Horkelia (Horkelia) -

• Santa Rosa Horkelia (Tenuiloba)
  
• Silky Horkelia (Sericata)
  
• Rydberg's Horkelia (Rydbergii)
  
• Threetooth Horkelia (Tridentata)
  Threetooth Horkelia, Threetooth Horkelia
• Ramona Horkelia (Truncata)
  
• Santa Lucia Horkelia (Yadonii)
  
• Barton Flats Horkelia (Wilderae)
  
• Kern Plateau Horkelia (Tularensis)
  
• Parry Horkelia (Parryi)
  
• Point Reyes Horkelia (Marinensis)
  
• Sierra Horkelia (Congesta)
  Sierra Horkelia, Sierra Horkelia
• Cleveland's Horkelia (Clevelandii)
  
• California Horkelia (Californica)
  California Horkelia, California Horkelia, California Horkelia
• Wedgeleaf Horkelia (Cuneata)
  Wedgeleaf Horkelia, Wedgeleaf Horkelia, Wedgeleaf Horkelia
• Carrotleaf Horkelia (Daucifolia)
  Carrotleaf Horkelia, Carrotleaf Horkelia
• White Mountain Horkelia (Hispidula)
  
• Henderson's Horkelia (Hendersonii)
  
• Pinewoods Horkelia (Fusca)
  Bighead Horkelia, Pinewoods Horkelia, Pinewoods Horkelia
• Border Horkelia (Bolanderi)