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Taxon author: Backeb.

ITIS records citing taxon author "Backeb."
 
 Kingdom Plantae
  Acanthocalycium Backeb. -- not accepted
  Acanthocalycium chionanthum (Speg.) Backeb. -- not accepted
  Acanthocalycium griseum Backeb. -- not accepted
  Acanthocalycium klimpelianum (Weidlich & Werderm.) Backeb. -- not accepted
  Acanthocalycium peitscherianum Backeb. -- not accepted
  Acanthocalycium spiniflorum (K. Schum.) Backeb. -- not accepted
  Acanthocalycium thionanthum (Speg.) Backeb. -- not accepted
  Acanthocalycium variiflorum Backeb. -- not accepted
  Acanthocalycium violaceum (Werderm.) Backeb. -- not accepted
  Acantholobivia Backeb. -- not accepted
  Acantholobivia incuiensis (Rauh & Backeb.) Rauh & Backeb. -- not accepted
  Acantholobivia tegeleriana (Backeb.) Backeb. -- not accepted
  Ancistrocactus tobuschii (W.T. Marshall) Backeb. ex L.D. Benson -- not accepted -- Tobusch fishhook cactus
  Anisocereus Backeb. -- not accepted
  Anisocereus lepidanthus (Eichlam) Backeb. -- not accepted
  Armatocereus Backeb. -- accepted
  Armatocereus arboreus Rauh & Backeb. -- not accepted
  Armatocereus cartwrightianus (Britton & Rose) Backeb. -- accepted
  Armatocereus churinensis Rauh & Backeb. -- not accepted
  Armatocereus godingianus (Britton & Rose) Backeb. -- accepted
  Armatocereus godingianus ssp. godingianus (Britton & Rose) Backeb. -- accepted
  Armatocereus humilis (Britton & Rose) Backeb. -- not accepted
  Armatocereus laetus (Britton & Rose) Backeb. -- accepted
  Armatocereus matucanensis Backeb. -- accepted
  Armatocereus oligogonus Rauh & Backeb. -- not accepted
  Armatocereus procerus Rauh & Backeb. -- accepted
  Armatocereus rauhii Backeb. -- accepted
  Armatocereus rauhii ssp. rauhii Backeb. -- accepted
  Armatocereus riomajensis Rauh & Backeb. -- accepted
  Arthrocereus campos-portoi (Werderm.) Backeb. -- not accepted
  Arthrocereus densiaculeatus (Backeb.) Krainz -- not accepted
  Arthrocereus rondonianus Backeb. & Voll -- accepted
  Austrocactus coxii (K. Schum.) Backeb. -- not accepted
  Austrocactus gracilis Backeb. -- not accepted
  Austrocephalocereus Backeb. -- not accepted
  Austrocylindropuntia Backeb. -- accepted
  Austrocylindropuntia cylindrica (Lam.) Backeb. -- accepted
  Austrocylindropuntia exaltata (A. Berger) Backeb. -- not accepted
  Austrocylindropuntia haematacantha (Backeb.) Backeb. -- not accepted
  Austrocylindropuntia hirschii (Backeb.) E.F. Anderson -- not accepted
  Austrocylindropuntia humahuacana (Backeb.) Backeb. -- not accepted
  Austrocylindropuntia inarmata Backeb. -- not accepted
  Austrocylindropuntia intermedia Rauh & Backeb. -- not accepted
  Austrocylindropuntia pachypus (K. Schum.) Backeb. -- accepted
  Austrocylindropuntia punta-caillan (Rauh & Backeb.) E.F. Anderson -- not accepted
  Austrocylindropuntia shaferi (Britton & Rose) Backeb. -- accepted
  Austrocylindropuntia steiniana Backeb. -- not accepted
  Austrocylindropuntia subulata (Muehlenpf.) Backeb. -- accepted
  Austrocylindropuntia subulata ssp. subulata (Muehlenpf.) Backeb. -- accepted
  Austrocylindropuntia tephrocactoides Rauh & Backeb. -- not accepted
  Austrocylindropuntia teres (Cels ex F.A.C. Weber) Backeb. -- not accepted
  Austrocylindropuntia verschaffeltii (Cels ex F.A.C. Weber) Backeb. -- accepted
  Austrocylindropuntia vestita (Salm-Dyck) Backeb. -- accepted
  Austrocylindropuntia weingartiana (Backeb.) Backeb. -- not accepted
  Austrocylindropuntia yanganucensis (Rauh & Backeb.) E.F. Anderson -- not accepted
  Azureocereus hertlingianus (Backeb.) Backeb. -- not accepted
  Blossfeldia liliputana var. campaniflora (Backeb.) Krainz -- not accepted
  Blossfeldia liliputana var. fechseri (Backeb.) F. Ritter -- not accepted
  Borzicactus aequatorialis Backeb. -- not accepted
  Borzicactus doelzianus (Backeb.) Kimnach -- not accepted
  Borzicactus faustianus Backeb. -- not accepted
  Borzicactus hendriksenianus (Backeb.) Kimnach -- not accepted
  Borzicactus jajoanus Backeb. -- not accepted
  Borzicactus pseudothelegonus (Rauh & Backeb.) Rauh & Backeb. -- not accepted
  Borzicactus sextonianus (Backeb.) Kimnach -- not accepted
  Borzicactus sulcifer (Rauh & Backeb.) Kimnach -- not accepted
  Borzicactus tenuiserpens (Rauh & Backeb.) Kimnach -- not accepted
  Borzicactus variabilis (Rauh & Backeb.) Donald -- not accepted
  Borzicactus websterianus Backeb. -- not accepted
  Borzicactus websterianus var. rufispinus Backeb. -- not accepted
  Brachycalycium Backeb. -- not accepted
  Brachycalycium tilcarense Backeb. -- not accepted
  Brachycereus nesioticus (K. Schum.) Backeb. -- accepted
  Brasilicactus Backeb. -- not accepted
  Brasilicactus elachisanthus (F.A.C. Weber) Backeb. -- not accepted
  Brasilicactus graessneri (K. Schum.) Backeb. -- not accepted
  Brasilicactus haselbergii (F. Haage) Backeb. ex Schaffnit -- not accepted
  Brasilicereus Backeb. -- accepted
  Brasilicereus markgrafii Backeb. & Voll -- accepted
  Brasilicereus phaeacanthus (Gürke) Backeb. -- accepted
  Brasiliopuntia neoargentina Backeb. -- not accepted
  Brasiliopuntia schulzii (A. Cast. & H.V. Lelong) Backeb. -- not accepted
  Browningia amstutziae (Rauh & Backeb.) Hutchison ex Krainz -- accepted
  Browningia hertlingiana (Backeb.) Buxb. -- accepted
  Browningia microsperma (Werderm. & Backeb.) W.T. Marshall -- accepted
  Browningia riosaniensis (Backeb.) G.D. Rowley -- not accepted
  Browningia viridis (Rauh & Backeb.) Buxb. -- not accepted
  Cephalocereus guerreronis (Backeb.) Buxb. -- not accepted
  Cephalocleistocactus pallidus Backeb. -- not accepted
  Cephalocleistocactus ritteri (Backeb.) Backeb. -- not accepted
  Cephalocleistocactus schattatianus Backeb. -- not accepted
  Cereus atroviridis Backeb. -- not accepted
  Cereus campinensis (Backeb. & Voll) P.J. Braun & Esteves -- not accepted
  Cereus fricii Backeb. -- accepted
  Cereus haageanus (Backeb.) N.P. Taylor -- not accepted
  Cereus horrispinus Backeb. -- accepted
  Cereus markgrafii (Backeb. & Voll) P.J. Braun & Esteves -- not accepted
  Cereus microspermus Werderm. & Backeb. -- not accepted
  Cereus neotetragonus Backeb. -- not accepted
  Cereus pseudomelanostele Werderm. & Backeb. -- not accepted
  Cereus ridleii Andrade-Lima ex Backeb. -- not accepted
  Cipocereus bradei (Backeb. & Voll) Barthlott & N.P. Taylor -- accepted
  Cleistocactus acanthurus ssp. faustianus (Backeb.) Ostolaza -- accepted
  Cleistocactus acanthurus ssp. pullatus (Rauh & Backeb.) Ostolaza -- accepted
  Cleistocactus baumannii ssp. santacruzensis (Backeb.) Mottram -- accepted
  Cleistocactus bruneispinus Backeb. -- not accepted
  Cleistocactus buchtienii Backeb. -- accepted
  Cleistocactus clavispinus (Rauh & Backeb.) Ostolaza -- not accepted
  Cleistocactus compactus Backeb. -- not accepted
  Cleistocactus erectispinus (Rauh & Backeb.) Ostolaza -- not accepted
  Cleistocactus flavispinus (K. Schum.) Backeb. -- not accepted
  Cleistocactus granditessellatus (Rauh & Backeb.) Leuenb. -- not accepted
  Cleistocactus grossei Backeb. -- not accepted
  Cleistocactus herzogianus Backeb. -- not accepted
  Cleistocactus hystrix (Rauh & Backeb.) Ostolaza -- accepted
  Cleistocactus jajoanus (Backeb.) G.J. Charles -- accepted
  Cleistocactus jujuyensis (Backeb.) Backeb. -- not accepted
  Cleistocactus morawetzianus Backeb. -- accepted
  Cleistocactus morawetzianus var. pycnacanthus Rauh & Backeb. -- not accepted
  Cleistocactus pachycladus (Rauh & Backeb.) Ostolaza -- accepted
  Cleistocactus peculiaris (Rauh & Backeb.) Ostolaza -- not accepted
  Cleistocactus pojoensis (Cárdenas) Backeb. -- not accepted
  Cleistocactus pycnacanthus (Rauh & Backeb.) Backeb. -- accepted
  Cleistocactus ritteri Backeb. -- accepted
  Cleistocactus roezlii (Haage) Backeb. -- not accepted
  Cleistocactus santacruzensis Backeb. -- not accepted
  Cleistocactus sextonianus (Backeb.) D.R. Hunt -- accepted
  Cleistocactus strausii (Heese) Backeb. -- accepted
  Cleistocactus sulcifer (Rauh & Backeb.) Leuenb. -- accepted
  Cleistocactus tenuiserpens Rauh & Backeb. -- accepted
  Cleistocactus tominensis (Weing.) Backeb. -- accepted
  Cleistocactus tominensis ssp. tominensis (Weing.) Backeb. -- accepted
  Cleistocactus tupizensis (Vaupel) Backeb. -- not accepted
  Cleistocactus viridiflorus Backeb. -- not accepted
  Cleistocactus wendlandiorum Backeb. -- not accepted
  Cleistocactus X crassiserpens Rauh & Backeb. -- not accepted
  Clistanthocereus Backeb. -- not accepted
  Clistanthocereus calviflorus (F. Ritter) Backeb. -- not accepted
  Clistanthocereus fieldianus (Britton & Rose) Backeb. -- not accepted
  Clistanthocereus hertlingianus Backeb. -- not accepted
  Clistanthocereus samnensis (F. Ritter) Backeb. -- not accepted
  Clistanthocereus tessellatus (Akers & Buining) Backeb. -- not accepted
  Coleocephalocereus Backeb. -- accepted
  Coleocephalocereus fluminensis (Miq.) Backeb. -- accepted
  Coleocephalocereus fluminensis ssp. fluminensis (Miq.) Backeb. -- accepted
  Copiapoa bridgesii (Pfeiff.) Backeb. -- not accepted
  Copiapoa cinerea ssp. haseltoniana (Backeb.) N.P. Taylor -- accepted
  Copiapoa cinerea var. gigantea (Backeb.) N.P. Taylor -- not accepted
  Copiapoa cupreata (Poselg. ex Rümpler) Backeb. -- not accepted
  Copiapoa ferox Lembcke & Backeb. -- not accepted
  Copiapoa fiedleriana (K. Schum.) Backeb. -- accepted
  Copiapoa gigantea Backeb. -- not accepted
  Copiapoa haseltoniana Backeb. -- not accepted
  Copiapoa lembckei Backeb. -- not accepted
  Copiapoa malletiana (Lem. ex Salm-Dyck) Backeb. -- not accepted
  Copiapoa pepiniana (Lem. ex Salm-Dyck) Backeb. -- not accepted
  Corryocactus ayacuchoensis Rauh & Backeb. -- accepted
  Corryocactus brevispinus Rauh & Backeb. -- not accepted
  Corryocactus brevistylus ssp. puquiensis (Rauh & Backeb.) Ostolaza -- not accepted
  Corryocactus brevistylus var. puquiensis (Rauh & Backeb.) F. Ritter -- not accepted
  Corryocactus chachapoyensis Ochoa & Backeb. ex D.R. Hunt -- accepted
  Corryocactus erectus (Backeb.) F. Ritter -- accepted
  Corryocactus heteracanthus Backeb. -- not accepted
  Corryocactus krausii Backeb. -- not accepted
  Corryocactus maximus (Backeb.) Hutchison -- not accepted
  Corryocactus pachycladus Rauh & Backeb. -- not accepted
  Corryocactus puquiensis Rauh & Backeb. -- not accepted
  Corryocactus quadrangularis (Rauh & Backeb.) F. Ritter -- accepted
  Corryocactus tenuiculus (Backeb.) Hutchison -- not accepted
  Corynopuntia reflexispina (Wiggins & Rollins) Backeb. -- accepted
  Coryphantha clavata (Scheidw.) Backeb. -- accepted
  Coryphantha clavata ssp. clavata (Scheidw.) Backeb. -- accepted
  Coryphantha maiz-tablasensis Fritz Schwartz ex Backeb. -- accepted
  Coryphantha neoscheeri Backeb. -- not accepted
  Coryphantha pseudonickelsae Backeb. -- accepted
  Coryphantha pulleineana (Backeb.) Glass -- accepted
  Coryphantha villarensis Backeb. -- not accepted
  Coryphantha vivipara var. neomexicana (Engelm.) Backeb. -- not accepted
  Coryphantha vivipara var. radiosa (Engelm.) Backeb. -- not accepted
  Cryptocereus imitans (Kimnach & Hutchison) Backeb. -- not accepted
  Cryptocereus rosei (Kimnach) Backeb. -- not accepted
  Cumulopuntia crassicylindrica (Rauh & Backeb.) F. Ritter ex Eggli -- not accepted
  Cumulopuntia fulvicoma (Rauh & Backeb.) E.F. Anderson -- not accepted
  Cumulopuntia kuehnrichiana (Werderm. & Backeb.) F. Ritter -- not accepted
  Cumulopuntia mistiensis (Backeb.) E.F. Anderson -- not accepted
  Cumulopuntia rossiana (Heinrich & Backeb.) F. Ritter -- accepted
  Cumulopuntia unguispina (Backeb.) F. Ritter -- not accepted
  Cumulopuntia zehnderi (Rauh & Backeb.) F. Ritter -- not accepted
  Cylindropuntia abyssi (Hester) Backeb. -- accepted -- Peach Springs cholla
  Cylindropuntia acanthocarpa var. thornberi (Thornber & Bonker) Backeb. -- accepted
  Cylindropuntia alamosensis (Britton & Rose) Backeb. -- not accepted
  Cylindropuntia brevispina (H.E. Gates) Backeb. -- not accepted
  Cylindropuntia brittonii (J.G. Ortega) Backeb. -- not accepted
  Cylindropuntia burrageana (Britton & Rose) Backeb. -- not accepted
  Cylindropuntia fulgida var. mamillata (A. Schott ex Engelm.) Backeb. -- accepted
  Cylindropuntia haematacantha Backeb. -- not accepted
  Cylindropuntia hualpaensis (Hester) Backeb. -- not accepted
  Cylindropuntia humahuacana Backeb. -- not accepted
  Cylindropuntia imbricata var. argentea (M.S. Anthony) Backeb. -- accepted
  Cylindropuntia intermedia (Rauh & Backeb.) Rauh & Backeb. -- not accepted
  Cylindropuntia metuenda (Pittier) Backeb. -- not accepted
  Cylindropuntia munzii (C.B. Wolf) Backeb. -- accepted
  Cylindropuntia rosarica (G.E. Linds.) Backeb. -- not accepted
  Cylindropuntia rosea (DC.) Backeb. -- accepted
  Cylindropuntia teres (Cels ex F.A.C. Weber) Backeb. -- not accepted
  Cylindropuntia weingartiana (Backeb.) Backeb. -- not accepted
  Cylindropuntia X multigeniculata (Clokey) Backeb. -- accepted
  Cylindropuntia X munzii (C.B. Wolf) Backeb. -- not accepted
  Cylindropuntia X neoarbuscula (Griffiths) Backeb. & F.M. Knuth -- accepted
  Delaetia Backeb. -- not accepted
  Delaetia woutersiana Backeb. -- not accepted
  Discocactus boliviensis Backeb. -- accepted
  Dolichothele albescens (Tiegel) Backeb. -- not accepted
  Dolichothele balsasoides (R.T. Craig) Backeb. -- not accepted
  Dolichothele baumii (Boed.) Backeb. -- not accepted
  Dolichothele beneckei (Ehrenb.) Backeb. -- not accepted
  Dolichothele nelsonii (Britton & Rose) Backeb. -- not accepted
  Dolichothele surculosa (Boed.) Backeb. -- not accepted
  Dolichothele zephyranthoides (Scheidw.) Backeb. -- not accepted
  Echinocactus flavidispinus (Backeb.) D. Weniger -- not accepted
  Echinocereus albatus Backeb. -- not accepted
  Echinocereus baileyi var. albispinus (Lahman) Backeb. -- not accepted
  Echinocereus floresii Backeb. -- not accepted
  Echinocereus roetteri var. lloydii (Britton & Rose) Backeb. -- not accepted
  Echinocereus sciurus ssp. floresii (Backeb.) N.P. Taylor -- accepted
  Echinofossulocactus caespitosus Backeb. -- not accepted
  Echinofossulocactus erectocentrus Backeb. -- not accepted
  Echinofossulocactus guerraianus Backeb. -- not accepted
  Echinomastus intertextus var. dasyacanthus (Engelm.) Backeb. -- not accepted
  Echinomastus mapimiensis Backeb. -- not accepted
  Echinopsis backebergii ssp. wrightiana (Backeb.) M. Lowry -- accepted
  Echinopsis bertramiana (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis breviflora (Backeb.) M. Lowry -- accepted
  Echinopsis cephalomacrostibas (Werderm. & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis chalaensis (Rauh & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis chiloensis ssp. skottsbergii (Backeb. ex Skottsb.) G.J. Charles -- accepted
  Echinopsis cochabambensis Backeb. -- not accepted
  Echinopsis elongata (Backeb.) Friedrich & Glaetzle -- not accepted
  Echinopsis ferox (Britton & Rose) Backeb. -- accepted
  Echinopsis hahniana (Backeb.) R.S. Wallace -- accepted
  Echinopsis hamatacantha Backeb. -- not accepted
  Echinopsis hertrichiana (Backeb.) D.R. Hunt -- accepted
  Echinopsis jajoana (Backeb.) Blos. -- accepted
  Echinopsis knuthiana (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis kratochviliana Backeb. -- not accepted
  Echinopsis nigra Backeb. -- not accepted
  Echinopsis pecheretiana (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis peruviana ssp. puquiensis (Rauh & Backeb.) Ostolaza -- not accepted
  Echinopsis poco (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis polyancistra Backeb. -- not accepted
  Echinopsis puquiensis (Rauh & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis rivierei (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis rubinghiana (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis sanguiniflora (Backeb.) D.R. Hunt -- not accepted
  Echinopsis santaensis (Rauh & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis schieliana (Backeb.) D.R. Hunt -- accepted
  Echinopsis schoenii (Rauh & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis skottsbergii (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis smrziana Backeb. -- not accepted
  Echinopsis stilowiana (Backeb.) Lam. -- accepted
  Echinopsis tarijensis ssp. bertramiana (Backeb.) M. Lowry -- accepted
  Echinopsis tarmaensis (Rauh & Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis tegeleriana (Backeb.) D.R. Hunt -- accepted
  Echinopsis uebelmanniana (Lembcke & Backeb.) A.E. Hoffm. -- not accepted
  Echinopsis uyupampensis (Backeb.) H. Friedrich & G.D. Rowley -- not accepted
  Echinopsis volliana (Backeb.) H. Friedrich & G.D. Rowley -- accepted
  Echinopsis werdermanniana (Backeb.) H. Friedrich & G.D. Rowley -- accepted
  Echinopsis werdermannii (Backeb.) Fric ex Z. Fleisch. -- not accepted
  Epiphyllum macrocarpum (F.A.C. Weber) Backeb. -- not accepted
  Epithelantha micromeris ssp. polycephala (Backeb.) Glass -- not accepted
  Epithelantha micromeris var. polycephala (Backeb.) Glass & R.A. Foster -- not accepted
  Epithelantha pachyrhiza (W.T. Marshall) Backeb. -- not accepted
  Epithelantha polycephala Backeb. -- not accepted
  Erdisia aureispina Backeb. & H. Jacobsen -- not accepted
  Erdisia erecta Backeb. -- not accepted
  Erdisia maxima Backeb. -- not accepted
  Erdisia quadrangularis Rauh & Backeb. -- not accepted
  Erdisia sextoniana Backeb. -- not accepted
  Erdisia tenuicula Backeb. -- not accepted
  Eriocactus Backeb. -- not accepted
  Eriocactus leninghausii Backeb. ex Schaffnit -- not accepted
  Eriocactus schumannianus (Nicolai) Backeb. -- not accepted
  Eriosyce aurata (Pfeiff.) Backeb. -- accepted
  Eriosyce heinrichiana (Backeb.) Katt. -- accepted
  Eriosyce heinrichiana ssp. heinrichiana (Backeb.) Katt. -- not accepted
  Eriosyce islayensis ssp. grandis (Rauh & Backeb.) G.J. Charles -- accepted
  Eriosyce napina ssp. lembckei (Backeb.) Katt. -- accepted
  Eriosyce senilis (Backeb.) Katt. -- accepted
  Eriosyce senilis ssp. senilis (Backeb.) Katt. -- accepted
  Escobaria duncanii (Hester) Backeb. -- accepted
  Escobaria nellieae (Croizat) Backeb. -- not accepted
  Escobaria zilziana (Boed.) Backeb. -- accepted
  Espostoa laticornua Rauh & Backeb. -- not accepted
  Espostoa procera Rauh & Backeb. -- not accepted
  Eulychnia procumbens Backeb. -- not accepted
  Ferocactus pottsii (Salm-Dyck) Backeb. -- accepted
  Ferocactus tiburonensis (G.E. Linds.) Backeb. -- accepted
  Frailea alacriportana Backeb. & Voll -- not accepted
  Frailea carminifilamentosa Kilian ex Backeb. -- not accepted
  Frailea castanea Backeb. -- accepted
  Frailea castanea ssp. castanea Backeb. -- not accepted
  Frailea pullispina Backeb. -- not accepted
  Frailea uhligiana Backeb. -- not accepted
  Glandulicactus Backeb. -- not accepted
  Glandulicactus crassihamatus (F.A.C. Weber) Backeb. -- not accepted
  Glandulicactus uncinatus (Galeotti ex Pfeiff.) Backeb. -- not accepted
  Glandulicactus uncinatus ssp. uncinatus (Galeotti ex Pfeiff.) Backeb. -- not accepted
  Glandulicactus uncinatus var. wrightii (Engelm.) Backeb. -- not accepted
  Gymnanthocereus Backeb. -- not accepted
  Gymnocactus Backeb. -- not accepted
  Gymnocactus beguinii (F.A.C. Weber ex K. Schum.) Backeb. -- not accepted
  Gymnocalycium albispinum Backeb. -- not accepted
  Gymnocalycium andreae (Boed.) Backeb. -- accepted
  Gymnocalycium andreae ssp. andreae (Boed.) Backeb. -- not accepted
  Gymnocalycium bodenbenderianum ssp. intertextum (Backeb. ex H. Till) H. Till -- not accepted
  Gymnocalycium castellanosii Backeb. -- accepted
  Gymnocalycium castellanosii ssp. castellanosii Backeb. -- accepted
  Gymnocalycium castellanosii ssp. ferocior (Backeb. ex H. Till & Amerh.) G.J. Charles -- accepted
  Gymnocalycium ferox (Backeb.) Slaba -- not accepted
  Gymnocalycium grandiflorum Backeb. -- not accepted
  Gymnocalycium hammerschmidii Backeb. -- not accepted
  Gymnocalycium hybopleurum (K. Schum.) Backeb. -- not accepted
  Gymnocalycium intertextum Backeb. -- not accepted
  Gymnocalycium mazanense (Backeb.) Backeb. -- not accepted
  Gymnocalycium mostii ssp. ferocius Backeb. ex H. Till & Amerh. -- not accepted
  Gymnocalycium neumannianum (Backeb.) Hutchison -- not accepted
  Gymnocalycium nidulans Backeb. -- not accepted
  Gymnocalycium nigriareolatum Backeb. -- accepted
  Gymnocalycium ochoterenae Backeb. -- accepted
  Gymnocalycium ochoterenae ssp. ochoterenae Backeb. -- not accepted
  Gymnocalycium oenanthemum Backeb. -- accepted
  Gymnocalycium proliferum (Backeb.) Backeb. -- not accepted
  Gymnocalycium pseudomalacocarpus Backeb. -- not accepted
  Gymnocalycium pugionacanthum Backeb. ex H. Till -- accepted
  Gymnocalycium riojense ssp. paucispinum Backeb. ex H. Till & W. Till -- not accepted
  Gymnocalycium saglionis ssp. tilcarense (Backeb.) H. Till & W. Till -- not accepted
  Gymnocalycium tilcarense (Backeb.) H. Till & W. Till -- not accepted
  Gymnocalycium weissianum Backeb. -- not accepted
  Gymnocereus Backeb. -- not accepted
  Gymnocereus amstutziae Rauh & Backeb. -- not accepted
  Gymnocereus microspermus (Werderm. & Backeb.) Backeb. -- not accepted
  Haageocereus Backeb. -- accepted
  Haageocereus acanthocladus Rauh & Backeb. -- not accepted
  Haageocereus achaetus Rauh & Backeb. -- not accepted
  Haageocereus acranthus (Vaupel) Backeb. -- accepted
  Haageocereus acranthus ssp. acranthus (Vaupel) Backeb. -- accepted
  Haageocereus acranthus ssp. olowinskianus (Backeb.) Ostolaza -- accepted
  Haageocereus akersii Backeb. -- not accepted
  Haageocereus albispinus (Akers) Backeb. -- not accepted
  Haageocereus ambiguus Rauh & Backeb. -- not accepted
  Haageocereus aureispinus Rauh & Backeb. -- not accepted
  Haageocereus australis Backeb. -- not accepted
  Haageocereus cephalomacrostibas (Backeb.) P.V. Heath -- not accepted
  Haageocereus chosicensis (Werderm. & Backeb.) Backeb. -- not accepted
  Haageocereus chrysacanthus (Akers) Backeb. -- not accepted
  Haageocereus clavispinus Rauh & Backeb. -- not accepted
  Haageocereus crassiareolatus Rauh & Backeb. -- not accepted
  Haageocereus decumbens (Vaupel) Backeb. -- accepted
  Haageocereus deflexispinus Rauh & Backeb. -- not accepted
  Haageocereus dichromus Rauh & Backeb. -- not accepted
  Haageocereus divaricatispinus Rauh & Backeb. -- not accepted
  Haageocereus horrens Rauh & Backeb. -- not accepted
  Haageocereus icensis Backeb. ex F. Ritter -- not accepted
  Haageocereus icosagonoides Rauh & Backeb. -- not accepted
  Haageocereus lachayensis Rauh & Backeb. -- not accepted
  Haageocereus laredensis Backeb. -- not accepted
  Haageocereus litoralis Rauh & Backeb. -- not accepted
  Haageocereus longiareolatus Rauh & Backeb. -- not accepted
  Haageocereus mamillatus var. brevior Rauh & Backeb. -- not accepted
  Haageocereus olowinskianus Backeb. -- not accepted
  Haageocereus pacalaensis Backeb. -- accepted
  Haageocereus pachystele Rauh & Backeb. -- not accepted
  Haageocereus paradoxus Rauh & Backeb. -- not accepted
  Haageocereus peniculatus Rauh & Backeb. -- not accepted
  Haageocereus piliger Rauh & Backeb. -- not accepted
  Haageocereus platinospinus (Werderm. & Backeb.) Backeb. -- accepted
  Haageocereus pluriflorus Rauh & Backeb. -- not accepted
  Haageocereus pseudoacranthus Rauh & Backeb. -- not accepted
  Haageocereus pseudomelanostele (Werderm. & Backeb.) Backeb. -- accepted
  Haageocereus pseudomelanostele ssp. acanthocladus (Rauh & Backeb.) Ostolaza -- accepted
  Haageocereus pseudomelanostele ssp. aureispinus (Rauh & Backeb.) Ostolaza -- accepted
  Haageocereus pseudomelanostele ssp. carminiflorus (Rauh & Backeb.) Ostolaza -- not accepted
  Haageocereus pseudomelanostele ssp. pseudomelanostele (Werderm. & Backeb.) Backeb. -- accepted
  Haageocereus pseudomelanostele ssp. turbidus (Rauh & Backeb.) Ostolaza -- accepted
  Haageocereus pseudomelanostele var. carminiflorus Rauh & Backeb. -- not accepted
  Haageocereus pseudoversicolor Rauh & Backeb. -- accepted
  Haageocereus rauhii (Backeb.) P.V. Heath -- not accepted
  Haageocereus repens Rauh & Backeb. -- not accepted
  Haageocereus setosus (Akers) Backeb. -- not accepted
  Haageocereus symmetros Rauh & Backeb. -- not accepted
  Haageocereus tenuispinus Rauh & Backeb. -- not accepted
  Haageocereus turbidus Rauh & Backeb. -- not accepted
  Haageocereus versicolor (Werderm. & Backeb.) Backeb. -- accepted
  Haageocereus zonatus Rauh & Backeb. -- not accepted
  Harrisia divaricata (Lam.) Backeb. -- accepted
  Harrisia hahniana (Backeb.) Kimnach & Hutchison -- not accepted
  Haseltonia Backeb. -- not accepted
  Haseltonia columna-trajani (Karw.) Backeb. -- not accepted
  Heliabravoa Backeb. -- not accepted
  Heliabravoa chende (Rol.-Goss.) Backeb. -- not accepted
  Helianthocereus Backeb. -- not accepted
  Helianthocereus antezanae (Cárdenas) Backeb. -- not accepted
  Helianthocereus atacamensis (Phil.) Backeb. -- not accepted
  Helianthocereus bertramianus (Backeb.) Backeb. -- not accepted
  Helianthocereus conaconensis (Cárdenas) Backeb. -- not accepted
  Helianthocereus crassicaulis Backeb. -- not accepted
  Helianthocereus escayachensis (Cárdenas) Backeb. -- not accepted
  Helianthocereus grandiflorus (Britton & Rose) Backeb. -- not accepted
  Helianthocereus herzogianus (Cárdenas) Backeb. -- not accepted
  Helianthocereus huascha (F.A.C. Weber) Backeb. -- not accepted
  Helianthocereus hyalacanthus (Speg.) Backeb. -- not accepted
  Helianthocereus narvaecensis (Cárdenas) Backeb. -- not accepted
  Helianthocereus orurensis (Cárdenas) Backeb. -- not accepted
  Helianthocereus pasacanus (F.A.C. Weber ex Rümpler) Backeb. -- not accepted
  Helianthocereus pecheretianus var. viridior Backeb. -- not accepted
  Helianthocereus poco (Backeb.) Backeb. -- not accepted
  Helianthocereus pseudocandicans Backeb. -- not accepted
  Helianthocereus randallii (Cárdenas) Backeb. -- not accepted
  Helianthocereus tarijensis (Vaupel) Backeb. -- not accepted
  Hertrichocereus Backeb. -- not accepted
  Hertrichocereus beneckei (Ehrenb.) Backeb. -- not accepted
  Horridocactus Backeb. -- not accepted
  Horridocactus aconcaguensis (F. Ritter) Backeb. -- not accepted
  Horridocactus armatus (F. Ritter) Backeb. -- not accepted
  Horridocactus atroviridis (F. Ritter) Backeb. -- not accepted
  Horridocactus carrizalensis (F. Ritter) Backeb. -- not accepted
  Horridocactus choapensis (F. Ritter) Backeb. -- not accepted
  Horridocactus crispus (F. Ritter) Backeb. -- not accepted
  Horridocactus curvispinus (Bertero ex Colla) Backeb. -- not accepted
  Horridocactus echinus (F. Ritter) Backeb. -- not accepted
  Horridocactus grandiflorus (F. Ritter) Backeb. -- not accepted
  Horridocactus heinrichianus Backeb. -- not accepted
  Horridocactus lissocarpus (F. Ritter) Backeb. -- not accepted
  Horridocactus marksianus (F. Ritter) Backeb. -- not accepted
  Horridocactus nigricans (Dietr. ex K. Schum.) Backeb. & Dölz -- not accepted
  Horridocactus vallenarensis (F. Ritter) Backeb. -- not accepted
  Hylocereus estebanensis Backeb. -- not accepted
  Hylocereus microcladus Backeb. -- not accepted
  Hylocereus peruvianus Backeb. -- not accepted
  Hylocereus scandens (Salm-Dyck) Backeb. -- not accepted
  Hymenorebutia drijveriana (Backeb.) F. Ritter -- not accepted
  Islaya Backeb. -- not accepted
  Islaya brevicylindrica Rauh & Backeb. -- not accepted
  Islaya copiapoides Rauh & Backeb. -- not accepted
  Islaya grandiflorens Rauh & Backeb. -- not accepted
  Islaya grandis Rauh & Backeb. -- not accepted
  Islaya islayensis (C.F. Först.) Backeb. -- not accepted
  Islaya islayensis var. minor (Backeb.) F. Ritter -- not accepted
  Islaya minor Backeb. -- not accepted
  Islaya molendensis (Vaupel) Backeb. -- not accepted
  Islaya paucispinosa Rauh & Backeb. -- not accepted
  Jasminocereus sclerocarpus (K. Schum.) Backeb. -- not accepted
  Jasminocereus thouarsii (F.A.C. Weber) Backeb. -- accepted
  Kadenicarpus pseudomacrochele (Backeb.) Doweld -- not accepted
  Krainzia Backeb. -- not accepted
  Krainzia guelzowiana (Werderm.) Backeb. -- not accepted
  Krainzia longiflora (Britton & Rose) Backeb. -- not accepted
  Lepidocoryphantha Backeb. -- not accepted
  Lepidocoryphantha macromeris (Engelm.) Backeb. -- not accepted
  Lepidocoryphantha runyonii (Britton & Rose) Backeb. -- not accepted
  Lepismium chrysanthum (Loefgr.) Backeb. -- not accepted
  Lepismium epiphyllanthoides Backeb. -- not accepted
  Lepismium floccosum (Salm-Dyck ex Pfeiff.) Backeb. -- not accepted
  Lepismium gibberulum (F.A.C. Weber) Backeb. -- not accepted
  Lepismium grandiflorum (Haw.) Backeb. -- not accepted
  Lepismium megalanthum (Loefgr.) Backeb. -- not accepted
  Lepismium neves-armondii (K. Schum.) Backeb. -- not accepted
  Lepismium pacheco-leonis (Loefgr.) Backeb. -- not accepted
  Lepismium pittieri (Britton & Rose) Backeb. -- not accepted
  Lepismium pulvinigerum (G. Lindb.) Backeb. -- not accepted
  Lepismium puniceodiscus var. chrysocarpum (Loefgr.) Backeb. -- not accepted
  Lepismium saxatile Friedrich, Redecker & Backeb. -- not accepted
  Lepismium trigonum (Pfeiff.) Backeb. -- not accepted
  Lepismium tucumanense (F.A.C. Weber) Backeb. -- not accepted
  Leucostele Backeb. -- not accepted
  Leucostele rivieri Backeb. -- not accepted
  Lobivia allegraiana Backeb. -- not accepted
  Lobivia argentea Backeb. -- not accepted
  Lobivia atrovirens Backeb. -- not accepted
  Lobivia aurantiaca Backeb. -- not accepted
  Lobivia aurea (Britton & Rose) Backeb. -- not accepted
  Lobivia backebergii (Werderm.) Backeb. -- not accepted
  Lobivia backebergii ssp. hertrichiana (Backeb.) Rausch ex G.D. Rowley -- not accepted
  Lobivia backebergii ssp. schieliana (Backeb.) Rausch ex G.D. Rowley -- not accepted
  Lobivia backebergii ssp. wrightiana (Backeb.) Rausch ex G.D. Rowley -- not accepted
  Lobivia backebergii var. hertrichiana (Backeb.) Rausch -- not accepted
  Lobivia backebergii var. schieliana (Backeb.) Rausch -- not accepted
  Lobivia backebergii var. wrightiana (Backeb.) Rausch -- not accepted
  Lobivia binghamiana Backeb. -- not accepted
  Lobivia breviflora Backeb. -- not accepted
  Lobivia brunneo-rosea Backeb. -- not accepted
  Lobivia carminantha Backeb. -- not accepted
  Lobivia chrysacantha (Backeb.) H.P. Kelsey & Dayton -- not accepted
  Lobivia chrysantha (Werderm.) Backeb. -- not accepted
  Lobivia chrysantha ssp. jajoiana (Backeb.) Rausch ex G.D. Rowley -- not accepted
  Lobivia chrysantha var. jajoiana (Backeb.) Rausch -- not accepted
  Lobivia claeysiana Backeb. -- not accepted
  Lobivia cylindracea Backeb. -- not accepted
  Lobivia cylindrica Backeb. -- not accepted
  Lobivia drijveriana Backeb. -- not accepted
  Lobivia drijveriana var. astranthema Backeb. -- not accepted
  Lobivia duursmaiana Backeb. -- not accepted
  Lobivia elongata Backeb. -- not accepted
  Lobivia emmae Backeb. -- not accepted
  Lobivia euanthema Backeb. -- not accepted
  Lobivia eucaliptana Backeb. -- not accepted
  Lobivia haageana Backeb. -- not accepted
  Lobivia hermanniana Backeb. -- not accepted
  Lobivia hertrichiana Backeb. -- not accepted
  Lobivia higginsiana Backeb. -- not accepted
  Lobivia hoffmanniana Backeb. -- not accepted
  Lobivia huilcanota Rauh & Backeb. -- not accepted
  Lobivia incaica Backeb. -- not accepted
  Lobivia incuiensis Rauh & Backeb. -- not accepted
  Lobivia iridescens Backeb. -- not accepted
  Lobivia jajoiana Backeb. -- not accepted
  Lobivia johnsoniana Backeb. -- not accepted
  Lobivia kupperiana Backeb. -- not accepted
  Lobivia lauramarca Rauh & Backeb. -- not accepted
  Lobivia leucorhodon Backeb. -- not accepted
  Lobivia leucoviolacea Backeb. -- not accepted
  Lobivia marsoneri (Werderm.) Backeb. -- not accepted
  Lobivia mirabunda Backeb. -- not accepted
  Lobivia mistiensis (Werderm. & Backeb.) Backeb. -- not accepted
  Lobivia muhriae Backeb. -- not accepted
  Lobivia multicostata Backeb. -- not accepted
  Lobivia nealeana Backeb. -- not accepted
  Lobivia neohaageana Backeb. -- not accepted
  Lobivia nigrispina Backeb. -- not accepted
  Lobivia orurensis Backeb. -- not accepted
  Lobivia pectinata Backeb. -- not accepted
  Lobivia planiceps Backeb. -- not accepted
  Lobivia polaskiana Backeb. -- not accepted
  Lobivia polycephala Backeb. -- not accepted
  Lobivia pseudocachensis Backeb. -- not accepted
  Lobivia pugionacantha (Rose & Boed.) Backeb. -- not accepted
  Lobivia raphidacantha Backeb. -- not accepted
  Lobivia rebutioides Backeb. -- not accepted
  Lobivia rubescens Backeb. -- not accepted
  Lobivia sanguiniflora Backeb. -- not accepted
  Lobivia schieliana Backeb. -- not accepted
  Lobivia schneideriana Backeb. -- not accepted
  Lobivia scopulina Backeb. -- not accepted
  Lobivia steinmannii (Solms) Backeb. -- not accepted
  Lobivia stilowiana Backeb. -- not accepted
  Lobivia tegeleriana Backeb. -- not accepted
  Lobivia varians Backeb. -- not accepted
  Lobivia wegheiana Backeb. -- not accepted
  Lobivia wrightiana Backeb. -- not accepted
  Lobivia wrightiana var. winteriana Backeb. -- not accepted
  Lophocereus mieckleyanus (Weing.) Backeb. -- not accepted
  Loxanthocereus Backeb. -- not accepted
  Loxanthocereus acanthurus (Vaupel) Backeb. -- not accepted
  Loxanthocereus aticensis Rauh & Backeb. -- not accepted
  Loxanthocereus brevispinus Rauh & Backeb. -- not accepted
  Loxanthocereus camanaensis Rauh & Backeb. -- not accepted
  Loxanthocereus canetensis Rauh & Backeb. -- not accepted
  Loxanthocereus cullmannianus Backeb. -- not accepted
  Loxanthocereus erigens Rauh & Backeb. -- not accepted
  Loxanthocereus eriotrichus (Werderm. & Backeb.) Backeb. -- not accepted
  Loxanthocereus eulalianus Rauh & Backeb. -- not accepted
  Loxanthocereus faustianus (Backeb.) Backeb. -- not accepted
  Loxanthocereus ferrugineus Rauh & Backeb. -- not accepted
  Loxanthocereus gracilispinus Rauh & Backeb. -- not accepted
  Loxanthocereus granditessellatus Rauh & Backeb. -- not accepted
  Loxanthocereus hystrix Rauh & Backeb. -- not accepted
  Loxanthocereus jajoianus (Backeb.) Backeb. -- not accepted
  Loxanthocereus keller-badensis Backeb. & Voll -- not accepted
  Loxanthocereus multifloccosus Rauh & Backeb. -- not accepted
  Loxanthocereus nanus Backeb. -- not accepted
  Loxanthocereus pachycladus Rauh & Backeb. -- not accepted
  Loxanthocereus peculiaris Rauh & Backeb. -- not accepted
  Loxanthocereus piscoensis Rauh & Backeb. -- not accepted
  Loxanthocereus pullatus Rauh & Backeb. -- not accepted
  Loxanthocereus riomajensis Rauh & Backeb. -- not accepted
  Loxanthocereus sextonianus (Backeb.) Backeb. -- not accepted
  Loxanthocereus splendens Backeb. -- not accepted
  Loxanthocereus sulcifer Rauh & Backeb. -- not accepted
  Maihueniopsis conoidea (F. Ritter ex Backeb.) F. Ritter -- accepted
  Maihueniopsis mandragora (Backeb.) F. Ritter -- not accepted
  Maihueniopsis minuta (Backeb.) R. Kiesling -- accepted
  Mammillaria albidula Backeb. -- not accepted
  Mammillaria albiflora Backeb. -- accepted
  Mammillaria albilanata Backeb. -- accepted
  Mammillaria albilanata ssp. albilanata Backeb. -- accepted
  Mammillaria atroflorens Backeb. -- not accepted
  Mammillaria aureilanata Backeb. -- accepted
  Mammillaria aurisaeta Backeb. -- not accepted
  Mammillaria avila-camachoi Shurly ex Backeb. -- not accepted
  Mammillaria barkeri Shurly ex Backeb. -- not accepted
  Mammillaria bella Backeb. -- not accepted -- Biznaga bella
  Mammillaria buchenaui Backeb. -- not accepted
  Mammillaria calleana Backeb. -- not accepted
  Mammillaria dixanthocentron Backeb. ex Mottram -- accepted
  Mammillaria egregia Backeb. -- not accepted
  Mammillaria flavicentra Backeb. ex Mottram -- accepted
  Mammillaria flavihamata Backeb. -- not accepted
  Mammillaria fraileana (Britton & Rose) Backeb. -- not accepted
  Mammillaria fuauxiana Backeb. -- not accepted
  Mammillaria gueldemanniana Backeb. -- not accepted
  Mammillaria guillauminiana Backeb. -- accepted
  Mammillaria ingens Backeb. -- not accepted
  Mammillaria lasiacantha ssp. egregia (Backeb. ex Rogoz. & Appenz.) D.R. Hunt -- not accepted
  Mammillaria marnieriana Backeb. -- not accepted
  Mammillaria martinezii Backeb. -- not accepted
  Mammillaria monancistracantha Backeb. -- not accepted
  Mammillaria multiformis (Britton & Rose) Backeb. -- not accepted
  Mammillaria nana Backeb. ex Mottram -- accepted
  Mammillaria neobertrandiana Backeb. -- not accepted
  Mammillaria neocrucigera Backeb. -- not accepted
  Mammillaria neomystax Backeb. -- not accepted
  Mammillaria neophaeacantha Fritz Schwarz ex Backeb. -- not accepted
  Mammillaria neoschwarzeana Backeb. -- not accepted
  Mammillaria nunezii ssp. bella (Backeb.) D.R. Hunt -- accepted
  Mammillaria pachycylindrica Backeb. -- not accepted
  Mammillaria pachyrhiza Backeb. -- not accepted
  Mammillaria pectinifera ssp. solisioides (Backeb.) D.R. Hunt -- accepted
  Mammillaria pseudoscrippsiana Backeb. -- not accepted
  Mammillaria pseudosimplex W. Haage & Backeb. -- not accepted
  Mammillaria rubida Fritz Schwarz ex Backeb. -- not accepted
  Mammillaria saint-pieana Backeb. -- not accepted
  Mammillaria solisioides Backeb. -- not accepted
  Mammillaria subtilis Backeb. -- not accepted
  Mammillaria wuthenauiana Backeb. -- not accepted
  Marenopuntia Backeb. -- not accepted
  Marenopuntia marenae (S.H. Parsons) Backeb. -- not accepted
  Marginatocereus Backeb. -- not accepted
  Marginatocereus marginatus (DC.) Backeb. -- not accepted
  Marniera Backeb. -- not accepted
  Marniera chrysocardium (Alexander) Backeb. -- not accepted
  Marshallocereus Backeb. -- not accepted
  Marshallocereus aragonii (F.A.C. Weber) Backeb. -- not accepted
  Marshallocereus thurberi (Engelm.) Backeb. -- not accepted
  Marshallocereus thurberi var. littoralis (K. Brandegee) Backeb. -- not accepted
  Matucana blancii Backeb. -- not accepted
  Matucana breviflora Rauh & Backeb. -- not accepted
  Matucana cereoides Rauh & Backeb. -- not accepted
  Matucana elongata Rauh & Backeb. -- not accepted
  Matucana haynei ssp. herzogiana (Backeb.) Mottram -- accepted
  Matucana haynei ssp. hystrix (Rauh & Backeb.) Mottram -- accepted
  Matucana herzogiana Backeb. -- not accepted
  Matucana hystrix Rauh & Backeb. -- not accepted
  Matucana multicolor Rauh & Backeb. -- not accepted
  Matucana variabilis Rauh & Backeb. -- not accepted
  Matucana weberbaueri (Vaupel) Backeb. -- accepted
  Matucana yanganucensis Rauh & Backeb. -- not accepted
  Mediocactus hahnianus Backeb. -- not accepted
  Mediocactus hassleri (K. Schum.) Backeb. -- not accepted
  Mediocactus lindmanii (F.A.C. Weber) Backeb. -- not accepted
  Mediolobivia Backeb. -- not accepted
  Mediolobivia elegans Backeb. -- not accepted
  Mediolobivia euanthema var. fricii Backeb. -- not accepted
  Mediolobivia eucaliptana (Backeb.) Krainz -- not accepted
  Mediolobivia neopygmaea Backeb. -- not accepted
  Melocactus amstutziae Rauh & Backeb. -- not accepted
  Melocactus bellavistensis Rauh & Backeb. -- accepted
  Melocactus bellavistensis ssp. bellavistensis Rauh & Backeb. -- accepted
  Melocactus coronatus (Lam.) Backeb. -- not accepted
  Melocactus fortalezensis Rauh & Backeb. -- not accepted
  Melocactus huallancaensis Rauh & Backeb. -- not accepted
  Melocactus jansenianus Backeb. -- not accepted
  Melocactus oaxacensis (Britton & Rose) Backeb. -- not accepted
  Melocactus trujilloensis Rauh & Backeb. -- not accepted
  Melocactus unguispinus Rauh & Backeb. -- not accepted
  Micranthocereus Backeb. -- accepted
  Micranthocereus polyanthus (Werderm.) Backeb. -- accepted
  Micranthocereus polyanthus ssp. polyanthus (Werderm.) Backeb. -- accepted
  Mila albisaetacens Rauh & Backeb. -- not accepted
  Mila caespitosa ssp. nealeana (Backeb.) Donald -- not accepted
  Mila caespitosa ssp. pugionifera (Rauh & Backeb.) D.R. Hunt -- accepted
  Mila cereoides Rauh & Backeb. -- not accepted
  Mila densiseta Rauh & Backeb. -- not accepted
  Mila fortalezensis Rauh & Backeb. -- not accepted
  Mila kubeana Werderm. & Backeb. -- not accepted
  Mila lurinensis Rauh & Backeb. -- not accepted
  Mila nealeana Backeb. -- not accepted
  Mila pugionifera Rauh & Backeb. -- not accepted
  Mila sublanata Rauh & Backeb. -- not accepted
  Mitrocereus Backeb. -- not accepted
  Mitrocereus ruficeps (F.A.C. Weber ex Rol.-Goss.) Backeb. -- not accepted
  Monvillea campinensis (Backeb. & Voll) Backeb. -- not accepted
  Monvillea euchlora (F.A.C. Weber ex K. Schum.) Backeb. -- not accepted
  Monvillea haageana Backeb. -- not accepted
  Monvillea jaenensis Rauh & Backeb. -- not accepted
  Monvillea lindenzweigiana (Gürke) Backeb. -- not accepted
  Monvillea smithiana (Britton & Rose) Backeb. -- not accepted
  Morawetzia Backeb. -- not accepted
  Morawetzia doelziana Backeb. -- not accepted
  Navajoa fickeisenii Backeb. -- not accepted
  Navajoa peeblesiana ssp. fickeisenii (Backeb. ex Hochstätter) Hochstätter -- not accepted
  Navajoa peeblesiana var. fickeisenii Backeb. ex Hochstätter -- not accepted
  Neobinghamia Backeb. -- not accepted
  Neobuxbaumia Backeb. -- accepted
  Neobuxbaumia mezcalaensis (Bravo) Backeb. -- accepted
  Neobuxbaumia polylopha (DC.) Backeb. -- accepted
  Neobuxbaumia scoparia (Polseg.) Backeb. -- accepted
  Neobuxbaumia tetetzo (J.M. Coult.) Backeb. -- accepted
  Neocardenasia Backeb. -- not accepted
  Neocardenasia herzogiana Backeb. -- not accepted
  Neochilenia Backeb. -- not accepted
  Neochilenia andreaeana Backeb. -- not accepted
  Neochilenia atra Backeb. -- not accepted
  Neochilenia deherdtiana Backeb. -- not accepted
  Neochilenia eriocephala Backeb. -- not accepted
  Neochilenia imitans Backeb. -- not accepted
  Neochilenia lembckei Backeb. -- not accepted
  Neochilenia monte-amargensis Backeb. -- not accepted
  Neochilenia neofusca Backeb. -- not accepted
  Neochilenia neoreichei Backeb. -- not accepted
  Neochilenia pseudoreichei Lembcke & Backeb. -- not accepted
  Neodawsonia Backeb. -- not accepted
  Neolloydia matehualensis Backeb. -- accepted
  Neolloydia odorata (Boed.) Backeb. -- not accepted
  Neolloydia pulleineana Backeb. -- not accepted
  Neolobivia hertrichiana (Backeb.) F. Ritter -- not accepted
  Neolobivia incaica (Backeb.) F. Ritter -- not accepted
  Neoporteria andreaeana (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria aspillagai (Söhrens) Backeb. -- not accepted
  Neoporteria atrispinosa (Backeb.) Backeb. -- not accepted
  Neoporteria cephalophora (Backeb.) Backeb. -- not accepted
  Neoporteria deherdtiana (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria dubia (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria eriocephala (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria heteracantha (Kreuz. & Buining) Backeb. -- not accepted
  Neoporteria melanacantha (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria monte-amargensis (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria napina (Phil.) Backeb. -- not accepted
  Neoporteria odieri (Lem. ex Salm-Dyck) Backeb. -- not accepted
  Neoporteria polyraphis (Pfeiff. ex Salm-Dyck) Backeb. -- not accepted
  Neoporteria reichei (K. Schum.) Backeb. -- not accepted
  Neoporteria reichii (K. Schum.) Backeb. -- not accepted
  Neoporteria senilis (Phil.) Backeb. -- not accepted
  Neoporteria setiflora (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria subaiana (Backeb.) Donald & G.D.Rowley -- not accepted
  Neoporteria subcylindrica (Backeb.) Backeb. -- not accepted
  Neoporteria volliana (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoporteria woutersiana (Backeb.) Donald & G.D. Rowley -- not accepted
  Neoraimondia arequipensis (Meyen) Backeb. -- accepted
  Neoraimondia aticensis Rauh & Backeb. -- not accepted
  Neoraimondia herzogiana (Backeb.) Buxb. & Krainz -- accepted
  Neoraimondia roseiflora (Backeb.) Backeb. -- not accepted
  Neowerdermannia chilensis Backeb. -- accepted
  Neowerdermannia chilensis ssp. chilensis Backeb. -- not accepted
  Nopalea nuda Backeb. -- not accepted
  Normanbokea pseudopectinata (Backeb.) Kladiwa & Buxb. -- not accepted
  Notocactus alacriportanus (Backeb. & Voll) Buxb. -- not accepted
  Notocactus brevihamatus (W. Haage ex Backeb.) Krainz -- not accepted
  Notocactus caespitosus (Speg.) Backeb. -- not accepted
  Notocactus mueller-melchersii Fric ex Backeb. -- not accepted
  Notocactus submammulosus (Lem.) Backeb. -- not accepted
  Opuntia albisaetacens Backeb. -- not accepted
  Opuntia armata Backeb. -- not accepted
  Opuntia blancii (Backeb.) G.D. Rowley -- not accepted
  Opuntia conoidea (F. Ritter ex Backeb.) G.D. Rowley -- not accepted
  Opuntia crassicylindrica (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia crispicrinita (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia cylindrolanata (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia erectoclada Backeb. -- not accepted
  Opuntia flexuosa (Backeb.) G.D. Rowley -- not accepted
  Opuntia fragilis var. denudata E.F. Wiegand & Backeb. -- not accepted
  Opuntia fulvicoma (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia gracilicylindrica (E.F. Wiegand & Backeb.) G.D. Rowley -- not accepted
  Opuntia hirschii (Backeb.) G.D. Rowley -- not accepted
  Opuntia minuscula (Backeb.) G.D. Rowley -- not accepted
  Opuntia minuta (Backeb.) Castell. -- not accepted
  Opuntia mistiensis (Backeb.) G.D. Rowley -- not accepted
  Opuntia neoargentina (Backeb.) G.D. Rowley -- not accepted
  Opuntia nuda (Backeb.) G.D. Rowley -- not accepted
  Opuntia pseudoudonis (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia punta-caillan (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia pygmaea (E.F. Wiegand & Backeb.) G.D. Rowley -- not accepted
  Opuntia rauhii (Backeb.) G.D. Rowley -- not accepted
  Opuntia rossiana (Heinrich & Backeb.) D.R. Hunt -- not accepted
  Opuntia silvestris Backeb. -- not accepted
  Opuntia steiniana (Backeb.) G.D. Rowley -- not accepted
  Opuntia tephrocactoides (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia tuberculosirhopalica (E.F. Wiegand & Backeb.) G.D. Rowley -- not accepted
  Opuntia unguispina Backeb. -- not accepted
  Opuntia wiegandii (Backeb.) G.D. Rowley -- not accepted
  Opuntia woodsii Backeb. -- not accepted
  Opuntia yanganucensis (Rauh & Backeb.) G.D. Rowley -- not accepted
  Opuntia zehnderi (Rauh & Backeb.) G.D. Rowley -- not accepted
  Oreocereus crassiniveus Backeb. -- not accepted
  Oreocereus doelzianus (Backeb.) Borg -- accepted
  Oreocereus doelzianus ssp. calvus (Rauh & Backeb) Mottram -- accepted
  Oreocereus doelzianus ssp. doelzianus (Backeb.) Borg -- accepted
  Oreocereus fossulatus (Labour.) Backeb. -- not accepted
  Oreocereus hendriksenianus (Backeb.) Backeb. -- not accepted
  Oreocereus maximus Backeb. -- not accepted
  Oreocereus neocelsianus Backeb. -- not accepted
  Oreocereus piscoensis (Rauh & Backeb.) F. Ritter -- not accepted
  Oreocereus varicolor Backeb. -- not accepted
  Oreocereus variicolor Backeb. -- not accepted
  Oroya borchersii (Boed.) Backeb. -- accepted
  Oroya laxiareolata Rauh & Backeb. -- not accepted
  Oroya neoperuviana Backeb. -- not accepted
  Oroya subocculta Rauh & Backeb. -- not accepted
  Pachycereus gigas (Backeb.) Backeb. -- not accepted
  Pachycereus weberi (J.M. Coult.) Backeb. -- accepted
  Parodia alacriportana Backeb. & Voll -- accepted
  Parodia alacriportana ssp. alacriportana Backeb. & Voll -- not accepted
  Parodia applanata (Hoffm. & Backeb.) F.H. Brandt -- not accepted
  Parodia atroviridis Backeb. -- not accepted
  Parodia aureicentra Backeb. -- accepted
  Parodia aureispina Backeb. -- not accepted
  Parodia carminata Backeb. -- not accepted
  Parodia catamarcensis Backeb. -- not accepted
  Parodia chrysacanthion (K. Schum.) Backeb. -- accepted
  Parodia dextrohamata Backeb. -- not accepted
  Parodia faustiana Backeb. -- not accepted
  Parodia fechseri Backeb. -- not accepted
  Parodia fusco-viridis Backeb. -- not accepted
  Parodia gummifera Backeb. & Voll -- not accepted
  Parodia gutekunstiana Backeb. -- not accepted
  Parodia kilianana Backeb. -- not accepted
  Parodia mueller-melchersii (Backeb.) N.P. Taylor -- accepted
  Parodia mueller-melchersii ssp. mueller-melchersii (Backeb.) N.P. Taylor -- not accepted
  Parodia mutabilis Backeb. -- not accepted
  Parodia nivosa (Fric) Backeb. -- accepted
  Parodia pseudostuemeri Backeb. -- not accepted
  Parodia rauschii Backeb. -- not accepted
  Parodia rigida Backeb. -- not accepted
  Parodia rubellihamata Backeb. -- not accepted
  Parodia rubricentra Backeb. -- not accepted
  Parodia rubriflora Backeb. -- not accepted
  Parodia saint-pieana Backeb. -- not accepted
  Parodia salmonea (Backeb.) F.H. Brandt -- not accepted
  Parodia sanguiniflora Backeb. -- not accepted
  Parodia schwebsiana (Werderm.) Backeb. -- accepted
  Parodia scopaoides Backeb. -- not accepted
  Parodia setifera Backeb. -- not accepted
  Parodia setosa Backeb. -- not accepted
  Parodia stuemeri (Werderm.) Backeb. -- accepted
  Parodia tafiensis Backeb. -- not accepted
  Parodia tilcarensis (Werderm. & Backeb.) Backeb. -- not accepted
  Parodia tuberculosi-costata Backeb. -- not accepted
  Parodia uhligiana Backeb. -- not accepted
  Pediocactus peeblesianus var. fickeiseniae (Backeb.) L.D. Benson -- not accepted -- Fickeisen plains cactus, Fickeisen's pediocactus, Navajo pincushion cactus
  Pediocactus peeblesianus var. fickeisenii (Backeb.) L.D. Benson -- not accepted
  Pediocactus pseudomacrochele (Backeb.) Halda -- not accepted
  Pediocactus pseudopectinatus (Backeb.) Halda -- not accepted
  Pediocactus schmiedickeanus var. klinkerianus (Backeb. & H. Jacobsen) Halda -- not accepted
  Pediocactus subterraneus (Backeb.) Halda -- not accepted
  Pelecyphora pseudopectinata Backeb. -- not accepted
  Peniocereus diguetii (F.A.C. Weber) Backeb. -- not accepted
  Peniocereus greggii var. transmontanus (Engelm.) Backeb. -- accepted -- nightblooming cereus
  Pereskia aculeata var. godseffiana (hort. ex Gard. Chron.) Backeb. & F.M. Knuth ex Krainz -- not accepted
  Pereskia horrida ssp. rauhii (Backeb.) Ostolaza -- accepted
  Pereskia humboldtii var. rauhii (Backeb.) Leuenb. -- not accepted
  Philippicereus Backeb. -- not accepted
  Philippicereus castaneus (K. Schum.) Backeb. -- not accepted
  Pilocereus bradei Backeb. & Voll -- not accepted
  Pilocereus floccosus Backeb. & Voll -- not accepted
  Pilosocereus bradei (Backeb. & Voll) Byles & G.D. Rowley -- not accepted
  Pilosocereus brasiliensis (Britton & Rose) Backeb. -- accepted
  Pilosocereus brasiliensis ssp. brasiliensis (Britton & Rose) Backeb. -- accepted
  Pilosocereus claroviridis (Backeb.) Byles & G.D. Rowley -- not accepted
  Pilosocereus floccosus (Backeb. & Voll) Byles & G.D. Rowley -- accepted
  Pilosocereus floccosus ssp. floccosus (Backeb. & Voll) Byles & G.D. Rowley -- accepted
  Pilosocereus gaumeri (Britton & Rose) Backeb. -- not accepted
  Pilosocereus gironensis Rauh, Backeb. ex Byles & G.D. Rowley -- not accepted
  Pilosocereus guerreronis (Backeb.) Byles & G.D. Rowley -- not accepted
  Pilosocereus machrisii (E.Y. Dawson) Backeb. -- accepted
  Pilosocereus mortensenii (Croizat) Backeb. -- not accepted
  Pilosocereus quadricentralis (E.Y. Dawson) Backeb. -- accepted
  Pilosocereus tuberculosus Rauh & Backeb. ex Byles & G.D. Rowley -- not accepted
  Platyopuntia albisaetacens (Backeb.) F. Ritter -- not accepted
  Platyopuntia atroglobosa (Backeb.) F. Ritter -- not accepted
  Polaskia Backeb. -- accepted
  Polaskia chichipe (Rol.-Goss.) Backeb. -- accepted
  Praecereus campinensis (Backeb. & Voll) Buxb. -- not accepted
  Praecereus euchlorus ssp. jaenensis (Rauh & Backeb.) Ostolaza -- accepted
  Praecereus jaenensis (Rauh & Backeb.) Buxb. -- not accepted
  Pseudoespostoa Backeb. -- not accepted
  Pseudoespostoa melanostele (Vaupel) Backeb. -- not accepted
  Pseudoespostoa nana (F. Ritter) Backeb. -- not accepted
  Pseudolobivia (Backeb.) Backeb. -- not accepted
  Pseudolobivia ancistrophora (Speg.) Backeb. -- not accepted
  Pseudolobivia aurea (Britton & Rose) Backeb. -- not accepted
  Pseudolobivia boyuibensis (F. Ritter) Backeb. -- not accepted
  Pseudolobivia callichroma (Cárdenas) Backeb. -- not accepted
  Pseudolobivia calorubra (Cárdenas) Backeb. -- not accepted
  Pseudolobivia carmineiflora Werner Hoffm. & Backeb. -- not accepted
  Pseudolobivia ferox (Britton & Rose) Backeb. -- not accepted
  Pseudolobivia hamatacantha (Backeb.) Backeb. -- not accepted
  Pseudolobivia kratochviliana (Backeb.) Backeb. -- not accepted
  Pseudolobivia lecoriensis (Cárdenas) Backeb. -- not accepted
  Pseudolobivia leucorhodantha (Backeb.) Backeb. ex Krainz -- not accepted
  Pseudolobivia longispina (Britton & Rose) Backeb. ex Krainz -- not accepted
  Pseudolobivia obrepanda (Salm-Dyck) Backeb. ex Krainz -- not accepted
  Pseudolobivia orozasana (F. Ritter) Backeb. -- not accepted
  Pseudolobivia pelecyrhachis (Backeb.) Backeb. ex Krainz -- not accepted
  Pseudolobivia pelecyrhachis var. lobivioides (Backeb.) Backeb. -- not accepted
  Pseudolobivia polyancistra (Backeb.) Backeb. -- not accepted
  Pseudolobivia potosina (Werderm.) Backeb. ex Krainz -- not accepted
  Pseudolobivia rojasii (Cárdenas) Backeb. -- not accepted
  Pseudolobivia toralapana (Cárdenas) Backeb. -- not accepted
  Pseudolobivia torrecillasensis (Cárdenas) Backeb. -- not accepted
  Pseudolobivia wilkeae Backeb. -- not accepted
  Pseudonopalxochia Backeb. -- not accepted
  Pseudonopalxochia conzattiana (T. MacDoug.) Backeb. -- not accepted
  Pseudopilocereus bradei (Backeb. & Voll) Buxb. -- not accepted
  Pseudopilocereus cuyabensis (Backeb.) Buxb. -- not accepted
  Pseudopilocereus floccosus (Backeb. & Voll) Buxb. -- not accepted
  Pseudozygocactus Backeb. -- not accepted
  Pseudozygocactus epiphylloides (Porto & Werderm.) Backeb. -- not accepted
  Pterocactus australis (F.A.C. Weber) Backeb. -- accepted
  Pterocactus skottsbergii (Britton & Rose) Backeb. -- not accepted
  Pygmaeocereus H. Johnson & Backeb. -- accepted
  Pygmaeocereus bylesianus Andreae & Backeb. -- accepted
  Pyrrhocactus atrospinosus Backeb. -- not accepted
  Pyrrhocactus bulbocalyx (Werderm.) Backeb. -- not accepted
  Pyrrhocactus deherdtianus (Backeb.) Katt. -- not accepted
  Pyrrhocactus dubius Backeb. -- not accepted
  Pyrrhocactus floribundus (Backeb.) F. Ritter -- not accepted
  Pyrrhocactus heinrichianus (Backeb.) F. Ritter -- not accepted
  Pyrrhocactus horridus (Colla) Backeb. -- not accepted
  Pyrrhocactus melanacanthus Backeb. -- not accepted
  Pyrrhocactus sanjuanensis (Speg.) Backeb. -- not accepted
  Pyrrhocactus setiflorus Backeb. -- not accepted
  Pyrrhocactus setosiflorus Backeb. -- not accepted
  Pyrrhocactus subaianus Backeb. -- not accepted
  Pyrrhocactus umadeave (Werderm.) Backeb. -- not accepted
  Pyrrhocactus vollianus Backeb. -- not accepted
  Quiabentia chacoensis Backeb. -- not accepted
  Quiabentia pereziensis Backeb. -- not accepted
  Rapicactus subterraneus (Backeb.) Buxb. & Oehme -- not accepted
  Rathbunia neosonorensis Backeb. -- not accepted
  Rauhocereus Backeb. -- accepted
  Rauhocereus riosaniensis Backeb. -- accepted
  Rauhocereus riosaniensis ssp. jaenensis (Rauh ex Backeb.) Ostolaza -- accepted
  Rauhocereus riosaniensis ssp. riosaniensis Backeb. -- accepted
  Rebutia atrovirens (Backeb.) Pilbeam -- not accepted
  Rebutia aureiflora Backeb. -- not accepted
  Rebutia aureiflora ssp. elegans (Backeb.) Donald -- not accepted
  Rebutia aureiflora var. elegans (Backeb.) Buining & Donald -- not accepted
  Rebutia breviflora (Backeb.) D.R. Hunt -- accepted
  Rebutia chrysacantha Backeb. -- not accepted
  Rebutia euanthema (Backeb.) Buining & Donald -- not accepted
  Rebutia eucaliptana (Backeb.) F. Ritter -- not accepted
  Rebutia fidaiana (Backeb.) D.R. Hunt -- not accepted
  Rebutia fidaiana ssp. fidaiana (Backeb.) D.R. Hunt -- not accepted
  Rebutia fidana (Backeb.) D.R. Hunt -- accepted
  Rebutia fidana ssp. fidana (Backeb.) D.R. Hunt -- accepted
  Rebutia graciliflora Backeb. -- not accepted
  Rebutia grandiflora Backeb. -- not accepted
  Rebutia hyalacantha (Backeb.) Backeb. -- not accepted
  Rebutia krugerae (Cárdenas) Backeb. -- accepted
  Rebutia minuscula ssp. grandiflora (Backeb.) Donald -- not accepted
  Rebutia minuscula ssp. violaciflora (Backeb.) Donald -- not accepted
  Rebutia minuscula var. grandiflora (Backeb.) Krainz -- not accepted
  Rebutia neocumingii (Backeb.) D.R. Hunt -- accepted
  Rebutia neocumingii ssp. neocumingii (Backeb.) D.R. Hunt -- accepted
  Rebutia orurensis (Backeb.) F. Ritter -- not accepted
  Rebutia pseudodeminuta Backeb. -- not accepted
  Rebutia senilis Backeb. -- not accepted
  Rebutia senilis ssp. chrysacantha (Backeb.) Donald -- not accepted
  Rebutia senilis var. chrysacantha (Backeb.) Donald -- not accepted
  Rebutia spegazziniana Backeb. -- not accepted
  Rebutia spinosissima Backeb. -- not accepted
  Rebutia violaciflora Backeb. -- not accepted
  Rebutia xanthocarpa Backeb. -- not accepted
  Reicheocactus Backeb. -- not accepted
  Reicheocactus floribundus Backeb. -- not accepted
  Reicheocactus neoreichei (Backeb.) Backeb. -- not accepted
  Reicheocactus pseudoreicheanus Backeb. -- not accepted
  Rhipsalis cassuthopsis Backeb. -- not accepted
  Rhipsalis cereoides (Backeb. & Voll) Backeb. -- accepted
  Rhipsalis goebeliana Backeb. -- not accepted
  Rhipsalis heptagona Rauh & Backeb. -- not accepted
  Rhipsalis saxatile (Friedrich, Redecker & Backeb.) Friedrich & Redecker -- not accepted
  Rhodocactus antonianus Backeb. -- not accepted
  Rhodocactus corrugatus (Cutak) Backeb. -- not accepted
  Rhodocactus higueranus (Cárdenas) Backeb. -- not accepted
  Rhodocactus sacharosa (Griseb.) Backeb. -- not accepted
  Rhodocactus saipinensis (Cárdenas) Backeb. -- not accepted
  Rhodocactus tampicanus (F.A.C. Weber) Backeb. -- not accepted
  Ritterocereus Backeb. -- not accepted
  Ritterocereus deficiens (Otto & A. Dietr.) Backeb. -- not accepted
  Ritterocereus eichlamii (Britton & Rose) Backeb. -- not accepted
  Ritterocereus griseus (Haw.) Backeb. -- not accepted
  Ritterocereus laevigatus (Salm-Dyck) Backeb. -- not accepted
  Ritterocereus pruinosus (Otto ex Pfeiff.) Backeb. -- not accepted
  Ritterocereus queretaroensis (F.A.C. Weber) Backeb. -- not accepted
  Ritterocereus standleyi (J.G. Ortega) Backeb. -- not accepted
  Rooksbya (Backeb.) Backeb. -- not accepted
  Rooksbya euphorbioides (Haw.) Backeb. -- not accepted
  Roseocactus intermedius Backeb. & Kilian -- not accepted
  Roseocactus kotschoubeyanus ssp. macdowellii Backeb. -- not accepted
  Roseocactus kotschoubeyanus var. albiflorus Backeb. -- not accepted
  Roseocactus kotschoubeyanus var. macdowellii (Backeb.) Backeb. -- not accepted
  Roseocereus Backeb. -- not accepted
  Roseocereus tephracanthus (Labour.) Backeb. -- not accepted
  Seticereus Backeb. -- not accepted
  Seticereus chlorocarpus (Kunth) Backeb. -- not accepted
  Seticereus humboldtii (Kunth) Backeb. -- not accepted
  Seticereus icosagonus (Kunth) Backeb. -- not accepted
  Seticleistocactus Backeb. -- not accepted
  Seticleistocactus dependens (Cárdenas) Backeb. -- not accepted
  Seticleistocactus piraymirensis (Cárdenas) Backeb. -- not accepted
  Setiechinopsis (Backeb.) de Haas -- not accepted
  Setiechinopsis mirabilis (Speg.) Backeb. ex de Haas -- not accepted
  Soehrensia Backeb. -- not accepted
  Soehrensia bruchii (Britton & Rose) Backeb. -- not accepted
  Soehrensia formosa (Pfeiff.) Backeb. -- not accepted
  Soehrensia ingens Backeb. -- not accepted
  Soehrensia korethroides (Werderm.) Backeb. -- not accepted
  Soehrensia oreopepon (Speg.) Backeb. -- not accepted
  Soehrensia smrziana (Speg.) Backeb. -- not accepted
  Soehrensia uebelmanniana Lembcke & Backeb. -- not accepted
  Spegazzinia Backeb. -- not accepted
  Spegazzinia fidaiana (Backeb.) Backeb. -- not accepted
  Stenocactus dichroacanthus (Mart.) A. Berger ex Backeb. & F.M. Knuth -- not accepted
  Stenocactus lancifer (A. Dietr.) A. Berger ex Backeb. & F.M. Knuth -- not accepted
  Stenocereus treleasei (Rose) Backeb. -- accepted
  Strombocactus klinkerianus (Backeb. & H. Jacobsen) Buining & Brederoo -- not accepted
  Strombocactus pseudomacrochele Backeb. -- not accepted
  Strombocactus schmiedickeanus var. klinkerianus (Backeb. & H. Jacobsen) G.D. Rowley -- not accepted
  Submatucana Backeb. -- not accepted
  Submatucana aurantiaca (Vaupel) Backeb. -- not accepted
  Submatucana calvescens (Kimnach & Hutchison) Backeb. -- not accepted
  Submatucana formosa (F. Ritter) Backeb. -- not accepted
  Submatucana intertexta (F. Ritter) Backeb. -- not accepted
  Submatucana madisoniorum (Hutchison) Backeb. -- not accepted
  Submatucana myriacantha (Vaupel) Backeb. -- not accepted
  Submatucana paucicostata (F. Ritter) Backeb. -- not accepted
  Submatucana ritteri (Buining) Backeb. -- not accepted
  Subpilocereus Backeb. -- not accepted
  Subpilocereus atroviridis (Backeb.) Backeb. -- not accepted
  Subpilocereus grenadensis (Britton & Rose) Backeb. -- not accepted
  Subpilocereus horrispinus (Backeb.) Backeb. -- not accepted
  Subpilocereus remolinensis (Backeb.) Backeb. -- not accepted
  Subpilocereus repandus (L.) Backeb. -- not accepted
  Subpilocereus russelianus (Rümpler) Backeb. -- not accepted
  Sulcorebutia Backeb. -- not accepted
  Sulcorebutia breviflora Backeb. -- not accepted
  Sulcorebutia chilensis (Backeb.) F.H. Brandt -- not accepted
  Sulcorebutia fidaiana (Backeb.) F.H. Brandt -- not accepted
  Sulcorebutia hediniana (Backeb.) F.H. Brandt -- not accepted
  Sulcorebutia hoffmanniana (Backeb.) Backeb. -- not accepted
  Sulcorebutia neocumingii (Backeb.) F.H. Brandt -- not accepted
  Sulcorebutia neumanniana (Backeb.) F.H. Brandt -- not accepted
  Sulcorebutia polymorpha (Cárdenas) Backeb. -- not accepted
  Sulcorebutia steinbachii (Werderm.) Backeb. -- not accepted
  Sulcorebutia xanthoantha Backeb. -- not accepted
  Sulcorebutia zavaletae (Cárdenas) Backeb. -- not accepted
  Tephrocactus albiscoparius Backeb. -- not accepted
  Tephrocactus alboareolatus Backeb. -- not accepted
  Tephrocactus alexanderi (Britton & Rose) Backeb. -- accepted
  Tephrocactus articulatus (Otto) Backeb. -- accepted
  Tephrocactus asplundii Backeb. -- not accepted
  Tephrocactus atacamensis (Phil.) Backeb. -- not accepted
  Tephrocactus atroglobosus Backeb. -- not accepted
  Tephrocactus atroviridis (Werderm. & Backeb.) Backeb. -- not accepted
  Tephrocactus blancii Backeb. -- not accepted
  Tephrocactus bolivianus (Salm-Dyck) Backeb. -- not accepted
  Tephrocactus camachoi (Espinosa) Backeb. -- not accepted
  Tephrocactus corotilla (K. Schum.) Backeb. -- not accepted
  Tephrocactus crassicylindricus Rauh & Backeb. -- not accepted
  Tephrocactus crispicrinitus Rauh & Backeb. -- not accepted
  Tephrocactus cylindrolanatus Rauh & Backeb. -- not accepted
  Tephrocactus dactyliferus (Vaupel) Backeb. -- not accepted
  Tephrocactus dimorphus (C.F. Först.) Backeb. -- not accepted
  Tephrocactus ferocior Backeb. -- not accepted
  Tephrocactus flexuosus Backeb. -- not accepted
  Tephrocactus floccosus (Salm-Dyck) Backeb. -- not accepted
  Tephrocactus fulvicomus Rauh & Backeb. -- not accepted
  Tephrocactus geometricus (A. Cast.) Backeb. -- not accepted
  Tephrocactus heteromorphus (Phil.) Backeb. -- not accepted
  Tephrocactus hirschii Backeb. -- not accepted
  Tephrocactus ignescens (Vaupel) Backeb. -- not accepted
  Tephrocactus kuehnrichianus (Werderm. & Backeb.) Backeb. -- not accepted
  Tephrocactus lagopus (K. Schum.) Backeb. -- not accepted
  Tephrocactus mandragora Backeb. -- not accepted
  Tephrocactus melanacanthus Backeb. -- not accepted
  Tephrocactus microclados Backeb. -- not accepted
  Tephrocactus microsphaericus Backeb. -- not accepted
  Tephrocactus minusculus Backeb. -- not accepted
  Tephrocactus minutus Backeb. -- not accepted
  Tephrocactus mirus Rauh & Backeb. -- not accepted
  Tephrocactus mistiensis Backeb. -- not accepted
  Tephrocactus molinensis (Speg.) Backeb. -- accepted
  Tephrocactus muellerianus Backeb. -- not accepted
  Tephrocactus neuquensis (Borg) Backeb. -- not accepted
  Tephrocactus nigrispinus (K. Schum.) Backeb. -- accepted
  Tephrocactus noodtiae Backeb. & H. Jacobsen -- not accepted
  Tephrocactus ovatus (Pfeiff.) Backeb. -- not accepted
  Tephrocactus pentlandii (Salm-Dyck) Backeb. -- not accepted
  Tephrocactus pseudoudonis Rauh & Backeb. -- not accepted
  Tephrocactus punta-caillan Rauh & Backeb. -- not accepted
  Tephrocactus pyrrhacanthus (K. Schum.) Backeb. -- not accepted
  Tephrocactus rarissimus Backeb. -- not accepted
  Tephrocactus rauhii Backeb. -- not accepted
  Tephrocactus reicheanus (Espinosa) Backeb. -- not accepted
  Tephrocactus russellii (Britton & Rose) Backeb. -- not accepted
  Tephrocactus silvestris Backeb. -- not accepted
  Tephrocactus sphaericus (C.F. Först.) Backeb. -- not accepted
  Tephrocactus subinermis Backeb. -- not accepted
  Tephrocactus subterraneus (R.E. Fr.) Backeb. -- not accepted
  Tephrocactus tarapacanus (Phil.) Backeb. -- not accepted
  Tephrocactus udonis (Weing.) Backeb. -- not accepted
  Tephrocactus variiflorus Backeb. -- not accepted
  Tephrocactus verticosus (Weing.) Backeb. -- not accepted
  Tephrocactus weberi (Speg.) Backeb. -- accepted
  Tephrocactus wilkeanus Backeb. -- not accepted
  Tephrocactus yanganucensis Rauh & Backeb. -- not accepted
  Tephrocactus zehnderi Rauh & Backeb. -- not accepted
  Thelocactus bicolor ssp. flavidispinus (Backeb.) N.P. Taylor -- accepted
  Thelocactus bicolor ssp. schwarzii (Backeb.) N.P. Taylor -- accepted
  Thelocactus bicolor var. flavidispinus Backeb. -- not accepted -- glory of Texas
  Thelocephala lembckei (Backeb.) F. Ritter -- not accepted
  Thrixanthocereus Backeb. -- not accepted
  Thrixanthocereus blossfeldiorum (Werderm.) Backeb. -- not accepted
  Toumeya fickeisenii (Backeb.) W.H. Earle -- not accepted
  Toumeya klinkeriana (Backeb. & H. Jacobsen) Bravo & W.T. Marshall -- not accepted
  Toumeya pseudomacrochele (Backeb.) W.T. Marshall -- not accepted
  Toumeya schmiedickeana var. klinkeriana (Backeb. & H. Jacobsen) Krainz -- not accepted
  Trichocereus bertramianus Backeb. -- not accepted
  Trichocereus cephalomacrostibas Backeb. -- not accepted
  Trichocereus chalaensis Rauh & Backeb. -- not accepted
  Trichocereus courantii (K. Schum.) Backeb. -- not accepted
  Trichocereus grandiflorus Backeb. -- not accepted
  Trichocereus ingens (Backeb.) F. Ritter -- not accepted
  Trichocereus knuthianus Backeb. -- not accepted
  Trichocereus manguinii Backeb. -- not accepted
  Trichocereus neolamprochlorus Backeb. -- not accepted
  Trichocereus poco Backeb. -- not accepted
  Trichocereus puquiensis Rauh & Backeb. -- not accepted
  Trichocereus rivierei (Backeb.) Krainz -- not accepted
  Trichocereus rubinghianus Backeb. -- not accepted
  Trichocereus santaensis (Speg.) Backeb. -- not accepted
  Trichocereus schoenii Rauh & Backeb. -- not accepted
  Trichocereus skottsbergii Backeb. ex Skottsb. -- not accepted
  Trichocereus smrzianus (Backeb.) Backeb. -- not accepted
  Trichocereus smrzianus (Backeb.) F. Ritter -- not accepted
  Trichocereus tarmaensis Rauh & Backeb. -- not accepted
  Trichocereus uyupampensis Backeb. -- not accepted
  Trichocereus vollianus Backeb. -- not accepted
  Trichocereus werdermannianus Backeb. -- not accepted
  Tunilla albisaetacens (Backeb.) D.R. Hunt & Iliff -- not accepted
  Tunilla erectoclada (Backeb.) D.R. Hunt & Iliff -- accepted
  Tunilla minuscula (Backeb.) D.R. Hunt & Iliff -- not accepted
  Tunilla silvestris (Backeb.) D.R. Hunt & Iliff -- not accepted
  Turbinicarpus (Backeb.) Buxb. & Backeb. -- accepted -- top cactus
  Turbinicarpus klinkerianus Backeb. & H. Jacobsen -- not accepted
  Turbinicarpus krainzianus (Gerhart Frank) Backeb. -- not accepted
  Turbinicarpus lophophoroides (Werderm.) Buxb. & Backeb. -- accepted
  Turbinicarpus macrochele (Werderm.) Rauh & Backeb. -- not accepted
  Turbinicarpus macrochele ssp. klinkerianus (Backeb. & H. Jacobsen) Doweld -- not accepted
  Turbinicarpus pseudomacrochele (Backeb.) Rauh & Backeb. -- accepted
  Turbinicarpus pseudomacrochele ssp. pseudomacrochele (Backeb.) Rauh & Backeb. -- accepted
  Turbinicarpus pseudopectinatus (Backeb.) Glass & R.A. Foster -- accepted
  Turbinicarpus roseiflorus Backeb. -- not accepted
  Turbinicarpus schmiedickeanus (Boed.) Rauh & Backeb. -- accepted
  Turbinicarpus schmiedickeanus ssp. klinkerianus (Backeb. & H. Jacobsen) N.P. Taylor -- accepted
  Turbinicarpus schmiedickeanus ssp. schmiedickeanus (Boed.) Rauh & Backeb. -- accepted
  Turbinicarpus schmiedickeanus var. klinkerianus (Backeb. & H. Jacobsen) Glass & R.A. Foster -- not accepted
  Turbinicarpus schmiedickeanus var. schmiedickeanus (Boed.) Rauh & Backeb. -- not accepted
  Turbinicarpus schwarzii (Shurly) Backeb. -- not accepted
  Turbinicarpus subterraneus (Backeb.) A.D. Zimmerman -- accepted
  Turbinicarpus subterraneus ssp. subterraneus (Backeb.) A.D. Zimmerman -- accepted
  Turbinicarpus subterraneus var. subterraneus (Backeb.) A.D. Zimmerman -- not accepted
  Uebelmannia gummifera (Backeb. & Voll) Buining & Brederoo -- accepted
  Uebelmannia gummifera ssp. gummifera (Backeb. & Voll) Buining & Brederoo -- accepted
  Weberbauerocereus Backeb. -- accepted
  Weberbauerocereus cephalomacrostibas (Werderm. & Backeb.) F. Ritter -- accepted
  Weberbauerocereus horridispinus Rauh & Backeb. -- not accepted
  Weberbauerocereus rauhii Backeb. -- accepted
  Weberbauerocereus seyboldianus Rauh & Backeb. -- not accepted
  Weberbauerocereus weberbaueri (K. Schum.) Backeb. -- accepted
  Weingartia ambigua (Hildm. ex K. Schum.) Backeb. -- not accepted
  Weingartia breviflora (Backeb.) F.H. Brandt -- not accepted
  Weingartia chilensis (Backeb.) Backeb. -- not accepted
  Weingartia electracantha (Backeb.) F.H. Brandt -- not accepted
  Weingartia fidaiana (Backeb.) Werderm. -- not accepted
  Weingartia hediniana Backeb. -- not accepted
  Weingartia neocumingii Backeb. -- not accepted
  Weingartia neumanniana (Backeb.) Werderm. -- not accepted
  Weingartia vorwerkii (Fric) Backeb. -- not accepted
  Wigginsia stegmannii (Backeb.) D.M. Porter -- not accepted
  Wilcoxia albiflora Backeb. -- not accepted
  Wilcoxia schmollii (Weing.) Backeb. -- not accepted
  X Espostocactus mirabilis (Rauh & Backeb.) G.D. Rowley -- accepted
   

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