| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Ferocactus | wislizeni | 4499 |
| 2 | Ferocactus | cylindraceus | 3980 |
| 3 | Ferocactus | hamatacanthus | 286 |
| 4 | Ferocactus | viridescens | 270 |
| 5 | Ferocactus | pilosus | 228 |
| 6 | Ferocactus | histrix | 164 |
| 7 | Ferocactus | latispinus | 163 |
| 8 | Ferocactus | echidne | 90 |
| 9 | Ferocactus | emoryi | 65 |
| 10 | Ferocactus | townsendianus | 60 |
| 11 | Ferocactus | gracilis | 55 |
| 12 | Ferocactus | glaucescens | 40 |
| 13 | Ferocactus | robustus | 38 |
| 14 | Ferocactus | herrerae | 33 |
| 15 | Ferocactus | recurvus | 32 |
| 16 | Ferocactus | peninsulae | 18 |
| 17 | Ferocactus | macrodiscus | 15 |
| 18 | Ferocactus | fordii | 14 |
| 19 | Ferocactus | flavovirens | 14 |
| 20 | Ferocactus | reppenhagenii | 12 |
| 21 | Ferocactus | rectispinus | 6 |
| 22 | Ferocactus | pottsii | 5 |
| 23 | Ferocactus | chrysacanthus | 4 |
| 24 | Ferocactus | diguetii | 4 |
| 25 | Ferocactus | haematacanthus | 3 |
| 26 | Ferocactus | stainesii | 3 |
| 27 | Ferocactus | santa-maria | 2 |
| 28 | Ferocactus | lindsayi | 1 |
| 29 | Ferocactus | alamosanus | 1 |
| 30 | Ferocactus | viscainensis | 1 |