| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Sclerocactus | scheeri | 105 |
| 2 | Sclerocactus | parviflorus | 72 |
| 3 | Sclerocactus | uncinatus | 35 |
| 4 | Sclerocactus | brevihamatus | 25 |
| 5 | Sclerocactus | glaucus | 14 |
| 6 | Sclerocactus | johnsonii | 12 |
| 7 | Sclerocactus | contortus | 5 |
| 8 | Sclerocactus | whipplei | 4 |
| 9 | Sclerocactus | nyensis | 4 |
| 10 | Sclerocactus | polyancistrus | 4 |
| 11 | Sclerocactus | spinosior | 2 |
| 12 | Sclerocactus | pubispinus | 2 |
| 13 | Sclerocactus | wrightiae | 2 |
| 14 | Sclerocactus | schlesseri | 1 |
| 15 | Sclerocactus | intertextus | 1 |
| 16 | Sclerocactus | papyracanthus | 1 |
| 17 | Sclerocactus | brevispinus | 1 |