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⚠ Version 1 of The Plant List has been superseded.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 echinocactus horizontalonius; we will try Echinocactus instead.

990 plant name records match your search criteria Echinocactus. The results are below.

• Genus Echinocactus 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 Z

The results can also be downloaded as a CSV file.

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

Name	Status	Confi­dence level	Source
Echinocactus acanthion Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus acanthodes Lem.	Synonym		WCSP (in review)
Echinocactus acanthodes var. rostii (Britton & Rose) Munz	Synonym		WCSP (in review)
Echinocactus acanthostephes Poselg.	Unresolved		WCSP (in review)
Echinocactus aciculatus Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus acifer Hopffer ex C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus acroacanthus Stieber	Unresolved		WCSP (in review)
Echinocactus acuatus Link & Otto	Unresolved		WCSP (in review)
Echinocactus acuatus var. arechavaletae K.Schum. ex Speg.	Unresolved		WCSP (in review)
Echinocactus acuatus var. arechavaletai Speg.	Synonym		TRO
Echinocactus acuatus var. corynodes (Otto ex Pfeiff.) Speg.	Unresolved		WCSP (in review)
Echinocactus acuatus var. depressus Speg.	Unresolved		WCSP (in review)
Echinocactus acuatus var. erinaceus (Haw.) Speg.	Synonym		TRO
Echinocactus acuatus var. sellowii (Link & Otto) Speg.	Unresolved		WCSP (in review)
Echinocactus acutangulus Zucc. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus acutispinus Hildmann	Unresolved		TRO
Echinocactus acutissimus Otto & A.Dietr.	Synonym		WCSP (in review)
Echinocactus adversispinus Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus agglomeratus Karw. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus alamosanus Britton & Rose	Synonym		WCSP (in review)
Echinocactus albatus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus allardtianus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus alteolens Lem. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus alteolens (Lam. ex A.Dietr.) K.Schum.	Synonym		WCSP (in review)
Echinocactus amambayensis Werderm.	Unresolved		WCSP (in review)
Echinocactus amazonicus Witt [Unplaced]	Unresolved		WCSP (in review)
Echinocactus ambiguus Hildm. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus ancylacanthus Monv. ex Labour.	Unresolved		WCSP (in review)
Echinocactus andreae Boed.	Synonym		WCSP (in review)
Echinocactus anfractuosus Mart. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus anfractuosus var. ensiferus (Lem.) Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus anfractuosus var. pentacanthus (Lem.) Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus anisitsii K.Schum.	Synonym		WCSP (in review)
Echinocactus apricus Arechav. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus arachnoideus Scheidw.	Synonym		WCSP (in review)
Echinocactus araneifer Lem. ex Labour.	Synonym		WCSP (in review)
Echinocactus araneolarius Rchb. ex Walp. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus arechavaletae K.Schum. ex Arechav. [Illegitimate]	Unresolved		WCSP (in review)
Echinocactus arechavaletae Speg. ex Arechav.	Unresolved		WCSP (in review)
Echinocactus arizonicus R.E.Kunze	Synonym		WCSP (in review)
Echinocactus armatissimus C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus armatus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus arrectus Otto in Foerster	Unresolved		TRO
Echinocactus arrigens Link ex A.Dietr.	Unresolved		WCSP (in review)
Echinocactus arrigens var. xiphacanthus (Miq.) Schelle	Unresolved		WCSP (in review)
Echinocactus aspillagae Söhrens	Synonym		WCSP (in review)
Echinocactus asterias Zucc.	Synonym		WCSP (in review)
Echinocactus asterias var. nudus H.Moeller	Synonym		WCSP (in review)
Echinocactus asterioides (Werderm.) Werderm.	Synonym		WCSP (in review)
Echinocactus aulacogonus Lem.	Synonym		WCSP (in review)
Echinocactus aulacogonus var. diacopaulax Lem.	Synonym		WCSP (in review)
Echinocactus aurantiacus Vaupel	Unresolved		WCSP (in review)
Echinocactus auratus Pfeiff.	Synonym		WCSP (in review)
Echinocactus aureicentrua Backeb. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus aureus (Meyen) Pfeiff.	Synonym		WCSP (in review)
Echinocactus bahiensis (Britton & Rose) Luetzelb.	Synonym		WCSP (in review)
Echinocactus baldianus Speg.	Synonym		WCSP (in review)
Echinocactus barcelona Cact. Journ.	Unresolved		TRO
Echinocactus beguinii A.A.Weber ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus berteroi (Colla) Gay	Synonym		WCSP (in review)
Echinocactus bertinii (F.Cels. ex Henrincq.) A.Berger	Unresolved		WCSP (in review)
Echinocactus biceras Jacobi	Unresolved		WCSP (in review)
Echinocactus bicolor Galeotti ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus bicolor var. bolaensis (Runge) K.Schum.	Unresolved		WCSP (in review)
Echinocactus bicolor f. bolaensis (Runge) Schelle	Unresolved		WCSP (in review)
Echinocactus bicolor var. bolaensis (Runge) K. Schum.	Synonym		TRO
Echinocactus bicolor f. pottsii (Schur ex Salm-Dyck) Voss	Unresolved		WCSP (in review)
Echinocactus bicolor var. schottii Engelm.	Unresolved		WCSP (in review)
Echinocactus bicolor var. tricolor K.Schum.	Unresolved		WCSP (in review)
Echinocactus bicolor f. tricolor (K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus bodenbenderianus Hosseus ex A.Berger	Synonym		WCSP (in review)
Echinocactus bodenbenderianus Hosseus	Synonym		TRO
Echinocactus boedekerianus A.Berger	Unresolved		WCSP (in review)
Echinocactus bolaensis Runge	Unresolved		WCSP (in review)
Echinocactus bolivianus Pfeiff.	Synonym		WCSP (in review)
Echinocactus borchersii Boed.	Unresolved		WCSP (in review)
Echinocactus boutillieri Parm. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus brachyanthus Gürke	Unresolved		WCSP (in review)
Echinocactus brachycentrus Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus brachypetalus (Speg.) Werderm.	Synonym		WCSP (in review)
Echinocactus brasiliensis (Speg.) Werderm.	Synonym		WCSP (in review)
Echinocactus brevihamatus Engelm.	Unresolved		WCSP (in review)
Echinocactus brevimammus Poselg.	Unresolved		WCSP (in review)
Echinocactus bridgesii Pfeiff.	Synonym		WCSP (in review)
Echinocactus buchheimianus Haage in Quehl	Synonym		TRO
Echinocactus buekii Klein	Unresolved		WCSP (in review)
Echinocactus bulbocalyx Werderm.	Synonym		TRO
Echinocactus cachensis (Speg.) Speg.	Synonym		WCSP (in review)
Echinocactus cachetianus Labour.	Unresolved		TRO
Echinocactus caespititius Pfeiff. ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus caespitosus Speg.	Unresolved		WCSP (in review)
Echinocactus californicus Monv. ex Labour.	Synonym		WCSP (in review)
Echinocactus calochlorus Boed.	Synonym		WCSP (in review)
Echinocactus campylacanthus Scheidw.	Synonym		WCSP (in review)
Echinocactus candicans Pfeiff. [Invalid]	Unresolved		WCSP (in review)
Echinocactus candidus Lawr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus capillaense Schick	Synonym		TRO
Echinocactus capricornis A.Dietr.	Synonym		WCSP (in review)
Echinocactus capricornis var. crassispinus H.Moeller	Synonym		WCSP (in review)
Echinocactus capricornis var. minor Runge & Quehl	Synonym		WCSP (in review)
Echinocactus capricornis f. minor (Runge & Quehl) Schelle	Synonym		WCSP (in review)
Echinocactus capricornis var. niveus K.Kayser	Synonym		WCSP (in review)
Echinocactus capricornus var. aureus H.Moeller	Synonym		WCSP (in review)
Echinocactus capricornus var. senilis Fric	Synonym		WCSP (in review)
Echinocactus castaneoides Cels ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus castaniensis Miers	Unresolved		TRO
Echinocactus castaniensis F.A.C. Weber	Unresolved		TRO
Echinocactus catamarcensis Speg.	Unresolved		WCSP (in review)
Echinocactus cataphractus Dams	Synonym		WCSP (in review)
Echinocactus celsianus Labour. ex K. Schum.	Unresolved		TRO
Echinocactus centeterius Lehm. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus centeterius var. major Lem. & Monv.	Synonym		WCSP (in review)
Echinocactus cephalophorus Poselg.	Unresolved		WCSP (in review)
Echinocactus ceratistes Otto ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus cerebriformis Macloskie	Unresolved		TRO
Echinocactus cereiformis DC. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus chereaunianus Cels	Unresolved		TRO
Echinocactus chilensis Hildm. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus chilensis var. confinis Hildm.	Synonym		WCSP (in review)
Echinocactus chilensis f. confinis (Hildm.) Schelle	Synonym		WCSP (in review)
Echinocactus chionanthus Speg.	Synonym		WCSP (in review)
Echinocactus chlorophthalmus Hook.	Synonym		TRO
Echinocactus chloropthalmus Hook.	Unresolved		WCSP (in review)
Echinocactus chrysacanthion K.Schum.	Unresolved		WCSP (in review)
Echinocactus chrysacanthus Orcutt	Synonym		WCSP (in review)
Echinocactus cinerascens Salm-Dyck	Synonym		WCSP (in review)
Echinocactus cinereus Phil.	Unresolved		WCSP (in review)
Echinocactus cinnabarinus Hook.	Synonym		WCSP (in review)
Echinocactus cinnabarinus var. spinosior Salm-Dyck	Synonym		WCSP (in review)
Echinocactus clava Poselg.	Unresolved		WCSP (in review)
Echinocactus clavatus Söhrens	Unresolved		WCSP (in review)
Echinocactus clavus (Pfeiff.) Poselger	Synonym		TRO
Echinocactus coccineus Pfeiff.	Synonym		WCSP (in review)
Echinocactus colombianus Werderm.	Synonym		WCSP (in review)
Echinocactus columnaris Pfeiff.	Synonym		WCSP (in review)
Echinocactus concinnus Monv.	Unresolved		WCSP (in review)
Echinocactus concinnus var. joadii (Hook.f.) Arechav.	Unresolved		WCSP (in review)
Echinocactus concinnus var. tabularis Cels	Unresolved		WCSP (in review)
Echinocactus confertus Foerster	Unresolved		TRO
Echinocactus confusus Britton & Rose	Synonym		TRO
Echinocactus conglomeratus Phil.	Synonym		WCSP (in review)
Echinocactus conimamma Linke ex K. Schum.	Unresolved		TRO
Echinocactus conoideus (DC.) Poselg.	Unresolved		WCSP (in review)
Echinocactus conothelos Regel & E.Klein bis	Unresolved		WCSP (in review)
Echinocactus conquades Foerster	Unresolved		TRO
Echinocactus × constrictus Hildm. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus contractus Hildmann	Unresolved		TRO
Echinocactus copiapensis Pfeiff.	Synonym		WCSP (in review)
Echinocactus copoldi K. Schum.	Unresolved		TRO
Echinocactus coptonogonus Lem.	Unresolved		WCSP (in review)
Echinocactus coquimbanus Karw.	Synonym		WCSP (in review)
Echinocactus cornifer (DC.) Poselger	Synonym		TRO
Echinocactus corniferus Poselg.	Unresolved		WCSP (in review)
Echinocactus corniger Moc. & Sessé ex DC.	Synonym		TRO
Echinocactus corniger var. flavispinus Haage ex C.F. Först.	Synonym		TRO
Echinocactus corniger var. latispinus (Haw.) Voss	Synonym		TRO
Echinocactus cornigerus DC.	Synonym		WCSP (in review)
Echinocactus cornigerus var. flavispinus J.N.Haage ex C.F.Först.	Synonym		WCSP (in review)
Echinocactus cornigerus f. flavispinus (J.N.Haage ex C.F.Först.) Schelle	Synonym		WCSP (in review)
Echinocactus corrugatus (Gillies ex Loudon) Steud. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus corynacanthus Scheidw.	Synonym		WCSP (in review)
Echinocactus corynodes Otto ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus coulteri G.Don	Synonym		WCSP (in review)
Echinocactus courantianus Lem. ex Labour.	Synonym		WCSP (in review)
Echinocactus courantii Lem.	Unresolved		WCSP (in review)
Echinocactus covillei (Britton & Rose) A.Berger	Synonym		WCSP (in review)
Echinocactus coxii K.Schum.	Synonym		WCSP (in review)
Echinocactus crassihamatus F.A.C.Weber	Unresolved		WCSP (in review)
Echinocactus crenatus Pfeiff.	Synonym		WCSP (in review)
Echinocactus criocerus Lem. ex Labour. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus crispatus DC.	Unresolved		WCSP (in review)
Echinocactus cristatus Lawr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus ctenoides Lem.	Synonym		WCSP (in review)
Echinocactus cumingii Hopffer	Unresolved		WCSP (in review)
Echinocactus cumingii Regel & E.Klein bis [Illegitimate]	Unresolved		WCSP (in review)
Echinocactus cupreatus Poselg. ex Rümpler	Synonym		WCSP (in review)
Echinocactus cupulatus Foerster	Unresolved		TRO
Echinocactus curvicornis Miq.	Synonym		WCSP (in review)
Echinocactus curvispinus (Bertero) Gay	Synonym		WCSP (in review)
Echinocactus cylindraceus Engelm.	Synonym		WCSP (in review)
Echinocactus dadakii Fric	Synonym		WCSP (in review)
Echinocactus damsii K.Schum.	Synonym		WCSP (in review)
Echinocactus darrahii K. Schum.	Unresolved		TRO
Echinocactus debilispinus A.Berg [Unplaced]	Unresolved		WCSP (in review)
Echinocactus decaisnei (Lem.) Steud.	Unresolved		WCSP (in review)
Echinocactus deflexispinus Gruson in Schumann	Unresolved		TRO
Echinocactus delaetii K.Schum.	Synonym		WCSP (in review)
Echinocactus deminutus Gürke	Unresolved		TRO
Echinocactus densus Steud.	Unresolved		TRO
Echinocactus denudatus Link & Otto	Synonym		WCSP (in review)
Echinocactus denudatus var. andersohnianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. andersohnianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. anisitsii Fric	Synonym		WCSP (in review)
Echinocactus denudatus var. bruennowianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. bruennowianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. brumorviana F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus var. delaetianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. delaetianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. golzianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. heuschkehlianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. heuschkelianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus var. intermedius Hildm.	Synonym		WCSP (in review)
Echinocactus denudatus var. leheideliana F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus var. meiklejohnianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. meiklejohnianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. octogonus K.Schum.	Synonym		WCSP (in review)
Echinocactus denudatus f. octogonus (K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. paraguayensis Mundt (or Haage Jr.)	Synonym		TRO
Echinocactus denudatus var. roseiflorus Hildm. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus denudatus f. roseiflorus (Hildm. ex K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. scheidelianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. scheidelianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. wagnerianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. wagnerianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus denudatus var. wieditzianus F.Haage	Synonym		WCSP (in review)
Echinocactus denudatus f. wieditzianus (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus depressus (Haw.) DC.	Unresolved		WCSP (in review)
Echinocactus dichroacanthus Mart. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus dicracanthus Hortus ex Forbes	Unresolved		TRO
Echinocactus dietrichianus C.F.Först.	Synonym		WCSP (in review)
Echinocactus dietrichii Heynh.	Unresolved		WCSP (in review)
Echinocactus diguetii A.A.Weber	Synonym		WCSP (in review)
Echinocactus disciformis (DC.) K.Schum.	Unresolved		WCSP (in review)
Echinocactus dolichacanthus Lem.	Synonym		WCSP (in review)
Echinocactus dolichacanthus var. minor Lem.	Synonym		WCSP (in review)
Echinocactus dolichocentrus Salm-Dyck	Unresolved		TRO
Echinocactus dregeanus W.Moeller [Unplaced]	Unresolved		WCSP (in review)
Echinocactus dumelianus Cels ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus durangensis Runge	Unresolved		WCSP (in review)
Echinocactus ebenacanthus Monv. ex Labour.	Synonym		WCSP (in review)
Echinocactus ebenacanthus var. minor Labour.	Synonym		WCSP (in review)
Echinocactus echidne DC.	Synonym		WCSP (in review)
Echinocactus echidne var. gilvus (A.Dietr.) Salm-Dyck	Synonym		WCSP (in review)
Echinocactus echidne f. gilvus (A.Dietr.) K.Schum.	Synonym		WCSP (in review)
Echinocactus echinatus Forbes	Unresolved		TRO
Echinocactus echinoides Lem. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus edulis Haage ex C.F.Först. [Invalid]	Synonym		WCSP (in review)
Echinocactus ehrenbergii Pfeiff.	Unresolved		WCSP (in review)
Echinocactus elachisanthus F.A.C.Weber	Unresolved		WCSP (in review)
Echinocactus elatior Lem.	Unresolved		TRO
Echinocactus electracanthus Lem.	Synonym		WCSP (in review)
Echinocactus electracanthus var. haematacanthus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus elegans Pfeiff. [Invalid]	Unresolved		WCSP (in review)
Echinocactus elephantidens Poselg.	Unresolved		WCSP (in review)
Echinocactus ellemeetii Miq. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus ellipticus Lem.	Synonym		WCSP (in review)
Echinocactus emoryi Engelm.	Synonym		WCSP (in review)
Echinocactus emoryi var. rectispinus Engelm. ex J.M.Coult.	Synonym		WCSP (in review)
Echinocactus emoryi f. rectispinus (Engelm. ex J.M.Coult.) Schelle	Synonym		WCSP (in review)
Echinocactus ensifer Lem.	Synonym		TRO
Echinocactus ensiferus Lem.	Unresolved		WCSP (in review)
Echinocactus equitans Scheidw.	Synonym		WCSP (in review)
Echinocactus erectocentrus Coult.	Unresolved		WCSP (in review)
Echinocactus erectus Poselg.	Unresolved		WCSP (in review)
Echinocactus erinaceus (Haw.) Lem.	Unresolved		WCSP (in review)
Echinocactus × erubescens Osten [Unplaced]	Unresolved		WCSP (in review)
Echinocactus escayachensis Vaupel	Unresolved		WCSP (in review)
Echinocactus exsculptus Otto ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus exsculptus var. dichroacanthus (Mart. ex Pfeiff.) Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus exsculptus var. foveolatus (J.N.Haage ex Pfeiff.) Salm-Dyck	Synonym		WCSP (in review)
Echinocactus exsculptus var. tenuispinus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus eyriesii Turpin	Synonym		WCSP (in review)
Echinocactus eyriesii var. glaucus Lindl.	Synonym		WCSP (in review)
Echinocactus falconeri Orcutt	Synonym		WCSP (in review)
Echinocactus famatimensis Speg.	Synonym		WCSP (in review)
Echinocactus farinosus C.F.Först.	Synonym		WCSP (in review)
Echinocactus fascicularis (Meyen) Steud.	Unresolved		WCSP (in review)
Echinocactus fennellii F.A. Haage Jr. in Schumann	Unresolved		TRO
Echinocactus ferox Spreng.	Unresolved		TRO
Echinocactus fidaianus (Backeb.) Backeb.	Unresolved		WCSP (in review)
Echinocactus fiebrigii Gürke	Unresolved		WCSP (in review)
Echinocactus fiedlerianus K.Schum.	Synonym		WCSP (in review)
Echinocactus fischeri Pfeiff.	Synonym		WCSP (in review)
Echinocactus flavicoma Endl.	Unresolved		TRO
Echinocactus flavispinus Meinsh.	Synonym		WCSP (in review)
Echinocactus flavovirens Scheidw.	Synonym		WCSP (in review)
Echinocactus flexispinus Engelm.	Synonym		WCSP (in review)
Echinocactus flexispinus Salm-Dyck [Illegitimate]	Unresolved		WCSP (in review)
Echinocactus flexuosus A.Dietr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus floricomus Arechav.	Unresolved		WCSP (in review)
Echinocactus fluctuosus A.Dietr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus fobeanus Mieckley [Unplaced]	Unresolved		WCSP (in review)
Echinocactus foersteri Stieber [Unplaced]	Unresolved		WCSP (in review)
Echinocactus foliosus (Gillies ex Loudon) Steud. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus forbesii Lehm.	Synonym		WCSP (in review)
Echinocactus fordii Orcutt	Synonym		WCSP (in review)
Echinocactus formosus Pfeiff.	Synonym		WCSP (in review)
Echinocactus fossulatus Scheidw.	Unresolved		WCSP (in review)
Echinocactus foveolatus J.N.Haage ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus fricii Arechav.	Unresolved		WCSP (in review)
Echinocactus froehlichianus K.Schum.	Synonym		WCSP (in review)
Echinocactus fuscus Muehlenpf.	Synonym		WCSP (in review)
Echinocactus galeottii Scheidw.	Synonym		WCSP (in review)
Echinocactus gayanus Lem.	Synonym		WCSP (in review)
Echinocactus geissei Poselg. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus geissei var. albicans Hildm.	Synonym		WCSP (in review)
Echinocactus gemmatus Otto	Unresolved		WCSP (in review)
Echinocactus gerardii F.A.C.Weber	Synonym		WCSP (in review)
Echinocactus ghiesbrechtii Salm-Dyck	Synonym		WCSP (in review)
Echinocactus ghiesbreghtianus Lem.	Synonym		WCSP (in review)
Echinocactus gibbosus (Haw.) DC.	Synonym		WCSP (in review)
Echinocactus gibbosus var. cerebriformis Macloskie	Synonym		WCSP (in review)
Echinocactus gibbosus var. cerebriformis Speg.	Synonym		TRO
Echinocactus gibbosus var. chubutensis (Speg.) Speg.	Synonym		WCSP (in review)
Echinocactus gibbosus var. fennellii F.Haage	Synonym		WCSP (in review)
Echinocactus gibbosus f. fennellii (J.N.Haage) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. ferox Labour. ex Rümpler	Synonym		WCSP (in review)
Echinocactus gibbosus f. ferox (Labour. ex Rümpler) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. leonensis Hildm. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus gibbosus f. leonensis (Hildm. ex K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. leucacanthus Rümpler	Synonym		WCSP (in review)
Echinocactus gibbosus f. leucacanthus (Rümpler) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. leucodictyus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus gibbosus f. leucodictyus (Salm-Dyck) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. nobilis (Haw.) K.Schum.	Synonym		WCSP (in review)
Echinocactus gibbosus f. nobilis (Haw.) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. platensis (Speg.) Speg.	Synonym		WCSP (in review)
Echinocactus gibbosus var. platensis (Speg.) Lambert	Synonym		TRO
Echinocactus gibbosus var. pluricostatus Foerster	Synonym		TRO
Echinocactus gibbosus var. polygonus K.Schum.	Synonym		WCSP (in review)
Echinocactus gibbosus var. schlumbergeri Rümpler	Synonym		WCSP (in review)
Echinocactus gibbosus f. schlumbergeri (Rümpler) Schelle	Synonym		WCSP (in review)
Echinocactus gibbosus var. ventanicola Speg.	Synonym		WCSP (in review)
Echinocactus gielsdorfianus Werderm.	Unresolved		WCSP (in review)
Echinocactus gigas Pfeiffer ex Foerster	Unresolved		TRO
Echinocactus gilliesii Salm-Dyck	Unresolved		TRO
Echinocactus gilvus A.Dietr.	Synonym		WCSP (in review)
Echinocactus glabrescens F.A.C. Weber	Unresolved		TRO
Echinocactus gladiatus Link & Otto	Unresolved		WCSP (in review)
Echinocactus glanduliger Poselger	Unresolved		TRO
Echinocactus glanduligerus Poselg.	Unresolved		WCSP (in review)
Echinocactus glaucescens DC.	Synonym		WCSP (in review)
Echinocactus glaucus Karw. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus glaucus (J.A.Purpus ex K.Schum.) L.D.Benson ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus gracilis Lem.	Synonym		TRO
Echinocactus gracillimus Monv. ex Lem.	Synonym		WCSP (in review)
Echinocactus graessneri K.Schum.	Unresolved		WCSP (in review)
Echinocactus grahlianus F.Haage ex K.Schum.	Synonym		WCSP (in review)
Echinocactus grandicornis Lem.	Unresolved		WCSP (in review)
Echinocactus grandis Rose	Synonym		WCSP (in review)
Echinocactus grandis subsp. polycormus Ríha & Tabasco	Synonym		WCSP (in review)
Echinocactus grandis f. polycormus Ríha & Tabasco	Synonym		WCSP (in review)
Echinocactus griseispinus Jacobi [Unplaced]	Unresolved		WCSP (in review)
Echinocactus grossei K.Schum.	Unresolved		WCSP (in review)
Echinocactus grusonii Hildm.	Accepted		WCSP (in review)
Echinocactus guerkeanus F.Haage	Synonym		WCSP (in review)
Echinocactus guerrainanus Backeb.	Synonym		TRO
Echinocactus guyannensis Pfeiff.	Synonym		WCSP (in review)
Echinocactus haageanus (Linke) C.F.Först.	Unresolved		WCSP (in review)
Echinocactus haematacanthus (Monv. ex Salm-Dyck) Monv. ex F.A.C.Weber [Illegitimate]	Synonym		WCSP (in review)
Echinocactus haematacanthus var. crassispinus Engelm.	Synonym		WCSP (in review)
Echinocactus haematanthus Speg.	Unresolved		WCSP (in review)
Echinocactus haematochroanthus Hemsl.	Synonym		WCSP (in review)
Echinocactus hamatacanthus Muehlenpf.	Synonym		WCSP (in review)
Echinocactus hamatocanthus var. brevispinus (Engelm.) J.M.Coult.	Synonym		WCSP (in review)
Echinocactus hamatocanthus var. longihamatus (Galeotti ex C.F.Först.) J.M.Coult.	Synonym		WCSP (in review)
Echinocactus hamatus Muehlenpf.	Unresolved		WCSP (in review)
Echinocactus hamatus Forbes	Synonym		TRO
Echinocactus hamulosus Regel	Unresolved		WCSP (in review)
Echinocactus hankeanus C.F.Först.	Synonym		WCSP (in review)
Echinocactus hartmannii K.Schum.	Synonym		WCSP (in review)
Echinocactus haselbergii C.F.Först.	Unresolved		WCSP (in review)
Echinocactus hastatus Hopffer ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus hastifer Werderm. & Boed.	Unresolved		WCSP (in review)
Echinocactus haynei Otto ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus helianthodiscus Lem. ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus helophorus Lem.	Synonym		WCSP (in review)
Echinocactus helophorus var. laevior Lem.	Synonym		WCSP (in review)
Echinocactus helophorus var. longifossulatus Lem.	Synonym		WCSP (in review)
Echinocactus hemifossus Lem. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus hempelianus K. Schum.	Synonym		TRO
Echinocactus herteri Werderm.	Unresolved		WCSP (in review)
Echinocactus hertrichii Weing.	Synonym		WCSP (in review)
Echinocactus heteracanthus Muehlenpf.	Unresolved		WCSP (in review)
Echinocactus heterochromus F.A.C.Weber	Unresolved		WCSP (in review)
Echinocactus heteromorphus Poselg.	Unresolved		WCSP (in review)
Echinocactus hexacanthus Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus Lem.	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus f. fossulatus (Scheidw.) Voss	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus var. fossulatus (Scheidw.) Salm-Dyck in Labouret	Synonym		TRO
Echinocactus hexaedrophorus var. labouretianus K.Schum.	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus f. labouretianus (K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus var. major Quehl	Unresolved		WCSP (in review)
Echinocactus hexaedrophorus f. major (Quehl) Schelle	Unresolved		WCSP (in review)
Echinocactus hexaedrus Scheidw. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus heyderi A.Dietr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus histricacanthus Hemsl.	Unresolved		TRO
Echinocactus histrix DC.	Synonym		WCSP (in review)
Echinocactus hoffmannseggii K. Schum.	Unresolved		TRO
Echinocactus holopterus Miq. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus hookeri Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus horizontalis C.F.Först. [Spelling variant]	Synonym		WCSP (in review)
Echinocactus horizonthalonius Lem.	Accepted		WCSP (in review)
Echinocactus horizonthalonius var. centrispinus Engelm.	Synonym		WCSP (in review)
Echinocactus horizonthalonius f. centrispinus (Engelm.) Schelle	Synonym		WCSP (in review)
Echinocactus horizonthalonius var. curvispinus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus horizonthalonius f. curvispinus (Salm-Dyck) Schelle	Synonym		WCSP (in review)
Echinocactus horizonthalonius subsp. horizonthalonius	Accepted		TRO
Echinocactus horizonthalonius var. nicholii L.D.Benson	Synonym		WCSP (in review)
Echinocactus horizonthalonius subsp. nicholii (L.D.Benson) U.Guzmán	Accepted		WCSP (in review)
Echinocactus horizonthalonius var. obscurispinus Rud.Mey.	Synonym		WCSP (in review)
Echinocactus horizonthalonius f. obscurispinus (Rud.Mey.) Schelle	Synonym		WCSP (in review)
Echinocactus horizonthalonius var. subikii Staník & Dráb	Synonym		WCSP (in review)
Echinocactus horridus Gay	Synonym		WCSP (in review)
Echinocactus horripilus Lem. ex C.F.Först.	Unresolved		WCSP (in review)
Echinocactus horripilus (Lem.) Lem.	Synonym		TRO
Echinocactus hossei F.Haage ex A.Berger	Synonym		WCSP (in review)
Echinocactus hossei Haage	Synonym		TRO
Echinocactus humilis Phil.	Synonym		WCSP (in review)
Echinocactus humilis Rümpler	Synonym		WCSP (in review)
Echinocactus huotti F. Cels	Synonym		TRO
Echinocactus huottii Cels	Unresolved		WCSP (in review)
Echinocactus hybocentrus Lehm. ex Pfeiff. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus hybogonus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus hypocrateriformis Otto & A.Dietr.	Unresolved		WCSP (in review)
Echinocactus hyptiacanthus Lem.	Synonym		WCSP (in review)
Echinocactus hystrichacanthus Lem.	Synonym		WCSP (in review)
Echinocactus hystrichocentrus A.Berg [Unplaced]	Unresolved		WCSP (in review)
Echinocactus hystrichodes Lem.	Unresolved		TRO
Echinocactus hystrichodes Monv.	Unresolved		TRO
Echinocactus hystrix Haw.	Unresolved		WCSP (in review)
Echinocactus inflatus Gillies ex Steudel	Unresolved		TRO
Echinocactus ingens Zucc. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus ingens f. aulocogonus (Lem.) Schelle	Synonym		WCSP (in review)
Echinocactus ingens var. grandis Speg.	Synonym		TRO
Echinocactus ingens var. helophorus (Lem.) K.Schum.	Synonym		WCSP (in review)
Echinocactus ingens f. helophorus (Lem.) Schelle	Synonym		WCSP (in review)
Echinocactus ingens var. saltillensis (Poselg.) K.Schum.	Synonym		WCSP (in review)
Echinocactus ingens f. saltillensis (Poselg.) Schelle	Synonym		WCSP (in review)
Echinocactus ingens var. subinermis K.Schum.	Synonym		WCSP (in review)
Echinocactus ingens var. visnaga K. Schum.	Synonym		TRO
Echinocactus ingens f. viznaga (Hook.) Voss	Synonym		WCSP (in review)
Echinocactus ingens var. viznaga (Hook.) K.Schum.	Synonym		WCSP (in review)
Echinocactus insculptus Scheidw. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus insignis Haage Jr.	Unresolved		TRO
Echinocactus intermedius (Hildm.) Schelle	Synonym		WCSP (in review)
Echinocactus interruptus Scheidw. ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus intertextus Engelm.	Unresolved		WCSP (in review)
Echinocactus intertextus Phil. [Illegitimate]	Synonym		WCSP (in review)
Echinocactus intertextus var. dasyacanthus Engelm.	Unresolved		WCSP (in review)
Echinocactus intertextus f. dasyacanthus (Engelm.) Schelle	Unresolved		WCSP (in review)
Echinocactus intortus (Mill.) DC.	Unresolved		WCSP (in review)
Echinocactus intricatus Link & Otto [Unplaced]	Unresolved		WCSP (in review)
Echinocactus irroratus Scheidw.	Synonym		WCSP (in review)
Echinocactus islayensis C.F.Först.	Synonym		WCSP (in review)
Echinocactus jenischianus Pfeiff.	Unresolved		WCSP (in review)
Echinocactus joadii Hook.f.	Unresolved		WCSP (in review)
Echinocactus johnsonii Parry ex Engelm.	Unresolved		WCSP (in review)
Echinocactus johnsonii var. lutescens Parish	Unresolved		WCSP (in review)
Echinocactus johnsonii subsp. lutescens (Parish) A.E.Murray	Unresolved		WCSP (in review)
Echinocactus johnstonianus (Britton & Rose) Fosberg	Synonym		WCSP (in review)
Echinocactus joossensianus Boed.	Synonym		WCSP (in review)
Echinocactus jourdanianus Rebut ex Maass	Synonym		TRO
Echinocactus junori Turcz. ex Kar. & Kir.	Unresolved		TRO
Echinocactus jussianus Lem.	Unresolved		TRO
Echinocactus jussieui Monv.	Synonym		TRO
Echinocactus jussieuii Monv. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus karwinskianus Burkart	Unresolved		TRO
Echinocactus karwinskii Zucc. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus kellerianus Krainz	Synonym		TRO
Echinocactus knippelianus Quehl	Synonym		WCSP (in review)
Echinocactus knuthianus Boed.	Unresolved		WCSP (in review)
Echinocactus krausei Hildm. ex Mathsson . [Unplaced]	Unresolved		WCSP (in review)
Echinocactus krausei Hildmann ex Schumann	Synonym		TRO
Echinocactus kunzei C.F.Först.	Synonym		WCSP (in review)
Echinocactus kunzei var. brevispinosus C.F.Först.	Synonym		WCSP (in review)
Echinocactus kunzei var. rigidior Salm-Dyck	Synonym		WCSP (in review)
Echinocactus kurtzianus Gürke	Synonym		WCSP (in review)
Echinocactus labouretii Foerster	Unresolved		TRO
Echinocactus lafaldensis (Vaupel) A.Berger	Synonym		WCSP (in review)
Echinocactus lamellosus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus lancifer A.Dietr.	Unresolved		WCSP (in review)
Echinocactus lancifer Rchb. ex Walp.	Unresolved		WCSP (in review)
Echinocactus langsdorfii (Lehm.) Link & Otto	Unresolved		WCSP (in review)
Echinocactus laticostatus Engelm. & J.M.Bigelow	Synonym		WCSP (in review)
Echinocactus latispinosus Link & Otto	Unresolved		TRO
Echinocactus latispinus (Haw.) Hemsl.	Synonym		WCSP (in review)
Echinocactus latispinus var. flavispinus (J.N.Haage) F.A.C.Weber	Synonym		WCSP (in review)
Echinocactus lecchii (Colla) G.Don	Unresolved		WCSP (in review)
Echinocactus lecontei Engelm.	Synonym		WCSP (in review)
Echinocactus leeanus Hook.	Synonym		WCSP (in review)
Echinocactus lemairei Monv. ex Lem.	Unresolved		WCSP (in review)
Echinocactus lenninghausii (F.Haage) K.Schum.	Synonym		WCSP (in review)
Echinocactus leonensis Cels in Schumann	Unresolved		TRO
Echinocactus leonensis K. Schum.	Unresolved		TRO
Echinocactus leopoldii E.Morren	Synonym		WCSP (in review)
Echinocactus leptanthus K.Schmidt	Synonym		WCSP (in review)
Echinocactus leptanthus Speg.	Synonym		TRO
Echinocactus leucacanthus Zucc. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus leucanthus (Pfeiff.) Gillies ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus leucocarpus Arechav.	Unresolved		WCSP (in review)
Echinocactus leucodictyus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus leucotrichus Phil.	Unresolved		WCSP (in review)
Echinocactus lewinii Henn.	Unresolved		WCSP (in review)
Echinocactus lewisii (Henn.) K.Schum.	Unresolved		WCSP (in review)
Echinocactus limitus Engelm. ex J.M.Coult.	Synonym		WCSP (in review)
Echinocactus lindheimeri Engelm. & A.Gray	Synonym		WCSP (in review)
Echinocactus lindleya C.F.Först.	Unresolved		WCSP (in review)
Echinocactus lindleyi Foerster	Synonym		TRO
Echinocactus linkeanus A.Dietr. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus linkii (Lehm.) Pfeiff.	Unresolved		WCSP (in review)
Echinocactus lloydii (Britton & Rose) A.Berger	Unresolved		WCSP (in review)
Echinocactus longihamatus Galeotti ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus longihamatus Galeotti	Synonym		TRO
Echinocactus longihamatus var. brevispinus Engelm.	Synonym		WCSP (in review)
Echinocactus longihamatus f. brevispinus (Engelm.) Schelle	Synonym		WCSP (in review)
Echinocactus longihamatus var. crassispinus Engelm.	Synonym		WCSP (in review)
Echinocactus longihamatus var. gracilispinus Engelm.	Synonym		WCSP (in review)
Echinocactus longihamatus var. sinuatus (A.Dietr.) F.A.C.Weber ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus longihamatus f. sinuatus (A.Dietr.) Schelle	Unresolved		WCSP (in review)
Echinocactus longispinus Scheidweiler in Foerster	Unresolved		TRO
Echinocactus lophothele Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus loricatus Poselg.	Unresolved		WCSP (in review)
Echinocactus loricatus Speg. [Illegitimate]	Synonym		WCSP (in review)
Echinocactus lutens Britton & Rose [Unplaced]	Unresolved		WCSP (in review)
Echinocactus maassii Heese	Unresolved		WCSP (in review)
Echinocactus macdowellii Orcutt	Unresolved		WCSP (in review)
Echinocactus macdowellii Rebut	Unresolved		WCSP (in review)
Echinocactus mackieanus Hook.	Synonym		WCSP (in review)
Echinocactus macleanii Hemsl.	Unresolved		TRO
Echinocactus macracanthus de Vriese	Synonym		WCSP (in review)
Echinocactus macracanthus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus macrocephalus Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus macrochele Werderm.	Unresolved		WCSP (in review)
Echinocactus macrodiscus Mart.	Synonym		WCSP (in review)
Echinocactus macrodiscus var. multiflorus Rud.Mey.	Synonym		WCSP (in review)
Echinocactus macrodiscus f. multiflorus (Rud.Mey.) Schelle	Synonym		WCSP (in review)
Echinocactus macromeris Poselg.	Unresolved		WCSP (in review)
Echinocactus macrothele Poselg.	Unresolved		WCSP (in review)
Echinocactus macrothele var. biglandulosus (Pfeiff.) Poselger	Synonym		TRO
Echinocactus maelenii Salm-Dyck ex C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus maldonadensis Herter	Unresolved		WCSP (in review)
Echinocactus malletianus Lem. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus mamillosus Lem.	Unresolved		TRO
Echinocactus mammillarioides Hook.	Synonym		WCSP (in review)
Echinocactus mammillifer Miq. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus mammulosus Lem.	Unresolved		WCSP (in review)
Echinocactus mammulosus var. pampeanus (Speg.) Speg.	Synonym		TRO
Echinocactus mandragora Fric ex A.Berger	Unresolved		WCSP (in review)
Echinocactus marginatus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus mariposensis (Hester) Weniger	Unresolved		WCSP (in review)
Echinocactus marisianus Galeotti ex K. Schum.	Unresolved		TRO
Echinocactus marquinatus Salm-Dyck	Unresolved		TRO
Echinocactus martinii Cels ex Schumann	Unresolved		TRO
Echinocactus mathsonii A.Berger ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus mazanensis Backeb. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus megalothelon Sencke ex K.Schum.	Synonym		WCSP (in review)
Echinocactus megapotamicus Osten [Unplaced]	Unresolved		WCSP (in review)
Echinocactus megarrhizus Rose [Unplaced]	Unresolved		WCSP (in review)
Echinocactus melanacanthus Monv.	Unresolved		TRO
Echinocactus melanocarpus Arechav.	Synonym		WCSP (in review)
Echinocactus melanochnus Cels ex Labour.	Synonym		WCSP (in review)
Echinocactus melmsianus Wegener	Unresolved		WCSP (in review)
Echinocactus melocactiformis DC.	Synonym		WCSP (in review)
Echinocactus melocactoides Lem.	Synonym		WCSP (in review)
Echinocactus meonacanthus Link & Otto	Synonym		WCSP (in review)
Echinocactus merckeri Hildmann	Unresolved		TRO
Echinocactus mesae-verdae (Boissev. & C.Davidson ex Marshall & Bloc) L.D.Benson	Unresolved		WCSP (in review)
Echinocactus mexicanus (Glass & W.A.Fitz Maur.) Halda	Synonym		WCSP (in review)
Echinocactus microspermus F.A.C.Weber	Unresolved		WCSP (in review)
Echinocactus microspermus var. erythranthus Speg.	Synonym		TRO
Echinocactus microspermus var. macrancistrus K.Schum.	Unresolved		WCSP (in review)
Echinocactus mihanovichii Fric & Gürke	Synonym		WCSP (in review)
Echinocactus minax Lem.	Synonym		WCSP (in review)
Echinocactus minax var. laevior Lem.	Synonym		WCSP (in review)
Echinocactus minusculus (K.Schum.) F.A.C.Weber	Synonym		WCSP (in review)
Echinocactus mirbelii Lem.	Synonym		WCSP (in review)
Echinocactus misleyi Clos	Synonym		WCSP (in review)
Echinocactus mitis Phil.	Unresolved		WCSP (in review)
Echinocactus molendensis Vaupel	Unresolved		WCSP (in review)
Echinocactus montevidensis C.F.Först.	Synonym		WCSP (in review)
Echinocactus monvillei Lem.	Synonym		WCSP (in review)
Echinocactus mostii Gürke	Synonym		WCSP (in review)
Echinocactus muehlenpfordtii J.H.Fennell	Unresolved		WCSP (in review)
Echinocactus muehlenpfordtii Poselg.	Unresolved		WCSP (in review)
Echinocactus multangularis Voigt ex Schumann	Unresolved		TRO
Echinocactus multicostatus Hildm. ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus multiflorus Hook.	Synonym		WCSP (in review)
Echinocactus multiflorus var. albispinus K.Schum.	Synonym		WCSP (in review)
Echinocactus multiflorus f. albispinus (K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus multiflorus var. hybopleurus K.Schum.	Synonym		WCSP (in review)
Echinocactus multiflorus var. parisiensis K.Schum.	Synonym		WCSP (in review)
Echinocactus multiflorus f. parisiensis (K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus multiplex Pfeiff.	Synonym		WCSP (in review)
Echinocactus muricatus Link & Otto ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus mutabilis C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus myriacanthus Vaupel	Unresolved		WCSP (in review)
Echinocactus myriostigma Salm-Dyck	Synonym		WCSP (in review)
Echinocactus myriostigma subsp. coahuilensis H.Moeller	Synonym		WCSP (in review)
Echinocactus myriostigma var. coahuilensis Moeller	Synonym		TRO
Echinocactus myriostigma var. columnaris K.Schum.	Synonym		WCSP (in review)
Echinocactus myriostigma f. columnaris (K.Schum.) Schelle	Synonym		WCSP (in review)
Echinocactus myriostigma var. nuda R. Meyer	Synonym		TRO
Echinocactus myriostigma var. nudus Rud.Mey.	Synonym		WCSP (in review)
Echinocactus myriostigma subsp. potosinus H.Moeller	Synonym		WCSP (in review)
Echinocactus myriostigma var. quadricostatus H.Moeller	Synonym		WCSP (in review)
Echinocactus myriostigma subsp. quadricostatus H.Moeller	Synonym		WCSP (in review)
Echinocactus napinus Phil. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus netrelianus Monv. ex Labour.	Synonym		WCSP (in review)
Echinocactus neumannianus Labour.	Synonym		WCSP (in review)
Echinocactus neumannianus Backeb.	Synonym		TRO
Echinocactus nidulans Quehl	Unresolved		WCSP (in review)
Echinocactus nidus Söhrens	Synonym		WCSP (in review)
Echinocactus niger Salm-Dyck	Synonym		WCSP (in review)
Echinocactus nigricans (Linke) D.Dietr. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus nigrispinus K.Schum.	Unresolved		WCSP (in review)
Echinocactus nobilis Haw. [Illegitimate]	Unresolved		WCSP (in review)
Echinocactus nobilis (L.) Druce	Synonym		WCSP (in review)
Echinocactus nodosus Hemsl.	Unresolved		WCSP (in review)
Echinocactus nummularioides Steud.	Unresolved		TRO
Echinocactus obrepandus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus obvallatus DC.	Unresolved		WCSP (in review)
Echinocactus obvallatus var. lancifer (A.Dietr.) Schelle	Unresolved		WCSP (in review)
Echinocactus occultus Phil.	Synonym		WCSP (in review)
Echinocactus ochroleucus Jacobi [Unplaced]	Unresolved		WCSP (in review)
Echinocactus octacanthus Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus octogonus G.Don	Synonym		WCSP (in review)
Echinocactus odieri Lem. ex Salm-Dyck.	Unresolved		WCSP (in review)
Echinocactus odieri var. mebbesii Hildm. ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus odieri f. mebbesii (Hildm. ex K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus odierianus Monv.	Unresolved		TRO
Echinocactus olacogonus Audot	Unresolved		TRO
Echinocactus oligacanthus Mart. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus oligacanthus Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus orcuttii Engelm. ex Orcutt	Synonym		WCSP (in review)
Echinocactus oreptilis Haage in Foerster	Unresolved		TRO
Echinocactus ornatus DC.	Synonym		WCSP (in review)
Echinocactus ornatus var. glabrescens F.A.C.Weber	Synonym		WCSP (in review)
Echinocactus ornatus f. glabrescens (F.A.C.Weber) Schelle	Synonym		WCSP (in review)
Echinocactus ornatus var. glabrescens K. Schum.	Synonym		TRO
Echinocactus orthacanthus Link & Otto	Unresolved		WCSP (in review)
Echinocactus ottonianus Poselg.	Unresolved		WCSP (in review)
Echinocactus ottonis (Lehm.) Link & Otto	Unresolved		WCSP (in review)
Echinocactus ottonis f. brasiliensis (F.Haage) Schelle	Unresolved		WCSP (in review)
Echinocactus ottonis var. brasiliensis F.Haage	Unresolved		WCSP (in review)
Echinocactus ottonis f. tenuispinus (Link & Otto) Schelle	Unresolved		WCSP (in review)
Echinocactus ottonis var. tenuispinus (Link & Otto) Pfeiff.	Synonym		TRO
Echinocactus ottonis var. tortuosus (Link & Otto) K.Schum.	Unresolved		WCSP (in review)
Echinocactus ottonis f. tortuosus (Link & Otto) Schelle	Unresolved		WCSP (in review)
Echinocactus ottonis var. uruguayus Arechav.	Synonym		WCSP (in review)
Echinocactus ourselianus Cels ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus oxyacanthus Forbes	Unresolved		TRO
Echinocactus oxygonus Link	Synonym		WCSP (in review)
Echinocactus oxypterus Zucc. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus pachycentrus Lehm. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus pachycornis Muehlenpf.	Synonym		WCSP (in review)
Echinocactus palmeri Rose	Synonym		WCSP (in review)
Echinocactus pampeanus Speg.	Unresolved		WCSP (in review)
Echinocactus papyracanthus (Engelm.) Engelm.	Unresolved		WCSP (in review)
Echinocactus paraguayensis K.Schum.	Synonym		WCSP (in review)
Echinocactus parryi Engelm.	Accepted		WCSP (in review)
Echinocactus parviflorus (Clover & Jotter) L.D.Benson	Unresolved		WCSP (in review)
Echinocactus parvispinus (Haw.) DC.	Unresolved		WCSP (in review)
Echinocactus pauciareolatus Arechav.	Unresolved		WCSP (in review)
Echinocactus pectinatus Scheidw.	Synonym		WCSP (in review)
Echinocactus pectinifer Lem.	Unresolved		TRO
Echinocactus pectiniferus Lem.	Synonym		WCSP (in review)
Echinocactus pectiniferus var. laevior Lem.	Synonym		WCSP (in review)
Echinocactus peeblesianus (Croizat) L.D.Benson	Unresolved		WCSP (in review)
Echinocactus pelachicus Markgr.	Unresolved		TRO
Echinocactus peninsulae Engelm. ex J.M.Coult.	Synonym		WCSP (in review)
Echinocactus peninsulae A.A.Weber	Synonym		WCSP (in review)
Echinocactus pentacanthus Lem.	Unresolved		WCSP (in review)
Echinocactus pentlandii Hook.	Synonym		WCSP (in review)
Echinocactus pepinianus K.Schum. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus peruvianus K.Schum.	Unresolved		WCSP (in review)
Echinocactus pfeifferi Zucc. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus pfersdorffii Schelle	Synonym		WCSP (in review)
Echinocactus pflanzii Vaupel	Synonym		WCSP (in review)
Echinocactus philippii (Regel & Schmidt) K.Schum.	Synonym		WCSP (in review)
Echinocactus phyllacanthoides Lem.	Unresolved		WCSP (in review)
Echinocactus phyllacanthus Mart.	Unresolved		WCSP (in review)
Echinocactus phyllacanthus var. tricuspidatus Foerster	Synonym		TRO
Echinocactus phyllantoides Lem.	Unresolved		WCSP (in review)
Echinocactus phymatothele Poselger ex Rumpler	Synonym		TRO
Echinocactus phymatothelos Poselg. ex Rümpler	Unresolved		WCSP (in review)
Echinocactus pilifer Lem.	Unresolved		TRO
Echinocactus piliferus Lem. ex Labour.	Synonym		WCSP (in review)
Echinocactus pilosus Galeotti ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus pilosus var. pringlei Coult.	Synonym		WCSP (in review)
Echinocactus pilosus var. stainesii Salm-Dyck	Synonym		WCSP (in review)
Echinocactus pilosus f. stainesii (Salm-Dyck) Voss	Synonym		WCSP (in review)
Echinocactus placentiformis (Lehm.) K.Schum.	Synonym		WCSP (in review)
Echinocactus plaschnickii Poselg.	Unresolved		WCSP (in review)
Echinocactus platensis Speg.	Synonym		WCSP (in review)
Echinocactus platensis var. guerkeanus (Heese) Speg.	Synonym		WCSP (in review)
Echinocactus platensis var. leptanthus Speg.	Synonym		WCSP (in review)
Echinocactus platensis var. parvulus Speg.	Synonym		WCSP (in review)
Echinocactus platensis var. quehlianus Speg.	Synonym		TRO
Echinocactus platensis var. terweemeanus Teucq ex Duursma	Synonym		WCSP (in review)
Echinocactus platyacanthus Link & Otto	Accepted		WCSP (in review)
Echinocactus platyacanthus f. grandis (Rose) Bravo	Synonym		WCSP (in review)
Echinocactus platyacanthus var. palmeri (Rose) H.P.Kelsey & Dayton	Synonym		WCSP (in review)
Echinocactus platyacanthus f. visnaga (Hook.) Bravo	Synonym		WCSP (in review)
Echinocactus platycarpus Foerster	Unresolved		TRO
Echinocactus platycephalus Muehlenpf.	Synonym		WCSP (in review)
Echinocactus platyceras Lem.	Synonym		WCSP (in review)
Echinocactus plicatilis Irmsch.	Unresolved		TRO
Echinocactus pluricostatus Gagnep.	Unresolved		TRO
Echinocactus polyacanthus Link & Otto	Unresolved		WCSP (in review)
Echinocactus polyancistrus Engelm. & J.M.Bigelow [Unplaced]	Unresolved		WCSP (in review)
Echinocactus polycephalus Engelm. & J.M.Bigelow	Accepted		WCSP (in review)
Echinocactus polycephalus var. flavispina F.Haage	Synonym		WCSP (in review)
Echinocactus polycephalus var. xeranthemoides J.M.Coult.	Synonym		WCSP (in review)
Echinocactus polycephalus subsp. xeranthemoides (J.M.Coult.) N.P.Taylor	Accepted		WCSP (in review)
Echinocactus polyocentrus Lem. ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus polyraphis Pfeiff. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus polyraphis Pfeiffer in Forster	Synonym		TRO
Echinocactus porrectus Lem. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus poselgerianus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus pottsianus Poselg.	Unresolved		WCSP (in review)
Echinocactus pottsii Schur ex Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus pottsii Salm-Dyck	Synonym		WCSP (in review)
Echinocactus praegnacanthus C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus pringlei (Coult.) Rose	Synonym		WCSP (in review)
Echinocactus prolifer Backeb.	Synonym		WCSP (in review)
Echinocactus pruinosus Otto ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus pseudocereus Meinsh. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus pseudominusculus Speg.	Synonym		WCSP (in review)
Echinocactus pubispinus Engelm.	Unresolved		WCSP (in review)
Echinocactus pulchellus Mart.	Synonym		WCSP (in review)
Echinocactus pulcherrimus Arechav.	Unresolved		WCSP (in review)
Echinocactus pulverulentus Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus pumilus Lem.	Synonym		WCSP (in review)
Echinocactus punctulatus Kitag.	Unresolved		TRO
Echinocactus purpureus Y.C. Chu	Unresolved		TRO
Echinocactus pycnacanthus Poselg.	Unresolved		WCSP (in review)
Echinocactus pycnoxyphus Lem.	Synonym		WCSP (in review)
Echinocactus pygmaeus Speg.	Synonym		WCSP (in review)
Echinocactus pygmaeus var. phaeodiscus Speg.	Synonym		WCSP (in review)
Echinocactus pyramidalis Pfeiff. [Invalid]	Unresolved		WCSP (in review)
Echinocactus pyramidatus C.F.Först. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus quadrinatus Wegener [Unplaced]	Unresolved		WCSP (in review)
Echinocactus quehlianus F.Haage ex H.Quehl	Synonym		WCSP (in review)
Echinocactus radiatus Pfeiff.	Unresolved		WCSP (in review)
Echinocactus radicans Poselg.	Unresolved		WCSP (in review)
Echinocactus radiosus Poselg.	Unresolved		WCSP (in review)
Echinocactus rafaelensis J.A.Purpus	Synonym		WCSP (in review)
Echinocactus rapa Fisch. & C.A.Mey. ex Regel. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus raphidacanthus Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus raphidacanthus Poselg.	Unresolved		WCSP (in review)
Echinocactus raphidocentrus Jacobi [Unplaced]	Unresolved		WCSP (in review)
Echinocactus rebutii F.A.C. Weber	Unresolved		TRO
Echinocactus rectispinus (Engelm.) Britton & Rose	Synonym		WCSP (in review)
Echinocactus recurvus (Mill.) Link & Otto	Synonym		WCSP (in review)
Echinocactus recurvus var. latispinus (Haw.) Mittl.	Synonym		WCSP (in review)
Echinocactus recurvus var. solenacanthus (Scheidw.) Salm-Dyck	Synonym		WCSP (in review)
Echinocactus recurvus f. solenacanthus (Scheidw.) Schelle	Synonym		WCSP (in review)
Echinocactus recurvus var. spiralis (Karw. ex Pfeiff.) K.Schum.	Unresolved		WCSP (in review)
Echinocactus recurvus f. spiralis (Karw. ex Pfeiff.) Schelle	Unresolved		WCSP (in review)
Echinocactus recurvus var. tricuspidatus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus reductus K.Schum.	Synonym		WCSP (in review)
Echinocactus reichei K.Schum.	Synonym		WCSP (in review)
Echinocactus reichenbachii Terscheck	Synonym		WCSP (in review)
Echinocactus rettigii Quehl	Unresolved		WCSP (in review)
Echinocactus retusus Scheidweiler in Foerster	Unresolved		TRO
Echinocactus rhodacanthus Salm-Dyck	Synonym		WCSP (in review)
Echinocactus rhodantherus Boed.	Synonym		WCSP (in review)
Echinocactus rhodanthus Forbes	Unresolved		TRO
Echinocactus rhodophthalmus Hook. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus rhodophthalmus var. ellipticus Hook.	Synonym		WCSP (in review)
Echinocactus rinconensis Poselg. ex C.F.Först.	Unresolved		WCSP (in review)
Echinocactus rinconensis Poselger	Synonym		TRO
Echinocactus ritteri Boed. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus robustus Otto ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus robustus Link & Otto	Synonym		TRO
Echinocactus robustus var. monstruosus Pfeiff.	Synonym		WCSP (in review)
Echinocactus robustus var. prolifer Pfeiff.	Synonym		WCSP (in review)
Echinocactus rosaceus Otto	Unresolved		TRO
Echinocactus roseanus Boed.	Synonym		WCSP (in review)
Echinocactus rostii (Britton & Rose) A.Berger	Synonym		WCSP (in review)
Echinocactus rostratus Jacobi	Synonym		WCSP (in review)
Echinocactus rotherianus F.Haage ex H.Quehl [Unplaced]	Unresolved		WCSP (in review)
Echinocactus rubrispinus Ford ex Orcutt	Synonym		WCSP (in review)
Echinocactus rufispinus Bertol.	Unresolved		WCSP (in review)
Echinocactus saglionis Cels	Synonym		WCSP (in review)
Echinocactus salinensis Poselg. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus salm-dyckianus Pfeiff.	Synonym		WCSP (in review)
Echinocactus salm-dyckianus Poselg.	Unresolved		WCSP (in review)
Echinocactus salmianus Link & Otto	Unresolved		WCSP (in review)
Echinocactus salmii Jacobi [Unplaced]	Unresolved		WCSP (in review)
Echinocactus salpigophorus Pfeiff. ex Labour.	Unresolved		WCSP (in review)
Echinocactus salpingophora Labour.	Unresolved		TRO
Echinocactus saltensis Speg.	Synonym		WCSP (in review)
Echinocactus saltillensis Poselg.	Synonym		WCSP (in review)
Echinocactus saltillensis Glaz.	Synonym		TRO
Echinocactus sandillon Gay	Synonym		WCSP (in review)
Echinocactus sanguiniflorus Werderm.	Synonym		WCSP (in review)
Echinocactus sanjuanensis Speg.	Synonym		WCSP (in review)
Echinocactus santa-maria Rose ex Schick [Invalid]	Unresolved		WCSP (in review)
Echinocactus saueri Boed.	Unresolved		WCSP (in review)
Echinocactus saussieri F.A.C.Weber	Unresolved		WCSP (in review)
Echinocactus scheeri Salm-Dyck	Unresolved		WCSP (in review)
Echinocactus scheeri var. brevihamatus (Engelm.) K.Schum.	Unresolved		WCSP (in review)
Echinocactus schickendantzii F.A.C.Weber	Synonym		WCSP (in review)
Echinocactus schilinzkyanus F.Haage ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus schlechtendalii Poselg.	Unresolved		WCSP (in review)
Echinocactus schlumbergeri Cels in Schumann	Unresolved		TRO
Echinocactus schmiedickeanus Boed.	Unresolved		WCSP (in review)
Echinocactus schottii Small	Unresolved		WCSP (in review)
Echinocactus schumannianus Nicolai	Unresolved		WCSP (in review)
Echinocactus schwebsianus Werderm.	Unresolved		WCSP (in review)
Echinocactus sclerothrix Lehm. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus scopa Link & Otto	Unresolved		WCSP (in review)
Echinocactus scopa var. albicans Arechav.	Unresolved		WCSP (in review)
Echinocactus scopa f. albicans (Arechav.) Schelle	Unresolved		WCSP (in review)
Echinocactus scopa var. candidus Pfeiff.	Unresolved		WCSP (in review)
Echinocactus scopa f. candidus (Pfeiff.) Schelle	Unresolved		WCSP (in review)
Echinocactus sellowianus Pfeiff.	Unresolved		WCSP (in review)
Echinocactus sellowii Link & Otto	Unresolved		WCSP (in review)
Echinocactus sellowii var. courantii (Lem.) Gürke	Unresolved		WCSP (in review)
Echinocactus sellowii var. macracanthus Arechav.	Unresolved		WCSP (in review)
Echinocactus sellowii f. macracanthus (Arechav.) Schelle	Unresolved		WCSP (in review)
Echinocactus sellowii var. macrogonus Arechav.	Unresolved		WCSP (in review)
Echinocactus sellowii f. macrogonus (Arechav.) Schelle	Unresolved		WCSP (in review)
Echinocactus sellowii f. tetracanthus (Lem.) Schelle	Unresolved		WCSP (in review)
Echinocactus sellowii var. turbinatus Arechav.	Unresolved		WCSP (in review)
Echinocactus sellowii f. turbinatus (Arechav.) Schelle	Unresolved		WCSP (in review)
Echinocactus senilis (Haw.) Beaton	Synonym		WCSP (in review)
Echinocactus senilis Phil. [Illegitimate]	Synonym		WCSP (in review)
Echinocactus sessiliflorus Mackie	Unresolved		WCSP (in review)
Echinocactus sessiliflorus Pfeiff. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus sessiliflorus var. tetracanthus (Lem.) Monv. ex Lem.	Unresolved		WCSP (in review)
Echinocactus setispinus Engelm.	Unresolved		WCSP (in review)
Echinocactus setispinus var. cachetianus Labour.	Unresolved		WCSP (in review)
Echinocactus setispinus f. cachetianus (Labour.) Schelle	Unresolved		WCSP (in review)
Echinocactus setispinus var. hamatus (Muehlenpf.) Engelm.	Unresolved		WCSP (in review)
Echinocactus setispinus f. hamatus (Muehlenpf.) Schelle	Unresolved		WCSP (in review)
Echinocactus setispinus var. longihamatus (Galeotti) Poselger	Synonym		TRO
Echinocactus setispinus var. mierensis K.Schum.	Unresolved		WCSP (in review)
Echinocactus setispinus f. mierensis (K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus setispinus var. muehlenpfordtii (J.H.Fennell) J.M.Coult.	Unresolved		WCSP (in review)
Echinocactus setispinus var. orcuttii K.Schum.	Unresolved		WCSP (in review)
Echinocactus setispinus f. orcuttii (K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus setispinus var. sinuatus (A.Dietr.) Poselg.	Unresolved		WCSP (in review)
Echinocactus setosus Hemsl.	Synonym		WCSP (in review)
Echinocactus sickmannii Guill.	Unresolved		TRO
Echinocactus sigelianus Schick ex A.Berger	Unresolved		WCSP (in review)
Echinocactus sileri Engelm. ex J.M.Coult.	Unresolved		WCSP (in review)
Echinocactus similis Poselg.	Unresolved		WCSP (in review)
Echinocactus simpsonii Engelm.	Unresolved		WCSP (in review)
Echinocactus simpsonii var. minor Engelm.	Unresolved		WCSP (in review)
Echinocactus simpsonii f. minor (Engelm.) Schelle	Unresolved		WCSP (in review)
Echinocactus simpsonii var. robustior J.M.Coult.	Unresolved		WCSP (in review)
Echinocactus sinuatus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus smithii Muehlenpf.	Unresolved		WCSP (in review)
Echinocactus soebrensii K.Schum.	Synonym		WCSP (in review)
Echinocactus soehrensii K. Schum.	Unresolved		TRO
Echinocactus solenacanthus Scheidw.	Synonym		WCSP (in review)
Echinocactus sparathacanthus Mart. in Foerster	Unresolved		TRO
Echinocactus spectabilis Pfeiff.	Unresolved		TRO
Echinocactus spegazzinii F.A.C.Weber ex Speg.	Synonym		WCSP (in review)
Echinocactus sphacelatus Poselg.	Unresolved		WCSP (in review)
Echinocactus sphaerocephalus Muehlenpf.	Unresolved		WCSP (in review)
Echinocactus spina-christi Zucc. ex Pfeiff.	Synonym		WCSP (in review)
Echinocactus spiniflorus K.Schum.	Synonym		WCSP (in review)
Echinocactus spinosior Brandegee ex Purpus	Unresolved		TRO
Echinocactus spinosissimus Forbes	Unresolved		TRO
Echinocactus spinosus Wegener	Unresolved		WCSP (in review)
Echinocactus spiralis Karw. ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus spiralis var. stellaris (Hemsl.) Salm-Dyck	Synonym		WCSP (in review)
Echinocactus stainesii Hook. ex Salm-Dyck	Synonym		WCSP (in review)
Echinocactus stainesii Hook.	Synonym		TRO
Echinocactus staplesiae Tate	Synonym		WCSP (in review)
Echinocactus steinmannii Solms	Unresolved		WCSP (in review)
Echinocactus stellaris Hemsl.	Synonym		WCSP (in review)
Echinocactus stellatus Scheidw.	Synonym		WCSP (in review)
Echinocactus stellatus Speg.	Synonym		WCSP (in review)
Echinocactus stenocarpus K.Schum.	Synonym		WCSP (in review)
Echinocactus stenogonus K.Schum.	Unresolved		WCSP (in review)
Echinocactus strausianus K.Schum.	Synonym		WCSP (in review)
Echinocactus streptocaulon Hook.	Synonym		WCSP (in review)
Echinocactus strobiliformis Poselg.	Unresolved		WCSP (in review)
Echinocactus stuckertii Speg.	Synonym		WCSP (in review)
Echinocactus stuemeri Werderm.	Unresolved		WCSP (in review)
Echinocactus stuemeri var. tilcarensis Werderm. & Backeb.	Unresolved		WCSP (in review)
Echinocactus subgibbosus Haw.	Synonym		WCSP (in review)
Echinocactus subglaucus Rydb.	Unresolved		WCSP (in review)
Echinocactus subgrandicornis Haage in Foerster	Unresolved		TRO
Echinocactus submammulosus Lem.	Synonym		WCSP (in review)
Echinocactus subniger Poselg. ex C.F.Först. & Rümpler [Unplaced]	Unresolved		WCSP (in review)
Echinocactus subnudus (Britton & Rose) Luetzelb.	Synonym		WCSP (in review)
Echinocactus subporrectus Lem.	Unresolved		WCSP (in review)
Echinocactus subterraneus Backeb.	Unresolved		WCSP (in review)
Echinocactus subulifer Link & Otto	Unresolved		TRO
Echinocactus subuliferus Link & Otto	Synonym		WCSP (in review)
Echinocactus sulcatus Pfeiff.	Synonym		WCSP (in review)
Echinocactus sulcolanatus Poselg.	Unresolved		WCSP (in review)
Echinocactus sulphureus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus supertextus Pfeiff.	Synonym		WCSP (in review)
Echinocactus sutterianus Schick ex A.Berger	Unresolved		WCSP (in review)
Echinocactus tabularis (Cels) Cels ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus taltalensis Werderm.	Synonym		WCSP (in review)
Echinocactus tellii auct. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus tellii A.Berger	Unresolved		WCSP (in review)
Echinocactus tellii Berger	Synonym		TRO
Echinocactus tenuiflorus Link	Unresolved		TRO
Echinocactus tenuispinus Link & Otto	Unresolved		WCSP (in review)
Echinocactus tephracanthus Link & Otto	Unresolved		WCSP (in review)
Echinocactus teretispinus Lem. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus terscheckii Rchb. ex Terscheck	Unresolved		WCSP (in review)
Echinocactus tetracanthus Lem.	Unresolved		WCSP (in review)
Echinocactus tetracentrus Lem. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus tetraxiphus Otto ex K.Schum.	Unresolved		WCSP (in review)
Echinocactus texensis Hopffer	Accepted		WCSP (in review)
Echinocactus texensis var. gourgensii Cels ex Labouret	Synonym		TRO
Echinocactus theiacanthus Lem.	Synonym		WCSP (in review)
Echinocactus theionacanthus Lem.	Synonym		WCSP (in review)
Echinocactus thelephorus Hortus in Forbes	Unresolved		TRO
Echinocactus theloideus Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus thionanthus Speg.	Synonym		WCSP (in review)
Echinocactus thrincogonos Lem.	Synonym		WCSP (in review)
Echinocactus thrincogonus var. elatior Lem.	Synonym		WCSP (in review)
Echinocactus tortuosus Link & Otto	Unresolved		WCSP (in review)
Echinocactus tortus Scheidw.	Synonym		WCSP (in review)
Echinocactus towensis Cels in Schumann	Unresolved		TRO
Echinocactus treculianus Labour.	Synonym		WCSP (in review)
Echinocactus tribolacanthus Monv. ex Labour. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus tricolor (K.Schum.) Schelle	Unresolved		WCSP (in review)
Echinocactus tricornis Monv. ex A.Dietr.	Synonym		WCSP (in review)
Echinocactus tricuspidatus Scheidw.	Unresolved		WCSP (in review)
Echinocactus trifurcatus Jacobi [Unplaced]	Unresolved		WCSP (in review)
Echinocactus trollietii Rebut	Unresolved		WCSP (in review)
Echinocactus tuberculatus Link & Otto	Synonym		WCSP (in review)
Echinocactus tuberculatus var. spiralis DC.	Synonym		WCSP (in review)
Echinocactus tuberisulcatus Jacobi	Synonym		WCSP (in review)
Echinocactus tuberosus Salm-Dyck ex C.F.Först.	Unresolved		WCSP (in review)
Echinocactus tubiflorus (Pfeiff.) Hook.	Unresolved		WCSP (in review)
Echinocactus tulensis Poselg.	Unresolved		WCSP (in review)
Echinocactus turbinatus Pfeiff.	Synonym		WCSP (in review)
Echinocactus turbiniformis Pfeiff.	Unresolved		WCSP (in review)
Echinocactus umadeave (Fric) Werderm. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus uncinatus Galeotti ex Pfeiff.	Unresolved		WCSP (in review)
Echinocactus uncinatus Engelm. ex Scheer	Synonym		WCSP (in review)
Echinocactus uncinatus var. wrightii Engelm.	Synonym		WCSP (in review)
Echinocactus uncinatus f. wrightii (Engelm.) Schelle	Synonym		WCSP (in review)
Echinocactus undulatus A.Dietr.	Unresolved		WCSP (in review)
Echinocactus unguispinus Engelm.	Unresolved		WCSP (in review)
Echinocactus urselianus auct. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus uruguayensis Arechav.	Synonym		WCSP (in review)
Echinocactus uruguayensis f. depressus Osten	Synonym		WCSP (in review)
Echinocactus uruguensis K. Schum.	Unresolved		TRO
Echinocactus valdezianus (H.Möller) Boed.	Unresolved		WCSP (in review)
Echinocactus valparaiso C.F.Först.	Synonym		WCSP (in review)
Echinocactus van-gaertii C.F.Först.	Synonym		WCSP (in review)
Echinocactus vanderaeyi Lem.	Synonym		WCSP (in review)
Echinocactus vargasii Regel & E.Klein bis [Unplaced]	Unresolved		WCSP (in review)
Echinocactus vaupelianus Werderm.	Unresolved		WCSP (in review)
Echinocactus verutum Foerster	Unresolved		TRO
Echinocactus victoriensis Rose	Synonym		WCSP (in review)
Echinocactus viereckii Werderm.	Unresolved		WCSP (in review)
Echinocactus villifer Scheidw.	Unresolved		TRO
Echinocactus villosus (Monv.) Labour. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus villosus var. niger A.Berger	Synonym		WCSP (in review)
Echinocactus violaciflorus Quehl	Unresolved		WCSP (in review)
Echinocactus violaciflorus (Quehl) Britton & Rose	Synonym		TRO
Echinocactus viridescens Nutt.	Synonym		WCSP (in review)
Echinocactus viridescens var. cylindraceus Engelm.	Synonym		WCSP (in review)
Echinocactus viridiflorus (Engelm.) Pritz.	Synonym		WCSP (in review)
Echinocactus visnaga Hook.	Synonym		WCSP (in review)
Echinocactus viviparus Poselg.	Unresolved		WCSP (in review)
Echinocactus viznaga Hook.	Synonym		WCSP (in review)
Echinocactus vorwerkianus Werderm.	Unresolved		WCSP (in review)
Echinocactus wagnerianus A.Berger	Unresolved		WCSP (in review)
Echinocactus wangertii Labour.	Unresolved		TRO
Echinocactus weberbaueri Vaupel	Synonym		WCSP (in review)
Echinocactus wegeneri Salm-Dyck [Unplaced]	Unresolved		WCSP (in review)
Echinocactus weingartianus Haage Jr. in Quehl	Unresolved		TRO
Echinocactus whipplei Engelm. & J.M.Bigelow	Unresolved		WCSP (in review)
Echinocactus wilhelmii S.A. Mori	Unresolved		TRO
Echinocactus williamsii Lem.	Unresolved		WCSP (in review)
Echinocactus williamsii var. luteus Rouhier	Unresolved		WCSP (in review)
Echinocactus winkleri Poselg.	Unresolved		WCSP (in review)
Echinocactus wippermannii Muehlenpf. [Unplaced]	Unresolved		WCSP (in review)
Echinocactus wislizeni Engelm.	Synonym		WCSP (in review)
Echinocactus wislizeni var. albispinus Toumey	Synonym		WCSP (in review)
Echinocactus wislizeni f. albispinus (Toumey) Schelle	Synonym		WCSP (in review)
Echinocactus wislizeni var. lecontei (Engelm.) Engelm.	Synonym		WCSP (in review)
Echinocactus wislizeni f. lecontei (Engelm.) Schelle	Synonym		WCSP (in review)
Echinocactus wislizeni var. phoeniceus R.E.Kunze	Synonym		WCSP (in review)
Echinocactus wislizeni f. phoeniceus (R.E.Kunze) Schelle	Synonym		WCSP (in review)
Echinocactus wislizeni subsp. tiburonensis (G.E.Linds.) Felger	Synonym		WCSP (in review)
Echinocactus wrightii (Engelm.) Small	Unresolved		WCSP (in review)
Echinocactus wrightii J.M. Coult.	Synonym		TRO
Echinocactus xanthacanthus Miq.	Unresolved		WCSP (in review)
Echinocactus xeranthemoides (J.M. Coult.) Engelm.	Synonym		TRO
Echinocactus xeranthemoides (Coult.) Engelm. ex K.Schum.	Synonym		WCSP (in review)
Echinocactus xiphacanthus Miq.	Unresolved		WCSP (in review)
Echinocactus zacatecasensis A.Berger	Unresolved		WCSP (in review)
Echinocactus zehntneri (Britton & Rose) Luetzelb.	Synonym		WCSP (in review)