Fishhook Cactus (Sclerocactus) -

• Siler's Pincushion Cactus (Sileri)
  
• Great Basin Fishhook Cactus (Pubispinus)
  
• Desert Valley Fishhook Cactus (Spinosior)
  Blaine Fishhook Cactus, Desert Valley Fishhook Cactus
• Chihuahuan Fishhook Cactus (Uncinatus)
  Chihuahuan Fishhook Cactus, Chihuahuan Fishhook Cactus
• Wright's Fishhook Cactus (Wrightiae)
  
• Whipple's Fishhook Cactus (Whipplei)
  
• Redspined Fishhook Cactus (Polyancistrus)
  
• Scheer's Fishhook Cactus (Scheeri)
  
• Mesa Verde Fishhook Cactus (Mesae-verdae)
  
• Uinta Basin Hookless Cactus (Glaucus)
  
• Nye County Fishhook Cactus (Nyensis)
  
• Paperspine Fishhook Cactus (Papyracanthus)
  
• Smallflower Fishhook Cactus (Parviflorus)
  Intermediate Fishhook Cactus, Smallflower Fishhook Cactus, Longspine Fishhook Cactus
• Shorthook Fishhook Cactus (Brevihamatus)
  Shorthook Fishhook Cactus, Shorthook Fishhook Cactus