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⚠ Version 1 of The Plant List has been superseded.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 Cactus monstrosus; we will try Cactus instead.

692 plant name records match your search criteria Cactus. The results are below.

• Genus Cactus 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
Cactus abnormis Willd.	Synonym		WCSP (in review)
Cactus acanthophlegma Kuntze	Unresolved		WCSP (in review)
Cactus acanthophlegmus (Lehm.) Kuntze	Accepted		TRO
Cactus acanthostephes Kuntze	Unresolved		WCSP (in review)
Cactus acicularis Kuntze	Unresolved		WCSP (in review)
Cactus aciculatus Kuntze	Synonym		WCSP (in review)
Cactus ackermannii Haw.	Synonym		WCSP (in review)
Cactus actinopleus Kuntze	Unresolved		WCSP (in review)
Cactus aculeatissimus Zeph ex Steudel	Unresolved		TRO
Cactus aeruginosus Kuntze	Synonym		WCSP (in review)
Cactus affinis Kuntze	Unresolved		WCSP (in review)
Cactus alatus Sw.	Unresolved		WCSP (in review)
Cactus alatus Willd.	Misapplied		WCSP (in review)
Cactus alatus Hook.	Synonym		WCSP (in review)
Cactus albisetosus (Haw.) Spreng.	Synonym		WCSP (in review)
Cactus albisetus Steud.	Unresolved		TRO
Cactus alpinus Kuntze	Unresolved		WCSP (in review)
Cactus alteolens (Lem.) Kuntze	Synonym		WCSP (in review)
Cactus alternatus J.M.Coult. [Unplaced]	Unresolved		WCSP (in review)
Cactus amabilis Kuntze	Unresolved		WCSP (in review)
Cactus ambiguus Bonpl.	Synonym		WCSP (in review)
Cactus ambiguus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus americanus Vitman [Unplaced]	Unresolved		WCSP (in review)
Cactus amoenus Hoffmannsegg	Unresolved		TRO
Cactus ancistracanthus Kuntze	Unresolved		WCSP (in review)
Cactus ancistrius Kuntze	Unresolved		WCSP (in review)
Cactus ancistroides Kuntze	Unresolved		WCSP (in review)
Cactus anguineus Kuntze	Unresolved		WCSP (in review)
Cactus anizogonus C.F.Först.	Unresolved		WCSP (in review)
Cactus antonii Britton	Unresolved		WCSP (in review)
Cactus arboreus Vell.	Synonym		WCSP (in review)
Cactus areolosus Kuntze	Unresolved		WCSP (in review)
Cactus argenteus Kuntze	Unresolved		WCSP (in review)
Cactus atratus Kuntze	Unresolved		WCSP (in review)
Cactus atroruber Kuntze	Unresolved		WCSP (in review)
Cactus atrosanguineus Kuntze	Unresolved		WCSP (in review)
Cactus aulacanthus Kuntze	Unresolved		WCSP (in review)
Cactus aulacothele Kuntze	Unresolved		WCSP (in review)
Cactus aurantiaca Gillies ex Loudon	Unresolved		WCSP (in review)
Cactus aurantiacus Lem.	Unresolved		TRO
Cactus aurantiiformis Thiery ex Steudel	Unresolved		TRO
Cactus aureiceps Kuntze	Unresolved		WCSP (in review)
Cactus aureus Meyen	Synonym		WCSP (in review)
Cactus auricomus Kuntze	Unresolved		WCSP (in review)
Cactus auroreus Kuntze	Synonym		WCSP (in review)
Cactus ayrampe Azara [Unplaced]	Unresolved		WCSP (in review)
Cactus bahiensis Britton & Rose	Unresolved		WCSP (in review)
Cactus barbatus Kuntze	Unresolved		WCSP (in review)
Cactus barlowii Kuntze	Unresolved		WCSP (in review)
Cactus bellatulus Kuntze	Unresolved		WCSP (in review)
Cactus beneckei Kuntze	Unresolved		WCSP (in review)
Cactus berteroi Colla	Synonym		WCSP (in review)
Cactus bertini Markgr.	Unresolved		TRO
Cactus bicolor Terán & Berland.	Unresolved		WCSP (in review)
Cactus bicolor Berland. ex Engelm.	Synonym		WCSP (in review)
Cactus biglandulosus Kuntze	Unresolved		WCSP (in review)
Cactus bihamatus Kuntze	Unresolved		WCSP (in review)
Cactus bispinus J.M. Coult.	Unresolved		TRO
Cactus bleo Kunth	Synonym		WCSP (in review)
Cactus bleo Torr.	Unresolved		WCSP (in review)
Cactus bocasanus J.M.Coult.	Unresolved		WCSP (in review)
Cactus bockii Kuntze	Unresolved		WCSP (in review)
Cactus bolivianus Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus bonaerensis Larrañaga [Unplaced]	Unresolved		WCSP (in review)
Cactus bonplandii Kunth	Unresolved		WCSP (in review)
Cactus bradypus Lehm.	Synonym		WCSP (in review)
Cactus brandegeei J.M.Coult	Unresolved		WCSP (in review)
Cactus brasiliensis Willd.	Synonym		WCSP (in review)
Cactus brevimamma Kuntze	Unresolved		WCSP (in review)
Cactus brevisetus Kuntze	Unresolved		WCSP (in review)
Cactus broadwayi Britton & Rose	Unresolved		WCSP (in review)
Cactus brownii (Toumey) Toumey	Accepted		TRO
Cactus brunneus J.M.Coult. [Unplaced]	Unresolved		WCSP (in review)
Cactus bulbispinus Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus caesius (H.L.Wendl.) Britton & Rose	Synonym		WCSP (in review)
Cactus caespititius Kuntze	Unresolved		WCSP (in review)
Cactus calcaratus Kuntze	Unresolved		WCSP (in review)
Cactus californicus Torr. & A.Gray	Unresolved		WCSP (in review)
Cactus campechianus Thierry	Unresolved		TRO
Cactus candelaris Meyen	Synonym		TRO
Cactus canescens Moç. & Sessé ex DC.	Unresolved		WCSP (in review)
Cactus capillaris J.M.Coult.	Unresolved		WCSP (in review)
Cactus caripensis Kunth	Synonym		WCSP (in review)
Cactus carneus Kuntze	Unresolved		WCSP (in review)
Cactus caronatus Willd.	Synonym		WCSP (in review)
Cactus cassythoides Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus caudata Gillies ex Loudon	Synonym		WCSP (in review)
Cactus celsianus Kuntze	Unresolved		WCSP (in review)
Cactus centricirrhus Kuntze	Unresolved		WCSP (in review)
Cactus centrispinus Kuntze	Unresolved		WCSP (in review)
Cactus cephalophorus Kuntze	Unresolved		WCSP (in review)
Cactus ceratocentrus (Bergman) Kuntze	Accepted		TRO
Cactus ceratrocentrus Kuntze	Unresolved		WCSP (in review)
Cactus chilensis Colla [Unplaced]	Unresolved		WCSP (in review)
Cactus chiloensis (DC.) Colla ex Steud.	Synonym		WCSP (in review)
Cactus chinensis Roxb.	Unresolved		WCSP (in review)
Cactus chloranthus Terán & Berland. [Unplaced]	Unresolved		WCSP (in review)
Cactus chlorocarpus Kunth	Synonym		WCSP (in review)
Cactus chrysacanthus Kuntze	Unresolved		WCSP (in review)
Cactus cirrhifer Kuntze	Unresolved		WCSP (in review)
Cactus clavatus Lem.	Unresolved		WCSP (in review)
Cactus clavus Kuntze	Unresolved		WCSP (in review)
Cactus coccineus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus cochenillifer L.	Synonym		WCSP (in review)
Cactus cochenillifer Moç. & Sessé ex DC.	Unresolved		WCSP (in review)
Cactus columnaris Moç. & Sessé ex DC.	Unresolved		WCSP (in review)
Cactus communis (W.T.Aiton) Steud.	Unresolved		WCSP (in review)
Cactus compactus Kuntze	Unresolved		WCSP (in review)
Cactus compressus Salisb.	Unresolved		WCSP (in review)
Cactus compressus Kuntze	Unresolved		WCSP (in review)
Cactus compressus Salisb.	Synonym		TRO
Cactus conicus Kuntze	Unresolved		WCSP (in review)
Cactus conifer (Haw.) Kuntze	Accepted		TRO
Cactus conoideus Kuntze	Unresolved		WCSP (in review)
Cactus conopseus Kuntze	Unresolved		WCSP (in review)
Cactus coquimbanus Molina	Synonym		WCSP (in review)
Cactus coranarius Cav.	Synonym		WCSP (in review)
Cactus cornifer Kuntze	Unresolved		WCSP (in review)
Cactus corniferus Kuntze	Unresolved		TRO
Cactus cornigerus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus corollarius Kuntze	Unresolved		WCSP (in review)
Cactus coronatus Lam.	Unresolved		WCSP (in review)
Cactus coronatus Kuntze	Unresolved		WCSP (in review)
Cactus corrugatus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus crassispinus Kuntze	Unresolved		WCSP (in review)
Cactus crebrispinus Kuntze	Unresolved		WCSP (in review)
Cactus crinitus Kuntze	Unresolved		WCSP (in review)
Cactus crispatus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus crocidatus Kuntze	Unresolved		WCSP (in review)
Cactus cruciformis Vell.	Synonym		WCSP (in review)
Cactus cruciger Kuntze	Unresolved		WCSP (in review)
Cactus curassavicus L.	Synonym		WCSP (in review)
Cactus curvispinus Bertero ex Colla	Synonym		WCSP (in review)
Cactus curvispinus Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus cylindraceus Kuntze	Unresolved		WCSP (in review)
Cactus cylindricus Lam.	Unresolved		WCSP (in review)
Cactus cylindricus Ortega	Synonym		WCSP (in review)
Cactus cylindricus Vell.	Unresolved		WCSP (in review)
Cactus cylindricus J.James	Unresolved		WCSP (in review)
Cactus dasyacanthus Kuntze	Unresolved		WCSP (in review)
Cactus dealbatus Kuntze	Unresolved		WCSP (in review)
Cactus decipiens Kuntze	Unresolved		WCSP (in review)
Cactus decumanus Willd.	Unresolved		WCSP (in review)
Cactus densispinus J.M.Coult	Unresolved		WCSP (in review)
Cactus densus Kuntze	Synonym		WCSP (in review)
Cactus dentatus (K. Schum.) Ruiz ex Mart.	Accepted		TRO
Cactus depressus Haw.	Synonym		WCSP (in review)
Cactus depressus DC.	Unresolved		WCSP (in review)
Cactus depressus Kuntze	Unresolved		WCSP (in review)
Cactus depressus (Hook.) Borg [Illegitimate]	Unresolved		WCSP (in review)
Cactus diadema Kuntze	Unresolved		WCSP (in review)
Cactus dillenii Ker Gawl.	Unresolved		WCSP (in review)
Cactus disciformis Kuntze	Synonym		WCSP (in review)
Cactus discolor Kuntze	Unresolved		WCSP (in review)
Cactus divaricatus Lam.	Unresolved		WCSP (in review)
Cactus divaricatus Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus divergens Kuntze	Unresolved		WCSP (in review)
Cactus dolichocentrus Kuntze	Unresolved		WCSP (in review)
Cactus dyckianus Kuntze	Unresolved		WCSP (in review)
Cactus eborinus Kuntze	Unresolved		WCSP (in review)
Cactus eburneus Link	Synonym		WCSP (in review)
Cactus eburneus (Salm-Dyck) Spreng.	Synonym		WCSP (in review)
Cactus echinaria (DC.) Kuntze	Synonym		TRO
Cactus echinata Kuntze	Synonym		WCSP (in review)
Cactus echinocactoides Kuntze	Unresolved		WCSP (in review)
Cactus echinocarpus Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus echinus Kuntze	Unresolved		WCSP (in review)
Cactus ehrenbergii Kuntze	Unresolved		WCSP (in review)
Cactus elatior (Mill.) Willd.	Synonym		WCSP (in review)
Cactus elegans Link	Unresolved		WCSP (in review)
Cactus elegans Kuntze	Unresolved		WCSP (in review)
Cactus elephantidens Kuntze	Unresolved		WCSP (in review)
Cactus elongatus Willd.	Synonym		WCSP (in review)
Cactus elongatus Kuntze	Unresolved		WCSP (in review)
Cactus emoryi Lem.	Unresolved		WCSP (in review)
Cactus engelmannii Kuntze	Unresolved		WCSP (in review)
Cactus ensiformis Biden [Unplaced]	Unresolved		WCSP (in review)
Cactus epidendrum L.	Synonym		WCSP (in review)
Cactus erectacanthus Kuntze	Unresolved		WCSP (in review)
Cactus erectus Kuntze	Unresolved		WCSP (in review)
Cactus eriacanthus Kuntze	Unresolved		WCSP (in review)
Cactus erinaceus Haw.	Unresolved		WCSP (in review)
Cactus eschanzieri J.M.Coult.	Synonym		WCSP (in review)
Cactus eschauzieri J.M. Coult.	Synonym		TRO
Cactus euchlorus (Ehrenb.) Kuntze	Accepted		TRO
Cactus euclorus Kuntze	Unresolved		WCSP (in review)
Cactus euphorbioides (Haw.) Spreng.	Unresolved		WCSP (in review)
Cactus eximius Kuntze	Unresolved		WCSP (in review)
Cactus exsudans (Zucc.) Kuntze	Synonym		TRO
Cactus exudans Kuntze	Unresolved		WCSP (in review)
Cactus fascicularis Meyen	Synonym		WCSP (in review)
Cactus fasciculatus Willd.	Synonym		WCSP (in review)
Cactus fasciculatus Kuntze	Unresolved		WCSP (in review)
Cactus fellneri Kuntze	Unresolved		WCSP (in review)
Cactus ferox Willd.	Synonym		WCSP (in review)
Cactus ferox Nutt.	Unresolved		WCSP (in review)
Cactus ficus Thunb.	Unresolved		WCSP (in review)
Cactus ficus-indica L.	Synonym		WCSP (in review)
Cactus fimbriatus Lam.	Synonym		WCSP (in review)
Cactus fimbriatus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus fimbriatus Descourt.	Synonym		WCSP (in review)
Cactus fischeri Kuntze	Unresolved		WCSP (in review)
Cactus flagelliformis L.	Synonym		WCSP (in review)
Cactus flavescens DC.	Unresolved		WCSP (in review)
Cactus flavispinus Colla	Synonym		WCSP (in review)
Cactus floribundus Kuntze	Unresolved		WCSP (in review)
Cactus foersteri Kuntze	Unresolved		WCSP (in review)
Cactus foliosus Willd.	Unresolved		WCSP (in review)
Cactus foliosus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus formosus Kuntze	Unresolved		WCSP (in review)
Cactus foveolatus Kuntze	Unresolved		WCSP (in review)
Cactus fragilis Nutt.	Synonym		WCSP (in review)
Cactus frutescens Moç. & Sessé ex Pfeiff.	Synonym		WCSP (in review)
Cactus fulvispinosus Spreng.	Unresolved		WCSP (in review)
Cactus fulvispinus Kuntze	Unresolved		WCSP (in review)
Cactus funalis Spreng.	Synonym		WCSP (in review)
Cactus funckii Kuntze	Unresolved		WCSP (in review)
Cactus fuscatus Kuntze	Unresolved		WCSP (in review)
Cactus gabbii J.M.Coult.	Unresolved		WCSP (in review)
Cactus garipensis Kunth	Unresolved		TRO
Cactus geminatus Kuntze	Unresolved		WCSP (in review)
Cactus geminispinus Kuntze	Synonym		WCSP (in review)
Cactus gibbosus Haw.	Synonym		WCSP (in review)
Cactus gibbosus Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus glabratus Kuntze	Unresolved		WCSP (in review)
Cactus gladiatus Kuntze	Unresolved		WCSP (in review)
Cactus glanduliger Kuntze	Unresolved		WCSP (in review)
Cactus glaucus Kuntze	Unresolved		WCSP (in review)
Cactus glochidiatus Kuntze	Synonym		WCSP (in review)
Cactus glomeratus Lam.	Synonym		WCSP (in review)
Cactus goodrichii (Engelm.) Kuntze	Accepted		TRO
Cactus goodridgii Kuntze	Unresolved		WCSP (in review)
Cactus gracilis Kuntze	Unresolved		WCSP (in review)
Cactus gracilis (Mill.) Weston	Synonym		TRO
Cactus grahamii Kuntze	Unresolved		WCSP (in review)
Cactus grahlianus Kuntze	Synonym		WCSP (in review)
Cactus grandicornis Kuntze	Unresolved		WCSP (in review)
Cactus grandiflorus L.	Synonym		WCSP (in review)
Cactus grandiflorus Kuntze	Unresolved		WCSP (in review)
Cactus grandifolius Link [Illegitimate]	Synonym		WCSP (in review)
Cactus granulatus Kuntze	Unresolved		WCSP (in review)
Cactus griseus Kuntze	Unresolved		WCSP (in review)
Cactus guillemianus Kuntze	Unresolved		WCSP (in review)
Cactus guilleminianus (Lem.) Kuntze	Accepted		TRO
Cactus gummifer Kuntze	Unresolved		WCSP (in review)
Cactus gummiferus (Engelm.) Kuntze	Synonym		TRO
Cactus haageanus Kuntze	Unresolved		WCSP (in review)
Cactus haematactinus Kuntze	Unresolved		WCSP (in review)
Cactus halei J.M.Coult.	Unresolved		WCSP (in review)
Cactus hamatus Kuntze	Unresolved		WCSP (in review)
Cactus harlowii Britton & Rose	Unresolved		WCSP (in review)
Cactus haworthianus Kuntze	Unresolved		WCSP (in review)
Cactus haworthii (DC.) Spreng.	Synonym		WCSP (in review)
Cactus heinei Kuntze	Unresolved		WCSP (in review)
Cactus helicteres Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus hemisphaericus Small	Unresolved		WCSP (in review)
Cactus heptagonus L. [Unplaced]	Unresolved		WCSP (in review)
Cactus heptagonus Vell. [Illegitimate]	Synonym		WCSP (in review)
Cactus hernandezii (DC.) Oken	Unresolved		WCSP (in review)
Cactus heterocladus A.St.-Hil.	Synonym		WCSP (in review)
Cactus heterogonus DC. [Unplaced]	Unresolved		WCSP (in review)
Cactus heteromorphus Kuntze	Unresolved		WCSP (in review)
Cactus hexacanthus (Salm-Dyck) Kuntze	Accepted		TRO
Cactus hexagonus L.	Synonym		WCSP (in review)
Cactus hexagonus Lam. [Illegitimate]	Synonym		WCSP (in review)
Cactus hexagonus Vell. [Unplaced]	Unresolved		WCSP (in review)
Cactus hexasanthus Kuntze	Unresolved		WCSP (in review)
Cactus heyderi Kuntze	Unresolved		WCSP (in review)
Cactus horridus Salisb.	Unresolved		WCSP (in review)
Cactus horridus Kunth	Unresolved		WCSP (in review)
Cactus horridus Colla	Synonym		WCSP (in review)
Cactus humboldtii Kunth	Synonym		WCSP (in review)
Cactus humboldtii Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus humifusus Raf.	Unresolved		WCSP (in review)
Cactus humilis Haw.	Unresolved		WCSP (in review)
Cactus humilis Lag.	Synonym		WCSP (in review)
Cactus hybridus Van Geel [Unplaced]	Unresolved		WCSP (in review)
Cactus hyptiacanthus Lem. ex Steud.	Unresolved		WCSP (in review)
Cactus hystrix Salm-Dyck	Synonym		WCSP (in review)
Cactus hystrix Kuntze	Unresolved		WCSP (in review)
Cactus hystrix Haw.	Synonym		TRO
Cactus icosagonus Kunth	Synonym		WCSP (in review)
Cactus imbricatus Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus incurvus Kuntze	Unresolved		WCSP (in review)
Cactus indicus Roxb.	Unresolved		WCSP (in review)
Cactus intertextus Kuntze	Unresolved		WCSP (in review)
Cactus intortus Mill.	Unresolved		WCSP (in review)
Cactus irregularis Kuntze	Unresolved		WCSP (in review)
Cactus isabellinus Kuntze	Unresolved		WCSP (in review)
Cactus italicus Ten.	Unresolved		TRO
Cactus italicus Tenore ex Steudel	Unresolved		TRO
Cactus jamacaru (DC.) Kostel.	Synonym		WCSP (in review)
Cactus jansenianus (Backeb.) Borg	Unresolved		WCSP (in review)
Cactus jenkinsonii McIntosh [Unplaced]	Unresolved		WCSP (in review)
Cactus jucundus Kuntze	Unresolved		WCSP (in review)
Cactus kagenickii C.C.Gmel.	Unresolved		WCSP (in review)
Cactus karwinskianus Kuntze	Unresolved		WCSP (in review)
Cactus kleinii Kuntze	Unresolved		WCSP (in review)
Cactus klugii Kuntze	Unresolved		WCSP (in review)
Cactus kotschubeyi Kuntze	Unresolved		WCSP (in review)
Cactus krameri Kuntze	Unresolved		WCSP (in review)
Cactus kunthii Kuntze	Unresolved		WCSP (in review)
Cactus lactescens Kuntze	Unresolved		WCSP (in review)
Cactus laetus Kunth	Unresolved		WCSP (in review)
Cactus lamarkii Colla	Unresolved		WCSP (in review)
Cactus lanatus Kunth	Synonym		WCSP (in review)
Cactus lanceolatus Haw.	Synonym		WCSP (in review)
Cactus langsdorfii Lehm.	Unresolved		WCSP (in review)
Cactus lanifer Kuntze	Unresolved		WCSP (in review)
Cactus laniferus (J.M. Coult.) Kuntze	Accepted		TRO
Cactus lanuginosus L.	Synonym		WCSP (in review)
Cactus lasiacanthus Kuntze	Unresolved		WCSP (in review)
Cactus latimamma Kuntze	Unresolved		WCSP (in review)
Cactus latispinus Haw.	Synonym		WCSP (in review)
Cactus lecchii Colla	Synonym		WCSP (in review)
Cactus lehmannii Kuntze	Unresolved		WCSP (in review)
Cactus lemairei Britton & Rose	Synonym		WCSP (in review)
Cactus leucocentrus Kuntze	Unresolved		WCSP (in review)
Cactus leucodasys Kuntze	Synonym		WCSP (in review)
Cactus leucodictyus Kuntze	Unresolved		WCSP (in review)
Cactus leucotrichus Kuntze	Unresolved		WCSP (in review)
Cactus linkeanus Kuntze	Unresolved		WCSP (in review)
Cactus linkii Lehm.	Unresolved		WCSP (in review)
Cactus lividus Kuntze	Unresolved		WCSP (in review)
Cactus longimamma Kuntze	Unresolved		WCSP (in review)
Cactus longisetus Kuntze	Unresolved		WCSP (in review)
Cactus loricatus Kuntze	Unresolved		WCSP (in review)
Cactus lucidus Salisb.	Synonym		WCSP (in review)
Cactus ludwigii Kuntze	Unresolved		WCSP (in review)
Cactus lyratus Vell.	Unresolved		WCSP (in review)
Cactus macracanthus Salm-Dyck	Unresolved		WCSP (in review)
Cactus macracanthus Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus macromeris Kuntze	Unresolved		WCSP (in review)
Cactus macrothele Kuntze	Unresolved		WCSP (in review)
Cactus maculatus J.M.Coult. [Unplaced]	Unresolved		WCSP (in review)
Cactus magnimamma Salm-Dyck ex Steud.	Unresolved		WCSP (in review)
Cactus mallisonii Loudon	Unresolved		WCSP (in review)
Cactus mammillaris L.	Synonym		WCSP (in review)
Cactus mammillaris Nutt. [Illegitimate]	Unresolved		WCSP (in review)
Cactus mammillaris var. glaber DC.	Synonym		WCSP (in review)
Cactus mammillaris var. lanuginosus DC.	Synonym		WCSP (in review)
Cactus mammillaris var. prolifer Aiton	Synonym		WCSP (in review)
Cactus martianus Kuntze	Unresolved		WCSP (in review)
Cactus maschalacanthus Kuntze	Unresolved		WCSP (in review)
Cactus matanzanus (León) Borg	Unresolved		WCSP (in review)
Cactus maximus Colla	Unresolved		TRO
Cactus maxonii Rose	Unresolved		WCSP (in review)
Cactus megacanthus Kuntze	Unresolved		WCSP (in review)
Cactus meiacanthus Kuntze	Unresolved		WCSP (in review)
Cactus meissneri Kuntze	Unresolved		WCSP (in review)
Cactus melaleucus Kuntze	Unresolved		WCSP (in review)
Cactus melocactoides Hoffmanns.	Unresolved		WCSP (in review)
Cactus melocactus L.	Unresolved		WCSP (in review)
Cactus melocactus (K. Schum.) Vell.	Synonym		TRO
Cactus melocactus var. communis W.T.Aiton	Unresolved		WCSP (in review)
Cactus melocactus var. communis Aiton	Synonym		TRO
Cactus mensarum Thiery ex Steudel	Unresolved		TRO
Cactus meonacanthus Lem. ex Steud.	Synonym		WCSP (in review)
Cactus micans Kuntze	Unresolved		WCSP (in review)
Cactus micracanthus Kuntze	Unresolved		WCSP (in review)
Cactus micranthus Kunth	Unresolved		WCSP (in review)
Cactus microcephalus (Miq.) Borg	Unresolved		WCSP (in review)
Cactus microceras Kuntze	Unresolved		WCSP (in review)
Cactus microdasys Lehm.	Unresolved		WCSP (in review)
Cactus micromeris Kuntze	Unresolved		WCSP (in review)
Cactus microthele Spreng.	Unresolved		WCSP (in review)
Cactus minimus Kuntze	Unresolved		WCSP (in review)
Cactus miquelii (Lehm.) Borg	Unresolved		WCSP (in review)
Cactus mirabilis Kuntze	Unresolved		WCSP (in review)
Cactus missourensis Kuntze	Unresolved		WCSP (in review)
Cactus mitis Kuntze	Unresolved		WCSP (in review)
Cactus monacanthos Willd.	Synonym		WCSP (in review)
Cactus moniliformis L.	Unresolved		WCSP (in review)
Cactus moniliformis Lam. [Illegitimate]	Synonym		WCSP (in review)
Cactus mucronatus Kuntze	Unresolved		WCSP (in review)
Cactus muehlenpfordtii Kuntze	Unresolved		WCSP (in review)
Cactus multangularis Willd.	Unresolved		WCSP (in review)
Cactus multangularis Voigt ex Steud.	Synonym		WCSP (in review)
Cactus multangularis Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus multiceps Kuntze	Unresolved		WCSP (in review)
Cactus multisectus Kuntze	Unresolved		WCSP (in review)
Cactus mutabilis Kuntze	Unresolved		WCSP (in review)
Cactus mystax Kuntze	Unresolved		WCSP (in review)
Cactus nanus Kunth	Synonym		WCSP (in review)
Cactus napoleonis Loudon	Synonym		WCSP (in review)
Cactus neglectus Dehnh. [Unplaced]	Unresolved		WCSP (in review)
Cactus neomexicanus Small	Unresolved		WCSP (in review)
Cactus neryi (K.Schum.) Britton & Rose	Synonym		WCSP (in review)
Cactus neumannianus Kuntze	Unresolved		WCSP (in review)
Cactus niger Spreng.	Synonym		WCSP (in review)
Cactus niger Kuntze	Unresolved		WCSP (in review)
Cactus nigricans Haw.	Unresolved		WCSP (in review)
Cactus nigricans Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus niveus Kuntze	Synonym		WCSP (in review)
Cactus nivosus Kuntze	Unresolved		WCSP (in review)
Cactus nobilis L.	Synonym		WCSP (in review)
Cactus nobilis Lam.	Synonym		WCSP (in review)
Cactus nobilis Haw.	Synonym		WCSP (in review)
Cactus nobilis Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus nopal Thierry	Unresolved		TRO
Cactus notesteinii Rydb.	Unresolved		WCSP (in review)
Cactus nudus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus nudus Kuntze	Synonym		WCSP (in review)
Cactus oaxacensis Britton & Rose	Unresolved		WCSP (in review)
Cactus obconella Kuntze	Unresolved		WCSP (in review)
Cactus obliquus Kuntze	Unresolved		WCSP (in review)
Cactus obtusipetalus Britton & Rose	Unresolved		WCSP (in review)
Cactus obvallatus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus obvallatus Kuntze	Unresolved		WCSP (in review)
Cactus octacanthus Kuntze	Unresolved		WCSP (in review)
Cactus octogonus Page ex Steud.	Synonym		WCSP (in review)
Cactus odieranus Kuntze	Unresolved		WCSP (in review)
Cactus olorinus Kuntze	Unresolved		WCSP (in review)
Cactus oothele Kuntze	Unresolved		WCSP (in review)
Cactus opuntia L.	Unresolved		WCSP (in review)
Cactus opuntia Guss.	Unresolved		WCSP (in review)
Cactus opuntia L.	Synonym		TRO
Cactus opuntia var. inermis DC.	Synonym		TRO
Cactus opuntiaeflorus Moc. & Sessé ex Pfeiff.	Unresolved		TRO
Cactus opuntiiflorus Moç. & Sessé ex Pfeiff.	Unresolved		WCSP (in review)
Cactus oreas Britton & Rose	Unresolved		WCSP (in review)
Cactus ottonis Lehm.	Unresolved		WCSP (in review)
Cactus ottonis Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus ovatus Gillies ex Loudon	Unresolved		WCSP (in review)
Cactus ovimamma Kuntze	Unresolved		WCSP (in review)
Cactus ovoides Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus oxypetalus Moç. & Sessé ex DC.	Unresolved		WCSP (in review)
Cactus pallescens Kuntze	Unresolved		WCSP (in review)
Cactus palmeri J.M.Coult.	Unresolved		WCSP (in review)
Cactus paniculatus Lam.	Unresolved		WCSP (in review)
Cactus paradoxus Hornem.	Unresolved		WCSP (in review)
Cactus parasiticus L.	Synonym		WCSP (in review)
Cactus parasiticus Lam.	Unresolved		WCSP (in review)
Cactus parkinsonii Kuntze	Unresolved		WCSP (in review)
Cactus parryi Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus parvifolius Ehrh. ex F.Dietr. [Unplaced]	Unresolved		WCSP (in review)
Cactus parvimamma Kuntze	Unresolved		WCSP (in review)
Cactus parvimammus Kuntze	Unresolved		TRO
Cactus parvispinus Haw.	Synonym		WCSP (in review)
Cactus pazzanii Kuntze	Unresolved		WCSP (in review)
Cactus pectinatus Kuntze	Unresolved		WCSP (in review)
Cactus pendulinus Sieber ex DC.	Unresolved		WCSP (in review)
Cactus pendulus Sw.	Synonym		WCSP (in review)
Cactus pentacanthus Kuntze	Unresolved		WCSP (in review)
Cactus pentagonus L.	Synonym		WCSP (in review)
Cactus pentagonus Vell. [Unplaced]	Unresolved		WCSP (in review)
Cactus pentlandii Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus pereskia L.	Synonym		WCSP (in review)
Cactus persicanus Kuntze	Unresolved		WCSP (in review)
Cactus peruvianus L.	Synonym		WCSP (in review)
Cactus peruvianus DC. [Illegitimate]	Unresolved		WCSP (in review)
Cactus pfeifferianus Kuntze	Unresolved		WCSP (in review)
Cactus phaeacanthus Kuntze	Unresolved		WCSP (in review)
Cactus phaeotrichus Kuntze	Unresolved		WCSP (in review)
Cactus phellospermus Kuntze	Unresolved		WCSP (in review)
Cactus phyllanthoides DC.	Unresolved		WCSP (in review)
Cactus phyllanthus L.	Synonym		WCSP (in review)
Cactus phymatothele Kuntze	Unresolved		WCSP (in review)
Cactus pictus Kuntze	Unresolved		WCSP (in review)
Cactus pitajaya Jacq. [Illegitimate]	Synonym		WCSP (in review)
Cactus placentiformis Lehm.	Synonym		WCSP (in review)
Cactus plaschnickii Kuntze	Unresolved		WCSP (in review)
Cactus plecostigma Kuntze	Unresolved		WCSP (in review)
Cactus pleiocephalus Kuntze	Unresolved		WCSP (in review)
Cactus polyanthos Sims	Synonym		WCSP (in review)
Cactus polycentrus Kuntze	Unresolved		WCSP (in review)
Cactus polycephalus Kuntze	Unresolved		WCSP (in review)
Cactus polyedrus Kuntze	Unresolved		WCSP (in review)
Cactus polygonus Lam.	Unresolved		WCSP (in review)
Cactus polygonus Kuntze	Unresolved		WCSP (in review)
Cactus polymorphus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus polymorphus Kuntze	Unresolved		WCSP (in review)
Cactus polythele Kuntze	Unresolved		WCSP (in review)
Cactus polytrichus Kuntze	Unresolved		WCSP (in review)
Cactus pomaceus Kuntze	Unresolved		WCSP (in review)
Cactus pondii J.M.Coult.	Unresolved		WCSP (in review)
Cactus portulacifolius L.	Unresolved		WCSP (in review)
Cactus pottsii Kuntze	Unresolved		WCSP (in review)
Cactus praelii Kuntze	Unresolved		WCSP (in review)
Cactus pretiosus Kuntze	Unresolved		WCSP (in review)
Cactus pringlei J.M.Coult.	Unresolved		WCSP (in review)
Cactus prismaticus Desf.	Synonym		WCSP (in review)
Cactus prismaticus Willd.	Synonym		WCSP (in review)
Cactus prismaticus Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus procerus Kuntze	Unresolved		WCSP (in review)
Cactus prolifer Willd. ex Pfeiff.	Unresolved		WCSP (in review)
Cactus proliferus Mill.	Unresolved		WCSP (in review)
Cactus proliferus var. mammillaris (Mill.) Aiton	Synonym		TRO
Cactus proteiformis Desf.	Synonym		WCSP (in review)
Cactus pruinosus Monv. ex Steud.	Synonym		WCSP (in review)
Cactus pseudococcinillifer Bertol. ex DC.	Unresolved		WCSP (in review)
Cactus pseudomammillaris Desf.	Unresolved		WCSP (in review)
Cactus pseudotuna Steud.	Unresolved		TRO
Cactus pubescens Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus pugionacanthus Kuntze	Unresolved		WCSP (in review)
Cactus pulchellus Kuntze	Unresolved		WCSP (in review)
Cactus pulcher Kuntze	Unresolved		WCSP (in review)
Cactus pulcherrimus Kuntze	Unresolved		WCSP (in review)
Cactus pulvilliger Kuntze	Unresolved		WCSP (in review)
Cactus purpureus Kuntze	Unresolved		WCSP (in review)
Cactus pusillus Haw.	Synonym		WCSP (in review)
Cactus pusillus DC.	Unresolved		WCSP (in review)
Cactus pusillus Kuntze	Unresolved		WCSP (in review)
Cactus pycnacanthus Kuntze	Unresolved		WCSP (in review)
Cactus pyramidalis Salm-Dyck	Synonym		WCSP (in review)
Cactus pyrrhocephalus Kuntze	Unresolved		WCSP (in review)
Cactus pyrrhochroacanthus (Lem.) Kuntze	Accepted		TRO
Cactus pyrrochroacanthus Kuntze	Unresolved		WCSP (in review)
Cactus quadrangularis Haw.	Synonym		WCSP (in review)
Cactus quadrangularis Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Cactus quadratus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus quadrispinus Kuntze	Unresolved		WCSP (in review)
Cactus radians Kuntze	Unresolved		WCSP (in review)
Cactus radians var. pectinoides Coult.	Synonym		WCSP (in review)
Cactus radiosus J.M.Coult.	Unresolved		WCSP (in review)
Cactus recurvatus Kuntze	Unresolved		WCSP (in review)
Cactus recurvispinus Kuntze	Unresolved		WCSP (in review)
Cactus recurvus Mill.	Synonym		WCSP (in review)
Cactus recurvus Kuntze	Unresolved		WCSP (in review)
Cactus reductus Link	Synonym		WCSP (in review)
Cactus regalis Spreng.	Synonym		WCSP (in review)
Cactus regius Kuntze	Unresolved		WCSP (in review)
Cactus repandus L.	Synonym		WCSP (in review)
Cactus reptans Willd.	Synonym		WCSP (in review)
Cactus reptans Salm-Dyck ex DC.	Synonym		WCSP (in review)
Cactus reticulatus Descourt. [Unplaced]	Unresolved		WCSP (in review)
Cactus retusus Kuntze	Unresolved		WCSP (in review)
Cactus rhaphidacanthus Kuntze	Unresolved		WCSP (in review)
Cactus rhodanthus Kuntze	Unresolved		WCSP (in review)
Cactus rhodanthus var. sulphureospinus J.M.Coult.	Unresolved		WCSP (in review)
Cactus rhodeocentrus Kuntze	Unresolved		WCSP (in review)
Cactus robustior Small [Unplaced]	Unresolved		WCSP (in review)
Cactus robustispinus Kuntze	Unresolved		WCSP (in review)
Cactus rosa Vell.	Synonym		WCSP (in review)
Cactus rosea Kuntze	Unresolved		WCSP (in review)
Cactus roseanus J.M.Coult.	Unresolved		WCSP (in review)
Cactus roseus (Scheidw.) Kuntze	Accepted		TRO
Cactus rotundifolius Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus royenii L.	Unresolved		WCSP (in review)
Cactus rubescens (Salm-Dyck ex DC.) Lem.	Unresolved		TRO
Cactus rueschianus Kuntze	Unresolved		WCSP (in review)
Cactus ruestii Britton & Rose	Unresolved		WCSP (in review)
Cactus ruficeps Kuntze	Unresolved		WCSP (in review)
Cactus rufidulus Kuntze	Synonym		WCSP (in review)
Cactus rufocroceus Kuntze	Unresolved		WCSP (in review)
Cactus rutilus Kuntze	Unresolved		WCSP (in review)
Cactus salicornioides (Haw.) Link & Otto	Synonym		TRO
Cactus salicornoides Steud.	Unresolved		WCSP (in review)
Cactus salmdyckianus Kuntze	Unresolved		WCSP (in review)
Cactus salmianus Lem. [Unplaced]	Unresolved		WCSP (in review)
Cactus salvador Britton & Rose	Unresolved		WCSP (in review)
Cactus saxatilis Kuntze	Unresolved		WCSP (in review)
Cactus scepontocentrus Kuntze	Unresolved		WCSP (in review)
Cactus schaeferi Kuntze	Unresolved		WCSP (in review)
Cactus scheeri Kuntze	Unresolved		WCSP (in review)
Cactus scheidweilerianus Kuntze	Unresolved		WCSP (in review)
Cactus schelhasii Kuntze	Unresolved		WCSP (in review)
Cactus schiedeanus Kuntze	Unresolved		WCSP (in review)
Cactus schilinzkyanus (F.Haage ex K.Schum.) Kuntze	Unresolved		WCSP (in review)
Cactus schlechtendalii Kuntze	Unresolved		WCSP (in review)
Cactus scolymodes Kuntze	Unresolved		WCSP (in review)
Cactus scopa Link	Synonym		WCSP (in review)
Cactus scopa Spreng. [Unplaced]	Unresolved		WCSP (in review)
Cactus seemannii Kuntze	Unresolved		WCSP (in review)
Cactus seidelii Kuntze	Unresolved		WCSP (in review)
Cactus seitzianus Kuntze	Unresolved		WCSP (in review)
Cactus sempervivi Kuntze	Unresolved		WCSP (in review)
Cactus senilis Haw.	Synonym		WCSP (in review)
Cactus senilis Kuntze [Illegitimate]	Unresolved		WCSP (in review)
Cactus sepium Kunth	Synonym		WCSP (in review)
Cactus sepium Larrañaga [Unplaced]	Unresolved		WCSP (in review)
Cactus sericeus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus serpens Kunth	Synonym		WCSP (in review)
Cactus serpentinus Lag. & Rodr.	Synonym		WCSP (in review)
Cactus serpentinus Pers.	Synonym		WCSP (in review)
Cactus setispinus J.M.Coult.	Unresolved		WCSP (in review)
Cactus setosus Kuntze	Unresolved		WCSP (in review)
Cactus severinii Kuntze	Unresolved		WCSP (in review)
Cactus similis (Engelm. & A.Gray) Small	Unresolved		WCSP (in review)
Cactus smithii Alexander	Unresolved		WCSP (in review)
Cactus solitarius Gillies ex Loudon	Synonym		WCSP (in review)
Cactus sororius Kuntze	Unresolved		WCSP (in review)
Cactus speciosissimus Desf.	Unresolved		WCSP (in review)
Cactus speciosus Cav.	Unresolved		WCSP (in review)
Cactus speciosus Desf. [Illegitimate]	Unresolved		WCSP (in review)
Cactus speciosus Hook. [Illegitimate]	Unresolved		WCSP (in review)
Cactus speciosus Bonpl.	Synonym		TRO
Cactus spectabilis Kuntze	Unresolved		WCSP (in review)
Cactus sphacelatus Kuntze	Unresolved		WCSP (in review)
Cactus sphaericus Kuntze	Unresolved		WCSP (in review)
Cactus sphaerotrichus Kuntze	Unresolved		WCSP (in review)
Cactus spinaureus Kuntze	Unresolved		WCSP (in review)
Cactus spini Colla	Unresolved		WCSP (in review)
Cactus spinosissimus Martyn	Synonym		WCSP (in review)
Cactus spinosissimus Kuntze	Unresolved		WCSP (in review)
Cactus spinosus Gillies ex Loudon	Synonym		WCSP (in review)
Cactus spiriformis Colla [Unplaced]	Unresolved		WCSP (in review)
Cactus splendidus Thierry	Unresolved		TRO
Cactus squarrosus Kuntze	Unresolved		WCSP (in review)
Cactus stella-aurata Kuntze	Unresolved		WCSP (in review)
Cactus stella-auratus Kuntze	Unresolved		TRO
Cactus stellaris Salm-Dyck	Unresolved		WCSP (in review)
Cactus stellatus Willd.	Unresolved		WCSP (in review)
Cactus stenocephalus Kuntze	Unresolved		WCSP (in review)
Cactus stramineus Spreng.	Unresolved		WCSP (in review)
Cactus strictus Haw.	Synonym		WCSP (in review)
Cactus strictus Willd.	Unresolved		WCSP (in review)
Cactus strobiliformis Kuntze	Unresolved		WCSP (in review)
Cactus stueberi Kuntze	Unresolved		WCSP (in review)
Cactus subangularis Kuntze	Unresolved		WCSP (in review)
Cactus subcroceus Kuntze	Unresolved		WCSP (in review)
Cactus subcurvatus Kuntze	Unresolved		WCSP (in review)
Cactus subechinatus Kuntze	Unresolved		WCSP (in review)
Cactus subinermis Link ex Steud.	Synonym		WCSP (in review)
Cactus subpolyedrus Kuntze	Unresolved		WCSP (in review)
Cactus subquadriflorus Moç. & Sessé ex DC.	Synonym		WCSP (in review)
Cactus subrepandus (Haw.) Spreng.	Synonym		WCSP (in review)
Cactus subtetragonus Kuntze	Unresolved		WCSP (in review)
Cactus subulifer Kuntze	Unresolved		WCSP (in review)
Cactus sulcatus (Engelm.) Small	Unresolved		WCSP (in review)
Cactus sulcolanatus Kuntze	Unresolved		WCSP (in review)
Cactus sulphureus Gillies ex Loudon	Unresolved		WCSP (in review)
Cactus supertextus Kuntze	Unresolved		WCSP (in review)
Cactus sylvestris Thiery ex Steudel	Unresolved		TRO
Cactus tamaulipensis Terán & Berland. [Unplaced]	Unresolved		WCSP (in review)
Cactus tectus Kuntze	Unresolved		WCSP (in review)
Cactus tentaculatus Kuntze	Unresolved		WCSP (in review)
Cactus tenuis Kuntze	Unresolved		WCSP (in review)
Cactus teres Vell.	Synonym		WCSP (in review)
Cactus teres Larrañaga [Unplaced]	Unresolved		WCSP (in review)
Cactus testudinis-crus (F.A.C. Weber) Thierry de Menonville	Accepted		TRO
Cactus tetracanthus Kuntze	Unresolved		WCSP (in review)
Cactus tetracentrus Kuntze	Unresolved		WCSP (in review)
Cactus tetragonus L.	Synonym		WCSP (in review)
Cactus tetrancistrus J.M.Coult.	Unresolved		WCSP (in review)
Cactus texanus Small [Unplaced]	Unresolved		WCSP (in review)
Cactus texensis Kuntze	Unresolved		WCSP (in review)
Cactus tomentosus Link	Unresolved		WCSP (in review)
Cactus tomentosus Kuntze	Unresolved		WCSP (in review)
Cactus torquatus Walp.	Unresolved		WCSP (in review)
Cactus townsendii Britton & Rose	Unresolved		WCSP (in review)
Cactus triacanthos Willd.	Unresolved		WCSP (in review)
Cactus triacanthus Kuntze	Unresolved		WCSP (in review)
Cactus triangularis L.	Synonym		WCSP (in review)
Cactus triangularis Vell.	Unresolved		WCSP (in review)
Cactus trichotomus Tenore ex Steudel	Unresolved		TRO
Cactus triflorus Larrañaga [Unplaced]	Unresolved		WCSP (in review)
Cactus triqueter Haw.	Synonym		WCSP (in review)
Cactus triqueter Willd.	Synonym		WCSP (in review)
Cactus triqueter Vell.	Synonym		WCSP (in review)
Cactus truncatus Link	Synonym		WCSP (in review)
Cactus tuberculatus Willd.	Synonym		WCSP (in review)
Cactus tuberculosus Kuntze	Unresolved		WCSP (in review)
Cactus tubinatus Kuntze	Unresolved		WCSP (in review)
Cactus tuna L.	Unresolved		WCSP (in review)
Cactus tuna var. elatior (Mill.) Sims	Unresolved		WCSP (in review)
Cactus tuna var. nigricans (Haw.) Sims	Unresolved		WCSP (in review)
Cactus tunicatus Lehm.	Synonym		WCSP (in review)
Cactus turbinatus (Hook.) Kuntze	Accepted		TRO
Cactus uberiformis Kuntze	Unresolved		WCSP (in review)
Cactus umbrinus Kuntze	Unresolved		WCSP (in review)
Cactus uncinatus Kuntze	Unresolved		WCSP (in review)
Cactus undulosus Kostel.	Synonym		WCSP (in review)
Cactus urinarius Sessé & Moç. [Unplaced]	Unresolved		WCSP (in review)
Cactus urumbeba Vell.	Unresolved		WCSP (in review)
Cactus variamamma Kuntze	Unresolved		WCSP (in review)
Cactus ventricosus Larrañaga [Unplaced]	Unresolved		WCSP (in review)
Cactus versicolor Kuntze	Unresolved		WCSP (in review)
Cactus verticillatus Brot. ex Heynh.	Unresolved		TRO
Cactus vetulus Kuntze	Unresolved		WCSP (in review)
Cactus villifer Kuntze	Unresolved		WCSP (in review)
Cactus villosus Monv.	Synonym		WCSP (in review)
Cactus virens Kuntze	Unresolved		WCSP (in review)
Cactus viridis Kuntze	Unresolved		WCSP (in review)
Cactus viviparus Nutt.	Unresolved		WCSP (in review)
Cactus voburnensis (Scheer) Kuntze	Synonym		TRO
Cactus vrieseanus Kuntze	Unresolved		WCSP (in review)
Cactus vulpinus Kuntze	Unresolved		WCSP (in review)
Cactus webbianus Kuntze	Unresolved		WCSP (in review)
Cactus wegeneri Kuntze	Unresolved		WCSP (in review)
Cactus wildianus Kuntze	Unresolved		WCSP (in review)
Cactus winkleri Kuntze	Unresolved		WCSP (in review)
Cactus woburnensis Kuntze	Unresolved		WCSP (in review)
Cactus wrightii Kuntze	Unresolved		WCSP (in review)
Cactus xanthotrichus Kuntze	Unresolved		WCSP (in review)
Cactus zegschwitzii Kuntze	Unresolved		WCSP (in review)
Cactus zehntneri Britton & Rose	Synonym		WCSP (in review)
Cactus zephyranthodes Kuntze	Unresolved		WCSP (in review)
Cactus zepnickii Kuntze	Unresolved		WCSP (in review)
Cactus zinniaeflora Moc. & Sessé ex DC.	Unresolved		TRO
Cactus zinniiflorus Moç. & Sessé ex DC.	Unresolved		WCSP (in review)
Cactus zuccarinii (Miq.) Borg	Unresolved		WCSP (in review)