Wild Petunia (Ruellia) -

• Western Wild Petunia (Occidentalis)
  
• Parry's Wild Petunia (Parryi)
  
• Violet Wild Petunia (Nudiflora)
  Violet Wild Petunia, Runyon's Wild Petunia
• Nightflowering Wild Petunia (Noctiflora)
  
• Fringeleaf Wild Petunia (Humilis)
  
• Patula (Patula)
  
• Stalked Wild Petunia (Pedunculata)
  Stalked Wild Petunia, Stalked Wild Petunia
• Minnieroot (Tuberosa)
  
• Yucatan Wild Petunia (Yucatana)
  
• Limestone Wild Petunia (Strepens)
  
• Pursh's Wild Petunia (Purshiana)
  
• Prostrate Wild Petunia (Prostrata)
  
• Drushel's Wild Petunia (Drushelii)
  Drushel's Wild Petunia, Drushel's Wild Petunia
• Drummond's Wild Petunia (Drummondiana)
  
• Softseed Wild Petunia (Malacosperma)
  
• Metz's Wild Petunia (Metziae)
  
• Carolina Wild Petunia (Caroliniensis)
  Carolina Wild Petunia, Carolina Wild Petunia
• Yerba Maravilla (Coccinea)
  
• Tropical Wild Petunia (Brevifolia)
  
• Peruvian Wild Petunia (Chartacea)
  
• Hairyflower Wild Petunia (Ciliatiflora)
  
• Dipteracanthus (Dipteracanthus)
  
• Brazilian Wild Petunia (Devosiana)
  
• Rio Grande Wild Petunia (Davisiorum)
  
• Corzo's Wild Petunia (Corzoi)
  
• Britton's Wild Petunia (Caerulea)