mammillaria echinoidea Quehl	Synonym		TRO
Mammillaria echinoides Quehl	Unresolved		WCSP (in review)
Mammillaria echinops Scheidw. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria echinus Engelm.	Synonym		TRO
Mammillaria egregia Backeb. ex Rogoz. & Appenz.	Synonym		TRO
Mammillaria ehrenbergii Pfeiff.	Synonym		TRO
Mammillaria eichlamii Quehl	Synonym		TRO
Mammillaria ekmanii Werderm.	Unresolved		WCSP (in review)
Mammillaria elegans DC.	Synonym		TRO
Mammillaria elegans var. meissneri (Ehrenb.) Hofmann	Synonym		TRO
Mammillaria elegans var. schmollii R.T. Craig bis	Synonym		TRO
Mammillaria elephantidens Lem.	Synonym		TRO
Mammillaria elongata (Salm-Dyck) Hemsl.	Synonym		TRO
Mammillaria elongata DC.	Accepted		TRO
Mammillaria elongata subsp. echinaria (DC.) D.R. Hunt	Accepted		TRO
Mammillaria elongata subsp. elongata	Accepted		TRO
Mammillaria emskoetteriana Quehl	Synonym		TRO
Mammillaria emundtsiana C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria engelmannii Cory	Synonym		TRO
Mammillaria enneacantha Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria erecta Lem.	Synonym		TRO
Mammillaria erectacantha Foerster	Synonym		TRO
Mammillaria erectohamata Boed.	Unresolved		WCSP (in review)
Mammillaria eriacantha Link & Otto ex Pfeiff.	Accepted		TRO
Mammillaria eriantha Pfeiff.	Unresolved		WCSP (in review)
Mammillaria erinacea H. Wendl.	Synonym		TRO
Mammillaria ernestii Fittkau	Synonym		TRO
Mammillaria erythra Repp.	Unresolved		WCSP (in review)
Mammillaria erythrocalix Buchenau	Unresolved		WCSP (in review)
Mammillaria erythrosperma Boed.	Accepted		TRO
Mammillaria eschanzieri (Coult.) R.T.Craig	Unresolved		WCSP (in review)
Mammillaria eschauzieri (J.M. Coult.) R.T. Craig	Synonym		TRO
Mammillaria eschauzieri (J.M. Coult.) R.T. Craig bis	Synonym		TRO
Mammillaria escobaria Cory	Unresolved		WCSP (in review)
Mammillaria esperanzaensis Boed.	Synonym		TRO
Mammillaria esseriana Boed.	Synonym		TRO
Mammillaria estanzuelensis H. Möller ex A. Berger	Synonym		TRO
Mammillaria estebanensis G.E. Linds.	Synonym		TRO
Mammillaria euacantha Backeb.	Unresolved		WCSP (in review)
Mammillaria euchlora Ehrenb.	Synonym		TRO
Mammillaria eugenia Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria evanescens C.F.Först.	Unresolved		WCSP (in review)
Mammillaria evermanniana (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria eximia Ehrenb.	Synonym		TRO
Mammillaria exsudans Zucc.	Synonym		TRO
Mammillaria falcata C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria falsicrucigera Backeb.	Unresolved		WCSP (in review)
Mammillaria farinosa Fennel	Unresolved		WCSP (in review)
Mammillaria fasciculata Engelm. ex S. Watson	Synonym		TRO
Mammillaria felicis Schreier ex W. Haage	Synonym		TRO
Mammillaria felipensis Repp.	Unresolved		WCSP (in review)
Mammillaria fellneri Ehrenb.	Synonym		TRO
Mammillaria fennelii Hopffer	Unresolved		WCSP (in review)
Mammillaria fera-rubra Schmoll ex R.T. Craig	Synonym		TRO
Mammillaria fertilis Hildm. ex K. Schum.	Synonym		TRO
Mammillaria fischeri Pfeiff.	Synonym		TRO
Mammillaria fissurata Engelm.	Synonym		TRO
Mammillaria fittkaui Glass & R.C. Foster	Accepted		TRO
Mammillaria fittkaui subsp. limonensis (Repp.) Lüthy	Accepted		TRO
Mammillaria flava Otto & A.Dietr.	Unresolved		WCSP (in review)
Mammillaria flavescens (DC.) DC.	Synonym		TRO
Mammillaria flavescens (DC.) Pfeiff.	Accepted		TRO
Mammillaria flavescens var. nivosa (Link ex Pfeiff.) Backeb.	Accepted		TRO
Mammillaria flavicentra Backeb.	Synonym		TRO
Mammillaria flaviceps Scheidw. ex Labour.	Unresolved		WCSP (in review)
Mammillaria flavicoma C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria flavihamata Backeb.	Unresolved		WCSP (in review)
Mammillaria flavovirens Salm-Dyck	Synonym		TRO
Mammillaria floccigera Otto ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria floresii Fritz Schwarz	Unresolved		WCSP (in review)
Mammillaria floribunda Hook	Synonym		TRO
Mammillaria fobeana Boed.	Unresolved		WCSP (in review)
Mammillaria foersteri Muehlenpf.	Synonym		TRO
Mammillaria fordii Orcutt	Synonym		TRO
Mammillaria formosa Galeotti ex Scheidw.	Accepted		TRO
Mammillaria formosa subsp. chionocephala (J.A. Purpus) D.R. Hunt	Synonym		TRO
Mammillaria formosa subsp. microthele (Muehlenpf.) D.R. Hunt	Accepted		TRO
Mammillaria formosa subsp. pseudocrucigera (R.T. Craig) D.R. Hunt	Synonym		TRO
Mammillaria fortispina Shurly	Unresolved		WCSP (in review)
Mammillaria foveolata Muehlenpf.	Synonym		TRO
Mammillaria fragilis Salm-Dyck	Synonym		TRO
Mammillaria fraileana (Britton & Rose) Boed.	Synonym		TRO
Mammillaria freudenbergeri Repp.	Unresolved		WCSP (in review)
Mammillaria freudenbergii Repp.	Unresolved		WCSP (in review)
Mammillaria fuauxiana Backeb.	Unresolved		WCSP (in review)
Mammillaria fuliginosa Salm-Dyck	Synonym		WCSP (in review)
Mammillaria fulvispina Haw.	Synonym		TRO
Mammillaria funckii Scheidw.	Synonym		TRO
Mammillaria furfuracea Watson	Synonym		TRO
Mammillaria fuscata Pfeiff.	Synonym		TRO
Mammillaria fuscohamata Backeb. ex Repp.	Synonym		TRO
Mammillaria gabbii Engelm. ex J.M. Coult.	Synonym		TRO
Mammillaria × gajii Chvastek & Halda	Unresolved		WCSP (in review)
Mammillaria galeottii Scheidw.	Synonym		TRO
Mammillaria garessii Cowper	Synonym		TRO
Mammillaria gasseriana Boed.	Synonym		TRO
Mammillaria gasterantha Repp.	Unresolved		WCSP (in review)
Mammillaria gatesii M.E. Jones	Synonym		TRO
Mammillaria gaumeri (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria geberweileriana Haage	Unresolved		TRO
Mammillaria gebweileriana J.N.Haage ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria geminata Scheidw.	Synonym		TRO
Mammillaria geminispina Haw.	Accepted		TRO
Mammillaria geminispina subsp. geminispina	Accepted		TRO
Mammillaria geminispina subsp. leucocentra (O. Berg) D.R. Hunt	Accepted		TRO
Mammillaria gibbosa Salm-Dyck	Synonym		TRO
Mammillaria gigantea Hildm. ex K. Schum.	Accepted		TRO
Mammillaria gigantothele C.F.Först.	Unresolved		WCSP (in review)
Mammillaria giselae Mart.-Aval. & Glass	Synonym		TRO
Mammillaria glabrata Salm-Dyck	Synonym		TRO
Mammillaria gladiata Mart.	Synonym		TRO
Mammillaria gladiispina Boed.	Synonym		TRO
Mammillaria glanduligera Otto & A. Dietr.	Synonym		TRO
Mammillaria glareosa Boed.	Synonym		TRO
Mammillaria glassii R.A. Foster	Accepted		TRO
Mammillaria glassii subsp. ascensionis (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria glassii var. ascensionis (Repp.) Glass & R.A. Foster	Synonym		TRO
Mammillaria glassii subsp. nominis-dulcis (A.B. Lau) U. Guzmán	Accepted		TRO
Mammillaria glassii var. nominis-dulcis A.B. Lau	Synonym		TRO
Mammillaria glassii subsp. siberiensis (A.B. Lau) U. Guzmán	Accepted		TRO
Mammillaria glassii var. siberiensis A.B. Lau	Synonym		TRO
Mammillaria glauca A. Dietr. ex Linke	Synonym		TRO
Mammillaria globosa Linke	Unresolved		WCSP (in review)
Mammillaria glochidiata Mart.	Accepted		WCSP (in review)
Mammillaria glomerata DC.	Unresolved		WCSP (in review)
Mammillaria goldii Glass & R.A. Foster	Synonym		TRO
Mammillaria golziana Haage	Unresolved		TRO
Mammillaria goodrichii Engelm.	Synonym		TRO
Mammillaria goodrichii var. rectispina E.Y. Dawson	Synonym		TRO
Mammillaria goodridgii Scheer	Accepted		TRO
Mammillaria goodridgii var. rectispina Dawson	Synonym		TRO
Mammillaria gracilis Pfeiff.	Accepted		TRO
Mammillaria gracilis var. pulchella Salm-Dyck	Synonym		TRO
Mammillaria graessneriana Boed.	Synonym		TRO
Mammillaria grahamii Engelm.	Accepted		TRO
Mammillaria grahamii var. oliviae (Orcutt) L.D. Benson	Synonym		TRO
Mammillaria grandicornis Muehlenpf.	Synonym		TRO
Mammillaria grandiflora Otto ex Pfeiff.	Synonym		TRO
Mammillaria grandis Hitchen ex J.Forbes	Unresolved		WCSP (in review)
Mammillaria granulata Meinsh.	Synonym		TRO
Mammillaria greggii (Engelm.) Saff.	Synonym		TRO
Mammillaria grisea Salm-Dyck	Synonym		TRO
Mammillaria grusonii Runge	Accepted		TRO
Mammillaria guanajuatensis Rudge ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria gueldemanniana Backeb.	Unresolved		WCSP (in review)
Mammillaria guelzowiana Werderm.	Accepted		TRO
Mammillaria guerkeana Boed.	Synonym		TRO
Mammillaria guerreronis (Bravo) Boed.	Accepted		TRO
Mammillaria guiengolensis Bravo & T.MacDoug.	Unresolved		WCSP (in review)
Mammillaria guillauminiana Backeb.	Accepted		WCSP (in review)
Mammillaria guilleminiana Lem.	Synonym		TRO
Mammillaria guirocobensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria gummifera Engelm.	Synonym		TRO
Mammillaria gummifera var. applanata (Engelm.) L.D. Benson	Synonym		TRO
Mammillaria gummifera var. hemisphaerica (Engelm.) L.D. Benson	Synonym		TRO
Mammillaria gummifera var. macdougalii (Rose) L.D. Benson	Synonym		TRO
Mammillaria gummifera var. meiacantha (Engelm.) L.D. Benson	Synonym		TRO
Mammillaria haageana Pfeiff.	Accepted		TRO
Mammillaria haageana subsp. acultzingensis (T. Linzen et al.) D.R. Hunt	Accepted		TRO
Mammillaria haageana var. collina (J.A. Purpus) T. Linzen et al	Synonym		TRO
Mammillaria haageana subsp. conspicua (J.A. Purpus) D.R. Hunt	Accepted		TRO
Mammillaria haageana subsp. elegans D.R. Hunt	Accepted		TRO
Mammillaria haageana subsp. haageana	Accepted		TRO
Mammillaria haageana subsp. meissneri (Ehrenb.) U. Guzmán	Accepted		TRO
Mammillaria haageana subsp. san-angelensis (Sánchez-Mej.) D.R. Hunt	Accepted		TRO
Mammillaria haageana subsp. schmollii (Werderm.) D.R. Hunt	Synonym		TRO
Mammillaria haageana var. schmollii (R.T. Craig bis) D.R. Hunt	Synonym		TRO
Mammillaria haageana subsp. vaupelii (Tiegel) U. Guzmán	Accepted		TRO
Mammillaria haasii J. Meyrán	Synonym		TRO
Mammillaria haehneliana Boed.	Unresolved		WCSP (in review)
Mammillaria haematactina Ehrenb.	Synonym		TRO
Mammillaria hahniana Werderm.	Accepted		TRO
Mammillaria hahniana subsp. bravoae (R.T. Craig) D.R. Hunt	Accepted		TRO
Mammillaria hahniana subsp. mendeliana (Bravo) D.R. Hunt	Accepted		TRO
Mammillaria hahniana subsp. woodsii (R.T. Craig) D.R. Hunt	Accepted		TRO
Mammillaria halbingeri Boed.	Unresolved		WCSP (in review)
Mammillaria halei Brandegee	Synonym		TRO
Mammillaria halhingeri Boed.	Unresolved		TRO
Mammillaria hamata Lehm.	Accepted		TRO
Mammillaria hamiltonhoytiae (Bravo) Werderm.	Unresolved		WCSP (in review)
Mammillaria hamuligera Boed.	Unresolved		WCSP (in review)
Mammillaria haselaffii Ehrenb.	Unresolved		WCSP (in review)
Mammillaria hasseloffii Ehrenb. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria hastifera Krainz & A.Keller	Unresolved		WCSP (in review)
Mammillaria haudeana A.B. Lau & K. Wagner	Synonym		TRO
Mammillaria haynii Ehrenb.	Unresolved		WCSP (in review)
Mammillaria heeseana McDowell	Unresolved		WCSP (in review)
Mammillaria heidiae Krainz	Accepted		TRO
Mammillaria heinei Ehrenb.	Synonym		TRO
Mammillaria helicteres DC.	Unresolved		WCSP (in review)
Mammillaria hemisphaerica Engelm.	Synonym		TRO
Mammillaria hennisii Boed.	Synonym		WCSP (in review)
Mammillaria hepatica Ehrenb.	Unresolved		WCSP (in review)
Mammillaria hernandezii Glass & R.C. Foster	Accepted		TRO
Mammillaria herrerae Werderm.	Accepted		TRO
Mammillaria herrerae var. albiflora Werderm.	Unresolved		WCSP (in review)
Mammillaria herrmannii Ehrenb.	Unresolved		WCSP (in review)
Mammillaria hertrichiana R.T. Craig	Accepted		TRO
Mammillaria heteracantha Mart. ex Pfeiff.	Unresolved		WCSP (in review)
Mammillaria heteracentra Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria heteromorpha Scheer	Synonym		TRO
Mammillaria hexacantha Salm-Dyck	Synonym		TRO
Mammillaria hexacentra Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria heyderi Muehlenpf.	Accepted		TRO
Mammillaria heyderi var. applanata (Engelm.) Engelm.	Synonym		TRO
Mammillaria heyderi var. bullingtoniana Castetter, P. Pierce & K.H. Schwer.	Synonym		TRO
Mammillaria heyderi subsp. gaumeri (Britton & Rose) D.R. Hunt	Synonym		TRO
Mammillaria heyderi subsp. gummifera (Engelm.) D.R. Hunt	Accepted		TRO
Mammillaria heyderi subsp. hemisphaerica (Engelm.) D.R. Hunt	Accepted		TRO
Mammillaria heyderi var. hemisphaerica Engelm.	Synonym		TRO
Mammillaria heyderi subsp. heyderi	Accepted		TRO
Mammillaria heyderi subsp. macdougalii (Rose) D.R. Hunt	Accepted		TRO
Mammillaria heyderi var. macdougalii (Rose) L.D. Benson	Synonym		TRO
Mammillaria heyderi subsp. meiacantha (Engelm.) D.R. Hunt	Accepted		TRO
Mammillaria heyderi var. meiacantha (Engelm.) L.D. Benson	Synonym		TRO
Mammillaria hidalgensis Purpus	Synonym		TRO
Mammillaria hirschtiana F.Haage	Unresolved		WCSP (in review)
Mammillaria hirsuta Boed.	Synonym		TRO
Mammillaria hirsuta var. grandis Repp.	Synonym		TRO
Mammillaria hoffmannseggii Hoffmanns.	Unresolved		WCSP (in review)
Mammillaria hoolii Linds.	Unresolved		TRO
Mammillaria hopferiana Linke	Unresolved		WCSP (in review)
Mammillaria horripila Lem.	Synonym		TRO
Mammillaria huajuapensis Bravo	Synonym		TRO
Mammillaria hubertmulleri Repp.	Unresolved		WCSP (in review)
Mammillaria huiguerensis Repp.	Unresolved		WCSP (in review)
Mammillaria huitzilopochtli D.R. Hunt	Accepted		TRO
Mammillaria huitzilopochtli var. niduliformis A.B. Lau	Synonym		TRO
Mammillaria huitzilopochtli subsp. niduliformis (A.B. Lau) Pilbeam	Accepted		TRO
Mammillaria humboldtii Ehrenb.	Accepted		TRO
Mammillaria humilior C.F.Först. ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria hutchisoniana (H.E. Gates) Boed.	Accepted		TRO
Mammillaria hutchisoniana var. bullardiana (H.E. Gates) Repp.	Synonym		TRO
Mammillaria hutchisoniana subsp. hutchisoniana	Accepted		TRO
Mammillaria hutchisoniana subsp. louisae (G.E. Linds.) D.R. Hunt	Accepted		TRO
Mammillaria hyatricina Lawr.	Unresolved		WCSP (in review)
Mammillaria hybrida Pfeiff.	Unresolved		WCSP (in review)
Mammillaria hystrix Mart.	Synonym		TRO
Mammillaria icamolensis Boed.	Unresolved		WCSP (in review)
Mammillaria ignota Repp.	Synonym		TRO
Mammillaria igualensis Repp.	Unresolved		WCSP (in review)
Mammillaria imbricata Wegener	Unresolved		WCSP (in review)
Mammillaria implexicoma Lem.	Synonym		TRO
Mammillaria inaiae Craig	Synonym		TRO
Mammillaria incerta Parish	Synonym		TRO
Mammillaria inclinis Lem.	Synonym		TRO
Mammillaria inconspicua Scheidw.	Unresolved		WCSP (in review)
Mammillaria incurva Scheidw.	Synonym		TRO
Mammillaria infernillensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria ingens Backeb.	Unresolved		WCSP (in review)
Mammillaria insularis H.E. Gates	Accepted		TRO
Mammillaria intertexta DC.	Synonym		TRO
Mammillaria intricata Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria irregularis DC.	Synonym		TRO
Mammillaria isabellina Ehrenb.	Synonym		TRO
Mammillaria isotensis Repp.	Unresolved		WCSP (in review)
Mammillaria jalappensis Pfeiff.	Unresolved		WCSP (in review)
Mammillaria jaliscana (Britton & Rose) Boed.	Accepted		TRO
Mammillaria jaliscana subsp. zacatecasensis (Shurly) D.R. Hunt	Synonym		TRO
Mammillaria johnstonii (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria joossensiana Quehl	Unresolved		WCSP (in review)
Mammillaria jozef-bergeri Wojn. & Prajer	Synonym		TRO
Mammillaria jucunda Ehrenb.	Synonym		TRO
Mammillaria karstenii Poselg.	Unresolved		WCSP (in review)
Mammillaria karwinskiana Mart.	Accepted		TRO
Mammillaria karwinskiana subsp. beiselii (Diers) D.R. Hunt	Accepted		TRO
Mammillaria karwinskiana subsp. collinsii (Britton & Rose) D.R. Hunt	Synonym		TRO
Mammillaria karwinskiana subsp. karwinskiana	Accepted		TRO
Mammillaria karwinskiana subsp. nejapensis (R.T. Craig & E.Y. Dawson) D.R. Hunt	Accepted		TRO
Mammillaria karwinskii Lawr.	Unresolved		WCSP (in review)
Mammillaria kelleriana Schmoll	Unresolved		WCSP (in review)
Mammillaria kewensis Salm-Dyck	Synonym		TRO
Mammillaria kleinii Regel	Synonym		TRO
Mammillaria kleiniorum Appenz.	Unresolved		WCSP (in review)
Mammillaria kleinschmidtiana Zeiss.	Unresolved		WCSP (in review)
Mammillaria klissingiana Boed.	Accepted		TRO
Mammillaria klugii Ehrenb.	Synonym		TRO
Mammillaria knebeliana Boed.	Unresolved		WCSP (in review)
Mammillaria knipelliana Quehl	Unresolved		WCSP (in review)
Mammillaria knippeliana Quehl	Accepted		TRO
Mammillaria kraehenbuehlii (Krainz) Krainz	Accepted		TRO
Mammillaria krameri Muehlenpf.	Synonym		TRO
Mammillaria krasuckae Repp.	Unresolved		WCSP (in review)
Mammillaria krauseana K.Schum.	Unresolved		WCSP (in review)
Mammillaria kuentziana P.Fearn & B.Fearn	Unresolved		WCSP (in review)
Mammillaria kunthii Ehrenb.	Synonym		TRO
Mammillaria kunzeana Boed. & Quehl	Synonym		TRO
Mammillaria kupcakii Halda & Sladk.	Unresolved		WCSP (in review)
Mammillaria lactescens Meinsh.	Synonym		TRO
Mammillaria laeta Meinsh. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria lamprochaeta Jacobi	Unresolved		WCSP (in review)
Mammillaria lanata Orcutt	Accepted		TRO
Mammillaria laneusumma R.T.Craig	Unresolved		WCSP (in review)
Mammillaria lanifera Haw.	Synonym		TRO
Mammillaria lanigera Repp.	Unresolved		WCSP (in review)
Mammillaria lasiacantha Engelm.	Accepted		TRO
Mammillaria lasiacantha var. denudata Engelm.	Synonym		TRO
Mammillaria lasiacantha subsp. egregia (Backeb. ex Rogoz. & Appenz.) D.R. Hunt	Accepted		TRO
Mammillaria lasiacantha subsp. hyalina D.R. Hunt	Accepted		TRO
Mammillaria lasiacantha subsp. lasiacantha	Accepted		TRO
Mammillaria lasiacantha subsp. magallanii (Schmoll ex R.T. Craig) D.R. Hunt	Synonym		TRO
Mammillaria lassonneriei Rebut ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria latimamma DC.	Synonym		TRO
Mammillaria latispina (Haw.) Tate	Unresolved		WCSP (in review)
Mammillaria laui D.R. Hunt	Accepted		TRO
Mammillaria laui f. dasyacantha D.R. Hunt	Synonym		TRO
Mammillaria laui subsp. dasyacantha (D.R. Hunt) D.R. Hunt	Accepted		TRO
Mammillaria laui f. subducta D.R. Hunt	Synonym		TRO
Mammillaria laui subsp. subducta (D.R. Hunt) D.R. Hunt	Accepted		TRO
Mammillaria lehmannii Otto	Synonym		TRO
Mammillaria leidiae Krainz	Unresolved		WCSP (in review)
Mammillaria lengdobleriana Boed.	Unresolved		WCSP (in review)
Mammillaria lenta K. Brandegee	Accepted		TRO
Mammillaria leona Poselger	Synonym		TRO
Mammillaria leptacantha (A.B.Lau) Repp.	Unresolved		WCSP (in review)
Mammillaria lesaunieri Rebut ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria leucacantha DC.	Unresolved		WCSP (in review)
Mammillaria leucantha Boed.	Synonym		TRO
Mammillaria leucocarpa Scheidw. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria leucocentra O. Berg	Synonym		TRO
Mammillaria leucocephala Pfeiff.	Unresolved		WCSP (in review)
Mammillaria leucocephala Schmoll ex Backeb.	Unresolved		WCSP (in review)
Mammillaria leucodasys Salm-Dyck ex Scheer	Unresolved		WCSP (in review)
Mammillaria leucodictia Link	Synonym		TRO
Mammillaria leucotricha Scheidw.	Synonym		TRO
Mammillaria lewinii (Henn.) H.Karst.	Unresolved		WCSP (in review)
Mammillaria lewisiana H.E. Gates	Synonym		TRO
Mammillaria limonensis Repp.	Synonym		TRO
Mammillaria linaresensis R. Wolf & F. Wolf	Synonym		TRO
Mammillaria lindheimeri Engelm. ex Hemsl.	Unresolved		WCSP (in review)
Mammillaria lindsayi R.T. Craig	Accepted		TRO
Mammillaria lindsayi var. cobrensis Repp.	Synonym		TRO
Mammillaria lindsayi var. rubriflora Hils.	Synonym		TRO
Mammillaria linkeana Ehrenb.	Synonym		TRO
Mammillaria littoralis K. Brandegee	Synonym		TRO
Mammillaria livida Fennel in Otto & A. Dietr.	Synonym		TRO
Mammillaria lloydii (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria longicoma (Britton & Rose) A. Berger	Accepted		TRO
Mammillaria longiflora (Britton & Rose) A. Berger	Accepted		TRO
Mammillaria longiflora subsp. longiflora	Accepted		TRO
Mammillaria longiflora subsp. stampferi (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria longiflora f. stampferi (Repp.) D.R. Hunt	Synonym		TRO
Mammillaria longihamata Engelm.	Unresolved		TRO
Mammillaria longimamma DC.	Accepted		TRO
Mammillaria longimamma var. sphaerica (A. Dietr.) L.D. Benson	Synonym		TRO
Mammillaria longiseta Muehlenpf.	Synonym		TRO
Mammillaria longispina Rchb. ex Terscheck	Unresolved		WCSP (in review)
Mammillaria loricata Mart. ex Pfeiff.	Synonym		TRO
Mammillaria louisae G.E. Linds.	Synonym		TRO
Mammillaria ludwigii Ehrenb.	Synonym		TRO
Mammillaria luethyi G.S. Hinton	Accepted		TRO
Mammillaria lutescens J.Forbes	Unresolved		WCSP (in review)
Mammillaria luthieniae Laferr.	Unresolved		WCSP (in review)
Mammillaria macdougalii Rose	Synonym		TRO
Mammillaria macdowellii K.Schum.	Unresolved		WCSP (in review)
Mammillaria machucae W.A.Fitz Maur. & B.Fitz Maur.	Unresolved		WCSP (in review)
Mammillaria macracantha DC.	Synonym		TRO
Mammillaria macrantha Salm-Dyck ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria macromeris Engelm.	Synonym		TRO
Mammillaria macrothele Mart.	Synonym		TRO
Mammillaria maelenii Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria magallanii Schmoll ex R.T. Craig	Accepted		TRO
Mammillaria magneticola J. Meyrán	Synonym		TRO
Mammillaria magnifica F.G. Buchenau	Accepted		TRO
Mammillaria magnimamma Haw.	Accepted		TRO
Mammillaria magnimamma var. arietina (Lem.) Salm-Dyck	Accepted		TRO
Mammillaria mainiae K. Brandegee	Accepted		TRO
Mammillaria maletiana Cels	Unresolved		WCSP (in review)
Mammillaria mamillaria Scheeren	Unresolved		TRO
Mammillaria mammillaris (L.) H.Karst.	Accepted		WCSP (in review)
Mammillaria manana W.A.Fitz Maur. & B.Fitz Maur.	Unresolved		WCSP (in review)
Mammillaria marcosii Fitz Maurice, B. Fitz Maurice & Glass	Synonym		TRO
Mammillaria maritima (G.E. Linds.) D.R. Hunt	Synonym		TRO
Mammillaria marksiana Krainz	Accepted		TRO
Mammillaria marnieriana Backeb.	Unresolved		WCSP (in review)
Mammillaria marshalliana (H.E.Gates) Boed.	Unresolved		WCSP (in review)
Mammillaria martiana Pfeiff.	Synonym		TRO
Mammillaria martinezii Backeb.	Unresolved		WCSP (in review)
Mammillaria maschalacantha Monv.	Synonym		TRO
Mammillaria mathildae Kraehenb. & Krainz	Accepted		TRO
Mammillaria matudae Bravo	Accepted		TRO
Mammillaria mayensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria mazatlanensis K. Schum.	Accepted		TRO
Mammillaria mazatlanensis subsp. mazatlanensis	Accepted		TRO
Mammillaria mazatlanensis var. monocentra Craig	Synonym		TRO
Mammillaria mazatlanensis subsp. patonii (Bravo) D.R. Hunt	Accepted		TRO
Mammillaria megacantha Salm-Dyck	Synonym		TRO
Mammillaria meiacantha Engelm.	Synonym		TRO
Mammillaria meissneri Ehrenb.	Synonym		TRO
Mammillaria melaleuca Karw. ex Salm-Dyck	Accepted		TRO
Mammillaria melanacantha C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria melanocentra Poselger	Accepted		TRO
Mammillaria melanocentra subsp. linaresensis (R. Wolf & F. Wolf) D.R. Hunt	Accepted		TRO
Mammillaria melanocentra subsp. melanocentra	Accepted		TRO
Mammillaria melanocentra subsp. rubrograndis (Repp. & A.B. Lau) D.R. Hunt	Accepted		TRO
Mammillaria melilotiae Laferr.	Unresolved		WCSP (in review)
Mammillaria melispina Werderm.	Unresolved		WCSP (in review)
Mammillaria mendeliana (Bravo) Werderm.	Unresolved		WCSP (in review)
Mammillaria mercadensis Patoni	Accepted		TRO
Mammillaria mercadensis var. guillauminiana (Backeb.) Repp.	Synonym		TRO
Mammillaria meridiorosei Castetter, P. Pierce & K.H. Schwer.	Synonym		TRO
Mammillaria mexicensis R.T. Craig bis	Synonym		TRO
Mammillaria meyranii Bravo	Accepted		TRO
Mammillaria micans A. Dietr.	Synonym		TRO
Mammillaria micracantha Miq.	Synonym		TRO
Mammillaria micrantha C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria microcarpa Engelm.	Synonym		TRO
Mammillaria microcarpa var. auricarpa W.T. Marshall	Synonym		TRO
Mammillaria microcarpa subsp. grahamii (Engelm.) Mottram	Synonym		TRO
Mammillaria microceras Lem.	Synonym		TRO
Mammillaria microhelia Werderm.	Accepted		TRO
Mammillaria microheliopsis Werderm.	Synonym		TRO
Mammillaria micromeris Engelm.	Synonym		TRO
Mammillaria micromeris var. greggii Engelm.	Synonym		TRO
Mammillaria micromeris var. unguispina Boed.	Unresolved		WCSP (in review)
Mammillaria microthele Muehlenpf.	Synonym		TRO
Mammillaria miegiana W. Earle	Accepted		TRO
Mammillaria mieheana Tiegel	Accepted		TRO
Mammillaria milleri (Britton & Rose) Boed.	Synonym		TRO
Mammillaria milleri f. oliviae (Orcutt) Neutel.	Unresolved		TRO
Mammillaria minima Rchb.	Synonym		TRO
Mammillaria miqueliana Pfeiff. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria mirabilis Ehrenb.	Synonym		TRO
Mammillaria missouriensis Sweet	Synonym		TRO
Mammillaria missouriensis var. caespitosa (Engelm.) S. Watson	Unresolved		TRO
Mammillaria missouriensis var. robustior (Engelm.) S. Watson	Synonym		TRO
Mammillaria mitis Mill.	Synonym		TRO
Mammillaria mitlensis Bravo	Synonym		TRO
Mammillaria moeller-valdeziana Appenz.	Synonym		TRO
Mammillaria moelleriana Boed.	Accepted		TRO
Mammillaria mollendorffiana Shurly	Synonym		TRO
Mammillaria mollihamata Shurly	Unresolved		WCSP (in review)
Mammillaria monancistracantha Backeb.	Unresolved		WCSP (in review)
Mammillaria monancistria A.Berger ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria monancistria Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria monocentra Jacobi	Unresolved		WCSP (in review)
Mammillaria montensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria monticola Repp.	Unresolved		WCSP (in review)
Mammillaria morganiana Tiegel	Synonym		TRO
Mammillaria morricalii Cowper	Synonym		TRO
Mammillaria movensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria mucronata Ehrenb.	Synonym		TRO
Mammillaria muehlenpfordtii Foerster	Synonym		TRO
Mammillaria multicentralis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria multiceps Salm-Dyck	Synonym		TRO
Mammillaria multiceps var. elongata Meinsh.	Synonym		TRO
Mammillaria multiceps var. grisea Meinsh.	Synonym		TRO
Mammillaria multiceps var. humilis Meinsh.	Synonym		TRO
Mammillaria multiceps var. perpusilla Meinsh.	Synonym		TRO
Mammillaria multidigitata W.T. Marshall ex Linds.	Accepted		TRO
Mammillaria multiformis (Britton & Rose) Backeb.	Unresolved		WCSP (in review)
Mammillaria multihamata Boed.	Accepted		TRO
Mammillaria multimamma F.M.Knuth	Unresolved		WCSP (in review)
Mammillaria multiseta Ehrenb.	Synonym		TRO
Mammillaria mundtii K. Schum.	Synonym		TRO
Mammillaria mutabilis Scheidw.	Synonym		TRO
Mammillaria mutica Salm-Dyck ex Hemsl.	Unresolved		TRO
Mammillaria muultiradiata Mart.	Unresolved		WCSP (in review)
Mammillaria mystax Mart.	Accepted		TRO
Mammillaria nagliana Repp.	Unresolved		WCSP (in review)
Mammillaria nana Backeb.	Accepted		TRO
Mammillaria napina J.A. Purpus	Accepted		TRO
Mammillaria nazasensis (Glass & R.A.Foster) Repp.	Unresolved		WCSP (in review)
Mammillaria neglecta Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria nejapensis R.T. Craig & E.Y. Dawson	Synonym		TRO
Mammillaria nellieae (Croizat) Croizat	Synonym		TRO
Mammillaria nelsonii (Britton & Rose) Boed.	Unresolved		WCSP (in review)
Mammillaria neobertrandiana Backeb.	Unresolved		WCSP (in review)
Mammillaria neocoronaria F.M.Knuth	Unresolved		WCSP (in review)
Mammillaria neocrucigera Backeb.	Unresolved		WCSP (in review)
Mammillaria neomexicana A. Nelson ex Coult. & A. Nelson	Synonym		TRO
Mammillaria neomystax Backeb.	Unresolved		WCSP (in review)
Mammillaria neopalmeri R.T. Craig	Accepted		TRO
Mammillaria neophaeacantha Fritz Schwarz	Unresolved		WCSP (in review)
Mammillaria neopotosina R.T.Craig	Unresolved		WCSP (in review)
Mammillaria neoschwarzeana Fritz Schwarz	Unresolved		WCSP (in review)
Mammillaria neumanniana Lem.	Synonym		TRO
Mammillaria neumannii Regel ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria nicholsonii auct.	Unresolved		WCSP (in review)
Mammillaria nickelsiae K. Brandegee	Synonym		TRO
Mammillaria nigra Ehrenb.	Synonym		TRO
Mammillaria nigricans Fennel in Otto & A. Dietr.	Synonym		TRO
Mammillaria nitens Otto ex Linke	Synonym		TRO
Mammillaria nitida Scheidw.	Synonym		TRO
Mammillaria nivea H. Wendl.	Synonym		TRO
Mammillaria nivosa Link ex Pfeiff.	Synonym		TRO
Mammillaria nobilis Pfeiff.	Synonym		TRO
Mammillaria nolascana Radley	Unresolved		WCSP (in review)
Mammillaria notesteinii Britton	Synonym		TRO
Mammillaria noureddineana Repp.	Unresolved		WCSP (in review)
Mammillaria nuda DC.	Unresolved		WCSP (in review)
Mammillaria nunezii (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria nunezii subsp. bella (Backeb.) D.R. Hunt	Accepted		TRO
Mammillaria nunezii subsp. nunezii	Accepted		TRO
Mammillaria nuttallii Engelm.	Unresolved		WCSP (in review)
Mammillaria nuttallii var. caespitosa Engelm.	Synonym		TRO
Mammillaria nuttallii var. robustior (Engelm.) Engelm. & Bigelow	Synonym		TRO
Mammillaria obconella Scheidw.	Synonym		TRO
Mammillaria obliqua Ehrenb.	Synonym		TRO
Mammillaria obscura Hildm.	Synonym		TRO
Mammillaria obvallata Otto	Synonym		TRO
Mammillaria ocamponis Ochot.	Synonym		TRO
Mammillaria occidentalis Boed.	Synonym		TRO
Mammillaria ochoterenae (Bravo) Werderm. ex Backeb.	Synonym		TRO
Mammillaria ocotillensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria octacantha DC.	Synonym		TRO
Mammillaria odehnalii Halda, Kupcák & Sladk.	Unresolved		WCSP (in review)
Mammillaria odieriana Lem.	Synonym		TRO
Mammillaria oettingenii Zeiss.	Unresolved		WCSP (in review)
Mammillaria olivacea Pfeiff.	Unresolved		WCSP (in review)
Mammillaria oliviae Orcutt	Synonym		TRO
Mammillaria olorina Ehrenb.	Synonym		TRO
Mammillaria oothele Lem.	Synonym		TRO
Mammillaria orcuttii Boed.	Accepted		TRO
Mammillaria orestera L.D. Benson	Synonym		TRO
Mammillaria ortegae (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria ortiz-rubiana (Bravo) Werderm. ex Backeb.	Synonym		TRO
Mammillaria oteroi Glass & R. Foster	Accepted		TRO
Mammillaria ottonis Pfeiff.	Synonym		TRO
Mammillaria ovimamma Lem.	Synonym		TRO
Mammillaria pachycylindrica Backeb.	Accepted		TRO
Mammillaria pachyrhiza Backeb.	Synonym		TRO
Mammillaria pachytele Poselg.	Unresolved		WCSP (in review)
Mammillaria pachythele Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria pacifica (H.E.Gates) Boed.	Unresolved		WCSP (in review)
Mammillaria painteri Rose	Synonym		TRO
Mammillaria pallescens Scheidw.	Synonym		TRO
Mammillaria palmeri Jacobi	Synonym		TRO
Mammillaria palmeri (J.M. Coult.) Jacobi	Synonym		TRO
Mammillaria papasquiarensis (Bravo ex S.Arias Montes, U. Guzman Cruz & S. Gama Lopez) Repp.	Synonym		TRO
Mammillaria papyracantha Engelm.	Synonym		TRO
Mammillaria parensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria parkinsonii Ehrenb.	Accepted		TRO
Mammillaria parmentieri Link & Otto	Unresolved		WCSP (in review)
Mammillaria parrasensis Repp.	Unresolved		WCSP (in review)
Mammillaria parvimamma Haw.	Synonym		TRO
Mammillaria parvissima Karw. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria patonii (Bravo) Werderm.	Unresolved		WCSP (in review)
Mammillaria paulii Linzen	Unresolved		WCSP (in review)
Mammillaria pazzani Stieber	Synonym		TRO
Mammillaria peacockii C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria pectinata Engelm.	Synonym		TRO
Mammillaria pectinifera F.A.C. Weber	Accepted		TRO
Mammillaria pectinifera f. solisioides (Backeb.) Sánchez-Mej.	Synonym		TRO
Mammillaria peninsularis (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria pennispinosa Krainz	Accepted		TRO
Mammillaria pennispinosa subsp. brachytrichion (Lüthy) U. Guzmán	Accepted		TRO
Mammillaria pennispinosa var. nazasensis Glass & R. Foster	Synonym		TRO
Mammillaria pennispinosa subsp. nazasensis (Glass & R. Foster) D.R. Hunt	Accepted		TRO
Mammillaria pennispinosa subsp. pennispinosa	Accepted		TRO
Mammillaria pentacantha Pfeiff.	Synonym		TRO
Mammillaria perbella Hildm. ex K. Schum.	Accepted		TRO
Mammillaria perezdelarosae Bravo & Scheinvar	Accepted		TRO
Mammillaria perezdelarosae subsp. perezdelarosae	Accepted		TRO
Mammillaria perote Pfeiff.	Unresolved		WCSP (in review)
Mammillaria perpusilla Meinsh. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria perringii Hildm. ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria persicina Ehrenb.	Synonym		TRO
Mammillaria pertinata Engelm.	Unresolved		TRO
Mammillaria petrophila K. Brandegee	Accepted		TRO
Mammillaria petrophila subsp. arida (Rose ex Quehl) D.R. Hunt	Accepted		TRO
Mammillaria petrophila subsp. baxteriana (H.E. Gates) D.R. Hunt	Accepted		TRO
Mammillaria petrophila subsp. petrophila	Accepted		TRO
Mammillaria petterssonii Hildm.	Accepted		TRO
Mammillaria pfeifferi Booth ex Scheidw.	Unresolved		WCSP (in review)
Mammillaria pfeifferiana de Vriese	Synonym		TRO
Mammillaria phaeacantha Lem.	Synonym		TRO
Mammillaria phaeotricha Monv. ex Labour.	Synonym		TRO
Mammillaria phantasma Sotom.	Synonym		TRO
Mammillaria phellosperma Engelm.	Synonym		TRO
Mammillaria phitauiana (E.M. Baxter) Werderm.	Synonym		TRO
Mammillaria phymatothele A. Berger	Synonym		TRO
Mammillaria picta Meinsh.	Accepted		TRO
Mammillaria picta subsp. viereckii (Boed.) D.R. Hunt	Accepted		TRO
Mammillaria picturata Labour.	Unresolved		WCSP (in review)
Mammillaria pilcayensis Bravo	Synonym		TRO
Mammillaria pilispina J.A. Purpus	Accepted		TRO
Mammillaria pitcayensis Bravo	Unresolved		WCSP (in review)
Mammillaria plaschnickii Otto	Synonym		TRO
Mammillaria plecostigma Meinsh.	Synonym		TRO
Mammillaria pleiocephala Regel & Klein	Synonym		TRO
Mammillaria plinthimorpha Jacobi	Unresolved		WCSP (in review)
Mammillaria plumosa F.A.C. Weber	Accepted		TRO
Mammillaria polyacantha Ehrenb.	Synonym		TRO
Mammillaria polyactina Ehrenb.	Unresolved		WCSP (in review)
Mammillaria polycentra A. Berger	Synonym		TRO
Mammillaria polycephala Muehlenpf.	Synonym		TRO
Mammillaria polychlora Scheidw. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria polyedra Mart.	Accepted		TRO
Mammillaria polygona Salm-Dyck	Synonym		TRO
Mammillaria polymorpha Scheer ex Muehlenpf.	Synonym		TRO
Mammillaria polythele Mart.	Accepted		TRO
Mammillaria polythele var. aciculata (Otto ex Pfeiff.) Salm-Dyck	Synonym		TRO
Mammillaria polythele subsp. durispina (Boed.) D.R. Hunt	Accepted		TRO
Mammillaria polythele subsp. obconella (Scheidw.) D.R. Hunt	Accepted		TRO
Mammillaria polythele subsp. polythele	Accepted		TRO
Mammillaria polythele var. quadrispina (Mart.) Salm-Dyck	Synonym		TRO
Mammillaria polythele var. setosa (Pfeiff.) Salm-Dyck	Synonym		TRO
Mammillaria polytricha Salm-Dyck	Synonym		TRO
Mammillaria pomacea Ehrenb.	Synonym		TRO
Mammillaria pondii Greene	Synonym		TRO
Mammillaria pondii subsp. maritima (G.E. Linds.) D.R. Hunt	Synonym		TRO
Mammillaria pondii subsp. setispina (J.M. Coult.) D.R. Hunt	Synonym		TRO
Mammillaria porphyracantha Jacobi	Unresolved		WCSP (in review)
Mammillaria poselgeri Hildm.	Synonym		TRO
Mammillaria poselgeriana J.N.Haage ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria posseltiana Boed.	Unresolved		WCSP (in review)
Mammillaria potosiana Jacobi	Synonym		TRO
Mammillaria pottsii Scheer ex Salm-Dyck	Accepted		TRO
Mammillaria praelii Muehlenpf.	Synonym		TRO
Mammillaria pretiosa Ehrenb.	Synonym		TRO
Mammillaria priessnitzii Repp.	Unresolved		WCSP (in review)
Mammillaria pringlei (J.M. Coult.) K. Brandegee	Synonym		TRO
Mammillaria prismatica (Lem.) Hemsl.	Synonym		TRO
Mammillaria procera Ehrenb.	Synonym		TRO
Mammillaria prolifera (Mill.) Haw.	Accepted		TRO
Mammillaria prolifera subsp. arachnoidea (D.R. Hunt) D.R. Hunt	Accepted		TRO
Mammillaria prolifera var. arachnoidea D.R. Hunt	Synonym		TRO
Mammillaria prolifera subsp. haitiensis (K. Schum.) D.R. Hunt	Accepted		TRO
Mammillaria prolifera subsp. multiceps (Salm-Dyck) U. Guzmán	Accepted		TRO
Mammillaria prolifera var. multiceps (Salm-Dyck) Borg	Synonym		TRO
Mammillaria prolifera subsp. texana (Engelm.) D.R. Hunt	Synonym		TRO
Mammillaria prolifera var. texana (Engelm.) Borg	Synonym		TRO
Mammillaria prolifera subsp. zublerae (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria pruinosa Ehrenb.	Unresolved		WCSP (in review)
Mammillaria psendofuscata Quehl	Unresolved		WCSP (in review)
Mammillaria pseudoalamensis Backeb.	Unresolved		WCSP (in review)
Mammillaria pseudocrucigera R.T. Craig	Accepted		TRO
Mammillaria pseudofuscata Quehl	Unresolved		WCSP (in review)
Mammillaria pseudomamillaris Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria pseudopectinata (Backeb.) H.P.Kelsey & Dayton	Unresolved		WCSP (in review)
Mammillaria pseudoperbella Quehl	Synonym		TRO
Mammillaria pseudorekoi (Rose) Boed.	Unresolved		WCSP (in review)
Mammillaria pseudoscrippsiana Backeb.	Synonym		TRO
Mammillaria pseudosimplex W.Haage & Backeb.	Unresolved		WCSP (in review)
Mammillaria puberula Repp.	Unresolved		WCSP (in review)
Mammillaria pubispina Boed.	Unresolved		WCSP (in review)
Mammillaria pugionacantha Foerster	Synonym		TRO
Mammillaria pulchella Salm-Dyck	Synonym		TRO
Mammillaria pulcherrima Ehrenb.	Synonym		TRO
Mammillaria pulchra Haw.	Synonym		TRO
Mammillaria pullihamata Repp.	Unresolved		WCSP (in review)
Mammillaria pullihamata Backeb.	Unresolved		WCSP (in review)
Mammillaria pulvilligera Monv. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria punctata Labour. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria purpuracea S.Watson	Unresolved		WCSP (in review)
Mammillaria purpurascens Ehrenb.	Unresolved		WCSP (in review)
Mammillaria purpurea Ehrenb.	Synonym		TRO
Mammillaria purpusii K.Schum.	Unresolved		WCSP (in review)
Mammillaria pusilla DC.	Synonym		TRO
Mammillaria pusilla var. haitiensis K. Schum.	Synonym		TRO
Mammillaria pusilla var. texana Engelm.	Synonym		TRO
Mammillaria pycnacantha Mart.	Synonym		TRO
Mammillaria pygmaea	Synonym		TRO
Mammillaria pyramidalis Link & Otto	Unresolved		WCSP (in review)
Mammillaria pyrrhacantha Pfeiff. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria pyrrhocentra Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria pyrrhocephala Scheidw.	Synonym		TRO
Mammillaria pyrrhochracantha Lem.	Synonym		TRO
Mammillaria quadrata G.Don ex Loudon	Unresolved		WCSP (in review)
Mammillaria quadrispina Mart.	Synonym		TRO
Mammillaria queretarica R.T.Craig	Unresolved		WCSP (in review)
Mammillaria radiaissima Linds.	Synonym		TRO
Mammillaria radians DC.	Synonym		TRO
Mammillaria radians var. echinus (Engelm.) K. Schum.	Synonym		TRO
Mammillaria radians var. sulcata (Engelm.) K. Schum.	Synonym		TRO
Mammillaria radicantissima Quehl	Synonym		TRO
Mammillaria radiosa Engelm.	Synonym		TRO
Mammillaria radiosa K. Schum.	Synonym		TRO
Mammillaria radiosa var. alversonii (J.M. Coult.) K. Schum.	Synonym		TRO
Mammillaria radiosa var. arizonica (Engelm.) K. Schum.	Synonym		TRO
Mammillaria radiosa var. deserti (Engelm.) K. Schum.	Synonym		TRO
Mammillaria radiosa var. vivipara (Nutt.) Schelle	Synonym		TRO
Mammillaria radleana K.Schum.	Unresolved		WCSP (in review)
Mammillaria radliana Quehl	Unresolved		WCSP (in review)
Mammillaria radula Scheidw. ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria ramosissima Quehl	Unresolved		WCSP (in review)
Mammillaria raphidacantha var. ancistracantha (Lem.) K. Schum.	Synonym		TRO
Mammillaria rayonensis Repp.	Synonym		TRO
Mammillaria rayonesensis Repp.	Unresolved		WCSP (in review)
Mammillaria rectispina (E.Y. Dawson) Repp.	Synonym		TRO
Mammillaria recurva Lehm.	Synonym		TRO
Mammillaria recurvata Engelm.	Synonym		TRO
Mammillaria recurvispina de Vriese	Synonym		TRO
Mammillaria recurvispina Engelm.	Synonym		TRO
Mammillaria regia Ehrenb.	Synonym		TRO
Mammillaria rekoi Vaupel	Accepted		TRO
Mammillaria rekoi subsp. aureispina (A.B. Lau) D.R. Hunt	Accepted		TRO
Mammillaria rekoi var. aureispina A.B. Lau	Synonym		TRO
Mammillaria rekoi var. leptacantha A.B. Lau	Synonym		TRO
Mammillaria rekoi subsp. leptacantha (A.B. Lau) D.R. Hunt	Accepted		TRO
Mammillaria rekoi subsp. rekoi	Accepted		TRO
Mammillaria rekoiana R.T.Craig	Unresolved		WCSP (in review)
Mammillaria reppenhagenii D.R. Hunt	Synonym		TRO
Mammillaria rettigiana Boed.	Accepted		TRO
Mammillaria retusa Pfeiff.	Synonym		TRO
Mammillaria rhaphidacantha Lem.	Synonym		TRO
Mammillaria rhodacantha Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria rhodantha Link & Otto	Accepted		TRO
Mammillaria rhodantha subsp. aureiceps (Lem.) D.R. Hunt	Accepted		TRO
Mammillaria rhodantha var. droegeana K.Schum.	Unresolved		WCSP (in review)
Mammillaria rhodantha subsp. fera-rubra (Schmoll ex R.T. Craig) D.R. Hunt	Accepted		TRO
Mammillaria rhodantha subsp. mccartenii D.R. Hunt	Accepted		TRO
Mammillaria rhodantha subsp. mollendorffiana (Shurly) D.R. Hunt	Accepted		TRO
Mammillaria rhodantha subsp. pringlei (J.M. Coult.) D.R. Hunt	Accepted		TRO
Mammillaria rhodantha subsp. rhodantha	Accepted		TRO
Mammillaria rhodeocentra Lem.	Synonym		TRO
Mammillaria rigidispina Hildm. ex Quehl	Unresolved		WCSP (in review)
Mammillaria rioverdense Repp.	Unresolved		WCSP (in review)
Mammillaria rioverdensis Repp.	Unresolved		WCSP (in review)
Mammillaria ritteriana Boed.	Synonym		TRO
Mammillaria ritteriana var. quadricentralis R.T. Craig bis	Synonym		TRO
Mammillaria robusta Otto ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria robustispina Schott ex Engelm.	Synonym		TRO
Mammillaria roemeri Wolfg.Krüger & W.Rischer	Unresolved		WCSP (in review)
Mammillaria rosea Scheidw.	Synonym		TRO
Mammillaria roseana Brandegee	Synonym		TRO
Mammillaria rosensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria roseoalba Boed.	Accepted		TRO
Mammillaria roseoalha Boed.	Unresolved		WCSP (in review)
Mammillaria roseocentra Boed. & Ritter	Unresolved		WCSP (in review)
Mammillaria rossiana Heinr.	Unresolved		WCSP (in review)
Mammillaria rubida Fritz Schwarz	Unresolved		WCSP (in review)
Mammillaria rubidula Ehrenb.	Synonym		TRO
Mammillaria rubrograndis Repp. & A.B. Lau	Synonym		TRO
Mammillaria rueschiana Regel	Synonym		TRO
Mammillaria ruestii Quehl	Synonym		TRO
Mammillaria ruficeps Lem.	Synonym		TRO
Mammillaria rufidula Ehrenb.	Unresolved		WCSP (in review)
Mammillaria rufocrocea Salm-Dyck	Synonym		TRO
Mammillaria runyonii (Britton & Rose) Cory	Synonym		TRO
Mammillaria russea A.Dietr.	Unresolved		WCSP (in review)
Mammillaria rutila Zucc. ex Pfeiff.	Synonym		TRO
Mammillaria saboae Glass	Accepted		TRO
Mammillaria saboae subsp. goldii (Glass & R.A. Foster) D.R. Hunt	Accepted		TRO
Mammillaria saboae subsp. haudeana (A.B. Lau & K. Wagner) D.R. Hunt	Accepted		TRO
Mammillaria saboae f. haudeana (A.B. Lau & K. Wagner) D.R. Hunt	Synonym		TRO
Mammillaria saetigera Boed. & Tiegel	Unresolved		WCSP (in review)
Mammillaria saffordii (Britton & Rose) Bravo	Unresolved		WCSP (in review)
Mammillaria saint-pieana Backeb.	Unresolved		WCSP (in review)
Mammillaria salm-dyckiana Scheer	Synonym		TRO
Mammillaria salm-dyckiana var. brunnea Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria salmiana Fennel ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria saltillensis Boed.	Unresolved		WCSP (in review)
Mammillaria sanangelensis Sánchez-Mej.	Synonym		TRO
Mammillaria sanchez-mejoradae R. Gonzalez G.	Accepted		TRO
Mammillaria sanjuanensis Repp.	Unresolved		WCSP (in review)
Mammillaria sanluisensis Shurly	Unresolved		WCSP (in review)
Mammillaria santaclarensis Cowper	Synonym		TRO
Mammillaria sartorii J.A.Purpus	Accepted		WCSP (in review)
Mammillaria saxatilis Scheer	Synonym		TRO
Mammillaria saxicola Repp.	Unresolved		WCSP (in review)
Mammillaria scepontocentra Lem.	Synonym		TRO
Mammillaria schaeferi Fennel in Otto & A. Dietr.	Synonym		TRO
Mammillaria scheeri Muehlenpf.	Synonym		TRO
Mammillaria scheeri var. valida Engelm.	Synonym		TRO
Mammillaria scheidweileriana Otto	Synonym		TRO
Mammillaria scheinvariana R. Ortega & Glass in Glass	Synonym		TRO
Mammillaria schelhasei Pfeiff.	Synonym		TRO
Mammillaria schelhasii var. aurihamata (Boed.) Repp.	Synonym		TRO
Mammillaria schiedeana Ehrenb. ex Schltdl.	Accepted		TRO
Mammillaria schiedeana subsp. dumetorum (J.A. Purpus) D.R. Hunt	Accepted		TRO
Mammillaria schiedeana subsp. giselae Lüthy	Accepted		TRO
Mammillaria schieliana H.Schick	Unresolved		WCSP (in review)
Mammillaria schlechtendalii Ehrenb.	Synonym		TRO
Mammillaria schmerwitzii J.N.Haage ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria schmidtii Sencke ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria schmollii Werderm.	Synonym		TRO
Mammillaria schumannii Hildm.	Accepted		TRO
Mammillaria schwarzii Shurly	Accepted		TRO
Mammillaria scolymoides Scheidw.	Synonym		TRO
Mammillaria scrippsiana (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria seegeri Ehrenb.	Unresolved		WCSP (in review)
Mammillaria seemannii Scheer	Synonym		TRO
Mammillaria seideliana Quehl	Synonym		TRO
Mammillaria seidelii Terscheck	Synonym		TRO
Mammillaria seitziana Mart.	Synonym		TRO
Mammillaria sempervivi DC.	Accepted		TRO
Mammillaria senckeana K.Schum.	Unresolved		WCSP (in review)
Mammillaria senckei Horkel ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria senilis Lodd. ex Salm-Dyck	Accepted		TRO
Mammillaria senilis var. diguetii Weber	Synonym		TRO
Mammillaria senkii C.F.Först. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria senkii C.F.Först.	Unresolved		WCSP (in review)
Mammillaria sericata Lem.	Unresolved		WCSP (in review)
Mammillaria setispina Engelm. ex J.M. Coult.	Synonym		TRO
Mammillaria setosa Pfeiff.	Synonym		TRO
Mammillaria severini Regel & Klein	Synonym		TRO
Mammillaria sheldonii (Britton & Rose) Boed.	Accepted		TRO
Mammillaria shurliana H.E.Gates	Unresolved		WCSP (in review)
Mammillaria silvatica Repp.	Unresolved		WCSP (in review)
Mammillaria similis Engelm.	Synonym		TRO
Mammillaria similis var. caespitosa Engelm.	Synonym		TRO
Mammillaria similis var. robustior Engelm.	Synonym		TRO
Mammillaria simplex Haw.	Synonym		WCSP (in review)
Mammillaria simplex Torr. & A. Gray	Synonym		TRO
Mammillaria simplex var. flavescens (DC.) K. Schum.	Synonym		TRO
Mammillaria simpsonii (Engelm.) M.E. Jones	Synonym		TRO
Mammillaria sinforosensis Linzen & R.Schumach.	Unresolved		WCSP (in review)
Mammillaria sinistrohamata Boed.	Accepted		TRO
Mammillaria slevinii (Britton & Rose) Boed.	Unresolved		WCSP (in review)
Mammillaria sneedii (Britton & Rose) Cory	Synonym		TRO
Mammillaria soehlemannii W.Haage & Backeb.	Unresolved		WCSP (in review)
Mammillaria solisii (Britton & Rose) Boed.	Unresolved		WCSP (in review)
Mammillaria solisioides Backeb.	Accepted		TRO
Mammillaria solitaria G.Don ex Loudon	Unresolved		WCSP (in review)
Mammillaria sonorensis R.T. Craig	Synonym		TRO
Mammillaria sororia Meinsh.	Synonym		TRO
Mammillaria spaethiana Späth	Unresolved		WCSP (in review)
Mammillaria speciosa de Vriese	Synonym		TRO
Mammillaria spectabilis Muehlenpf.	Synonym		TRO
Mammillaria sphacelata Mart.	Accepted		TRO
Mammillaria sphacelata subsp. viperina (J.A. Purpus) D.R. Hunt	Accepted		TRO
Mammillaria sphaerica A. Dietr. ex Engelm.	Unresolved		TRO
Mammillaria sphaerica A. Dietr.	Accepted		TRO
Mammillaria sphaerotricha Lem.	Synonym		TRO
Mammillaria spinaurea Salm-Dyck	Synonym		TRO
Mammillaria spinii Colla ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria spinosa G.Don ex Loudon	Unresolved		WCSP (in review)
Mammillaria spinosissima Lem.	Accepted		TRO
Mammillaria spinosissima subsp. pilcayensis (Bravo) D.R. Hunt	Accepted		TRO
Mammillaria spinosissima subsp. spinosissima	Accepted		TRO
Mammillaria spinosissima subsp. tepoxtlana D.R. Hunt	Accepted		TRO
Mammillaria splendens Ehrenb.	Unresolved		WCSP (in review)
Mammillaria squarrosa Meinsh.	Synonym		TRO
Mammillaria stampferi Repp.	Synonym		TRO
Mammillaria standleyi (Britton & Rose) Orcutt	Accepted		TRO
Mammillaria staurotypa C.F.Först.	Unresolved		WCSP (in review)
Mammillaria stella-aurata Mart. ex Zucc.	Synonym		TRO
Mammillaria stella-de-tacubaya Heese	Accepted		TRO
Mammillaria stellaris Haw.	Unresolved		WCSP (in review)
Mammillaria stellata Haw.	Synonym		TRO
Mammillaria stenocephala Scheidw. ex Labour.	Synonym		TRO
Mammillaria stipitata Scheidw.	Synonym		TRO
Mammillaria straminea Haw.	Unresolved		WCSP (in review)
Mammillaria strobiliformis Engelm.	Synonym		TRO
Mammillaria strobiliformis var. durispina Quehl	Synonym		TRO
Mammillaria strobiliformis var. rufispina Quehl	Synonym		TRO
Mammillaria strobilina Tiegel	Unresolved		WCSP (in review)
Mammillaria stueberi Otto	Synonym		TRO
Mammillaria suaveolens C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria subangularis DC.	Synonym		TRO
Mammillaria subcirrhifera C.F.Först.	Unresolved		WCSP (in review)
Mammillaria subcrocea DC.	Synonym		TRO
Mammillaria subcurvata Dieter.	Synonym		TRO
Mammillaria subducta (D.R.Hunt) Repp.	Unresolved		WCSP (in review)
Mammillaria subdurispina Fritz Schwarz	Unresolved		WCSP (in review)
Mammillaria subechinata Salm-Dyck	Synonym		TRO
Mammillaria subpolyedra Salm-Dyck	Synonym		TRO
Mammillaria subtetragona A. Dietr.	Synonym		TRO
Mammillaria subtilis Backeb.	Unresolved		WCSP (in review)
Mammillaria subulata Muehlenpf.	Unresolved		WCSP (in review)
Mammillaria subulifera Ehrenb.	Synonym		TRO
Mammillaria sulcata Engelm.	Synonym		TRO
Mammillaria sulcimamma Pfeiff. ex Salm-Dyck	Unresolved		WCSP (in review)
Mammillaria sulcoglandulifera Jacobi	Unresolved		WCSP (in review)
Mammillaria sulcolanata Lem.	Synonym		TRO
Mammillaria sulphurea C.F.Först.	Unresolved		WCSP (in review)
Mammillaria supertexta Mart. ex Pfeiff.	Accepted		TRO
Mammillaria supraflumen Repp.	Unresolved		WCSP (in review)
Mammillaria surculosa Boed.	Accepted		TRO
Mammillaria swinglei (Britton & Rose) Boed.	Synonym		TRO
Mammillaria tacubayensis Fedde	Synonym		TRO
Mammillaria tamayonis Killip ex Schnee	Synonym		WCSP (in review)
Mammillaria tayloriorum Glass & R.A. Foster	Accepted		TRO
Mammillaria tecta Miq.	Synonym		TRO
Mammillaria tegelbergiana H.E. Gates ex G.E. Linds.	Synonym		TRO
Mammillaria tenampensis (Britton & Rose) A.Berger	Unresolved		WCSP (in review)
Mammillaria tentaculata Pfeiff.	Synonym		TRO
Mammillaria tenuis DC.	Synonym		TRO
Mammillaria tepexicensis J. Meyrán	Accepted		TRO
Mammillaria tesopacensis Craig	Synonym		TRO
Mammillaria tesopacensis var. papasquiarensis Bravo ex S.Arias Montes, U. Guzman Cruz & S. Gama Lopez	Synonym		TRO
Mammillaria tetracantha Salm-Dyck	Synonym		TRO
Mammillaria tetracentra hort. ex Salm-Dyck	Synonym		TRO
Mammillaria tetrancistra Engelm.	Accepted		TRO
Mammillaria texana (Engelm.) Young	Synonym		TRO
Mammillaria texensis Labour.	Synonym		TRO
Mammillaria tezontle Fitz Maurice & B. Fitz Maurice	Synonym		TRO
Mammillaria thelocamptos Lehm.	Unresolved		WCSP (in review)
Mammillaria theresae Cutak	Accepted		TRO
Mammillaria thornberi Orcutt	Accepted		TRO
Mammillaria thornberi subsp. thornberi	Accepted		TRO
Mammillaria thornberi subsp. yaquensis (R.T. Craig) D.R. Hunt	Accepted		TRO
Mammillaria tiegeliana Backeb.	Unresolved		WCSP (in review)
Mammillaria tinuvieliae Laferr.	Unresolved		WCSP (in review)
Mammillaria tlalocii Repp.	Synonym		TRO
Mammillaria toaldoae Lehm. ex Walp.	Unresolved		WCSP (in review)
Mammillaria tobuschii W.T. Marshall	Synonym		TRO
Mammillaria tomentosa Ehrenb.	Synonym		TRO
Mammillaria tonalensis D.R. Hunt	Accepted		TRO
Mammillaria tortolensis Pfeiff.	Unresolved		WCSP (in review)
Mammillaria triacantha DC.	Synonym		TRO
Mammillaria trichacantha K. Schum.	Synonym		TRO
Mammillaria trohartii Hildm. ex K.Schum.	Unresolved		WCSP (in review)
Mammillaria tropica Repp.	Unresolved		WCSP (in review)
Mammillaria tuberculata Engelm.	Unresolved		WCSP (in review)
Mammillaria tuberculosa Engelm.	Synonym		TRO
Mammillaria turbinata Hook.	Synonym		TRO
Mammillaria uberiformis Zucc.	Synonym		TRO
Mammillaria uberimamma Monv. ex C.F.Först. & Rümpler	Unresolved		WCSP (in review)
Mammillaria umbrina Ehrenb.	Synonym		TRO
Mammillaria uncinata Zucc. ex Pfeiff.	Accepted		TRO
Mammillaria unihamata Boed.	Unresolved		WCSP (in review)
Mammillaria uniseta K.Schum.	Unresolved		WCSP (in review)
Mammillaria urbaniana Vaupel	Unresolved		WCSP (in review)
Mammillaria vagaspina R.T.Craig	Unresolved		WCSP (in review)
Mammillaria valdeziana (H.Moeller) H.P.Kelsey & Dayton	Unresolved		WCSP (in review)
Mammillaria valida Purpus	Synonym		TRO
Mammillaria valida Weber	Synonym		TRO
Mammillaria vallensis Repp.	Unresolved		WCSP (in review)
Mammillaria variabilis Repp.	Unresolved		WCSP (in review)
Mammillaria variamamma Ehrenb.	Synonym		TRO
Mammillaria varieaculeata Buchenau	Accepted		TRO
Mammillaria vaupelii Tiegel	Synonym		TRO
Mammillaria venusta K. Brandegee	Synonym		TRO
Mammillaria verhaertiana Boed.	Accepted		TRO
Mammillaria versicolor Scheidw.	Synonym		TRO
Mammillaria verticealba Repp.	Synonym		TRO
Mammillaria vetula Mart.	Accepted		TRO
Mammillaria vetula subsp. gracilis (Pfeiff.) D.R. Hunt	Synonym		TRO
Mammillaria vetula subsp. magneticola (J. Meyrán) U. Guzmán	Accepted		TRO
Mammillaria viereckii Boed.	Synonym		TRO
Mammillaria viescensis Rogoz. & Appenz.	Accepted		TRO
Mammillaria villifera Otto	Synonym		TRO
Mammillaria villosa Fennel ex C.F.Först.	Unresolved		WCSP (in review)
Mammillaria viperina J.A. Purpus	Synonym		TRO
Mammillaria virens Scheidw.	Synonym		TRO
Mammillaria virginis Fittkau & Kladiwa	Synonym		TRO
Mammillaria viridiflora (Britton & Rose) Boed.	Accepted		TRO
Mammillaria viridis Salm-Dyck	Synonym		TRO
Mammillaria viridis var. praelii (Muehlenpf.) Salm-Dyck	Synonym		TRO
Mammillaria viridula Ehrenb.	Unresolved		WCSP (in review)
Mammillaria vivipara (Nutt.) Haw.	Synonym		TRO
Mammillaria vivipara var. alversonii (J.M. Coult.) L.D. Benson	Synonym		TRO
Mammillaria vivipara var. radiosa Engelm.	Synonym		TRO
Mammillaria vivipara subsp. radiosa Engelm.	Synonym		TRO
Mammillaria voburnensis Scheer	Accepted		TRO
Mammillaria voburnensis subsp. collinsii (Britton & Rose) U. Guzmán	Accepted		TRO
Mammillaria voburnensis var. collinsii (Britton & Rose) Repp.	Synonym		TRO
Mammillaria voburnensis subsp. eichlamii (Quehl) D.R. Hunt	Accepted		TRO
Mammillaria voburnensis var. eichlamii (Quehl) Repp.	Synonym		TRO
Mammillaria voburnensis var. gerhardii Diers	Synonym		TRO
Mammillaria voburnensis var. quetzalcoatl Repp.	Synonym		TRO
Mammillaria voburnensis subsp. voburnensis	Accepted		TRO
Mammillaria vonwyssiana Krainz	Unresolved		WCSP (in review)
Mammillaria vonwyssii Krainz	Unresolved		WCSP (in review)
Mammillaria vulpina Ehrenb.	Synonym		TRO
Mammillaria wagneriana Boed.	Accepted		TRO
Mammillaria waltheri Boed.	Synonym		TRO
Mammillaria webbiana Lem.	Synonym		TRO
Mammillaria wegenerii Ehrenb.	Synonym		TRO
Mammillaria weingartiana Boed.	Accepted		TRO
Mammillaria werdermanii H.Weiss	Unresolved		WCSP (in review)
Mammillaria wiesingeri Boed.	Accepted		TRO
Mammillaria wiesingeri subsp. apamensis (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria wiesingeri subsp. wiesingeri	Accepted		TRO
Mammillaria wilcoxii Toumey ex K. Schum.	Synonym		TRO
Mammillaria wildiana Otto	Synonym		TRO
Mammillaria wildii A. Dietr.	Synonym		TRO
Mammillaria williamsii Coult.	Unresolved		WCSP (in review)
Mammillaria winkleri Foerster	Synonym		TRO
Mammillaria winterae Boed.	Accepted		TRO
Mammillaria winterae subsp. aramberri D.R. Hunt	Accepted		TRO
Mammillaria wissmannii Hildm. ex K. Schum.	Synonym		TRO
Mammillaria woburnensis Scheer	Synonym		TRO
Mammillaria woburnensis var. collinsii (Britton & Rose) Repp.	Synonym		TRO
Mammillaria woburnensis var. eichlamii (Quehl) Repp.	Synonym		TRO
Mammillaria wohlschlageri Repp.	Synonym		TRO
Mammillaria woodsii R.T. Craig	Synonym		TRO
Mammillaria wrightii Engelm.	Accepted		TRO
Mammillaria wrightii subsp. wilcoxii (Toumey ex K. Schum.) D.R. Hunt	Accepted		TRO
Mammillaria wrightii var. wilcoxii (Toumey ex K. Schum.) W.T. Marshall	Synonym		TRO
Mammillaria wrightii f. wolfii D.R. Hunt	Synonym		TRO
Mammillaria wrightii var. wolfii (D.R. Hunt) Repp.	Synonym		TRO
Mammillaria wrightii subsp. wrightii	Accepted		TRO
Mammillaria wuthenauiana Backeb.	Unresolved		WCSP (in review)
Mammillaria xaltianguensis Sánchez-Mej.	Accepted		TRO
Mammillaria xaltianguensis subsp. bambusiphila (Repp.) D.R. Hunt	Accepted		TRO
Mammillaria xanthina (Britton & Rose) Boed.	Unresolved		WCSP (in review)
Mammillaria xanthotrica Scheidw.	Synonym		TRO
Mammillaria xochipilli Repp.	Unresolved		WCSP (in review)
Mammillaria yaquensis R.T. Craig	Synonym		TRO
Mammillaria yucatanensis (Britton & Rose) Orcutt	Synonym		TRO
Mammillaria zacatecasensis Shurly	Synonym		TRO
Mammillaria zahniana Boed. & Ritter	Unresolved		WCSP (in review)
Mammillaria zanthotricha Scheidw.	Unresolved		TRO
Mammillaria zapilotensis R.T.Craig	Unresolved		WCSP (in review)
Mammillaria zegschwitzii Pfeiff.	Synonym		TRO
Mammillaria zeilmanniana Boed.	Accepted		TRO
Mammillaria zephyranthiflora Pfeiff.	Unresolved		WCSP (in review)
Mammillaria zephyranthoides Scheidw.	Accepted		TRO
Mammillaria zepnickii Ehrenb.	Synonym		TRO
Mammillaria zeyeriana Haage ex K. Schum.	Accepted		TRO
Mammillaria zublerae Repp.	Synonym		TRO
Mammillaria zuccariniana Mart.	Synonym		TRO