| Sclerocactus blainei S.L. Welsh & K.H. Thorne |
Accepted |
 |
TRO |
| Sclerocactus brevihamatus (Engelm.) D.R. Hunt |
Synonym |
 |
TRO |
| Sclerocactus brevihamatus subsp. tobuschii (W.T. Marshall) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus brevispinus K.D. Heil & J.M. Porter |
Accepted |
 |
TRO |
| Sclerocactus cloverae K.D. Heil & J.M. Porter |
Accepted |
 |
TRO |
| Sclerocactus cloverae subsp. brackii K.D. Heil & J.M. Porter |
Synonym |
 |
TRO |
| Sclerocactus contortus K.D. Heil |
Synonym |
 |
TRO |
| Sclerocactus erectocentrus (J.M. Coult.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus franklinii J.W.Evans |
Unresolved |
 |
WCSP (in review) |
| Sclerocactus glaucus (K. Schum.) L.D. Benson |
Accepted |
 |
TRO |
| Sclerocactus havasupaiensis Clover |
Synonym |
 |
TRO |
| Sclerocactus havasupaiensis var. roseus Clover |
Synonym |
 |
TRO |
| Sclerocactus intermedius Peebles |
Synonym |
 |
TRO |
| Sclerocactus intertextus (Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus intertextus var. dasyacanthus (Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus johnsonii (Parry ex Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus mariposensis (Hester) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus mesae-verdae (Boissev. & C. Davidson) L.D. Benson |
Accepted |
 |
TRO |
| Sclerocactus nyensis Hochstätter |
Accepted |
 |
TRO |
| Sclerocactus papyracanthus (Engelm.) N.P. Taylor |
Accepted |
 |
TRO |
| Sclerocactus parviflorus Clover & Jotter |
Accepted |
 |
TRO |
| Sclerocactus parviflorus subsp. havasupaiensis (Clover) Hochstätter |
Synonym |
 |
TRO |
| Sclerocactus parviflorus var. intermedius (Peebles) D. Woodruff & L.D. Benson |
Synonym |
 |
TRO |
| Sclerocactus parviflorus subsp. terrae-canyonae (K.D. Heil) K.D. Heil & J.M. Porter |
Synonym |
 |
TRO |
| Sclerocactus polyancistrus (Engelm. & J.M. Bigelow) Britton & Rose |
Accepted |
 |
TRO |
| Sclerocactus pubispinus (Engelm.) L.D. Benson |
Accepted |
 |
TRO |
| Sclerocactus pubispinus var. sileri L.D. Benson |
Synonym |
 |
TRO |
| Sclerocactus pubispinus var. spinosior (Engelm.) S.L. Welsh |
Synonym |
 |
TRO |
| Sclerocactus scheeri (Salm-Dyck) N.P. Taylor |
Accepted |
 |
TRO |
| Sclerocactus schlesseri K.D. Heil & S.L. Welsh |
Synonym |
 |
TRO |
| Sclerocactus sileri (L.D. Benson) K.D. Heil & J.M. Porter |
Accepted |
 |
TRO |
| Sclerocactus spinosior (Engelm.) D. Woodruff & L.D. Benson |
Accepted |
 |
TRO |
| Sclerocactus spinosior subsp. blainei (S.L. Welsh & K.H. Thorne) Hochstätter |
Synonym |
 |
TRO |
| Sclerocactus spinosior var. blainei (S.L. Welsh & K.H. Thorne) R. May |
Synonym |
 |
TRO |
| Sclerocactus terrae-canyonae K.D. Heil |
Synonym |
 |
TRO |
| Sclerocactus uncinatus (Galeotti ex Pfeiff.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus uncinatus var. crassihamatus (F.A.C. Weber) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus uncinatus subsp. crassihamatus (F.A.C. Weber) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus uncinatus var. wrightii (Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus uncinatus subsp. wrightii (Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus unguispinus (Engelm.) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus unguispinus var. durangensis (Ruenge) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus warnockii (L.D. Benson) N.P. Taylor |
Synonym |
 |
TRO |
| Sclerocactus wetlandicus Hochstätter |
Accepted |
 |
TRO |
| Sclerocactus wetlandicus var. ilseae Hochstätter |
Synonym |
 |
TRO |
| Sclerocactus whipplei (Engelm. & J.M. Bigelow) Britton & Rose |
Accepted |
 |
TRO |
| Sclerocactus whipplei var. glaucus (K. Schum.) S.L. Welsh |
Synonym |
 |
TRO |
| Sclerocactus whipplei var. heilii Castetter, P. Pierce & K.H. Schwer. |
Synonym |
 |
TRO |
| Sclerocactus whipplei var. intermedius (Peebles) L.D. Benson |
Synonym |
 |
TRO |
| Sclerocactus whipplei var. pygmaeus Peebles |
Synonym |
 |
TRO |
| Sclerocactus whipplei var. reevesii Castetter, P. Pierce & K.H. Schwer. |
Synonym |
 |
TRO |
| Sclerocactus whipplei var. roseus (Clover) L.D. Benson |
Synonym |
 |
TRO |
| Sclerocactus wrightiae L.D. Benson |
Accepted |
 |
TRO |