  |
  |
| Ferocactus glaucescens |   |
|
Ferocactus gracilis ssp. gracilis |
  |
  |
  |
|
Ferocactus hamatacanthus ssp. hamatacanthus |
  |
|
Ferocactus hamatacanthus ssp. sinuatus |
  |
| Ferocactus histrix |   |
| Ferocactus johnstonianus |   |