Cactus Family (Cactaceae) -

• Wigginsia (Wigginsia)
  
• Trichocereus (Trichocereus)
  
• Eccremocactus (Eccremocactus)
  
• Echinocactus (Echinocactus)
  Devilshead, Cottontop Cactus, Horse Crippler
• Cylindropuntia (Cylindropuntia)
  Gander's Buckhorn Cholla, Tree Cholla, Candle Cholla
• Thelocactus (Thelocactus)
  Glory Of Texas, Miniature Barrel Cactus
• Stenocereus (Stenocereus)
  Spanish Stenocereus, Organpipe Cactus
• Rhipsalis (Rhipsalis)
  Mistletoe Cactus
• Fishhook Cactus (Sclerocactus)
  Shorthook Fishhook Cactus, Uinta Basin Hookless Cactus, Mesa Verde Fishhook Cactus
• Schlumbergera (Schlumbergera)
  False Christmas Cactus
• Moonlight Cactus (Selenicereus)
  Coneflower Moonlight Cactus, Queen Of The Night, Princess Of The Night
• Beehive Cactus (Coryphantha)
  Rhinoceros Cactus, Nipple Beehive Cactus, Nickels' Cactus
• Corryocactus (Corryocactus)
  
• Snakecactus (Bergerocactus)
  Golden Snakecactus
• Borzicactus (Borzicactus)
  
• Astrophytum (Astrophytum)
  Sanddollar, Bishop's Hat
• Livingrock (Ariocarpus)
  Chautle Livingrock
• Triangle Cactus (Acanthocereus)
  Triangle Cactus
• Brasiliopuntia (Brasiliopuntia)
  Brazilian Pricklypear
• Saguaro (Carnegiea)
  Saguaro
• Consolea (Consolea)
  Semaphore Pricklypear, Tuna, Sour Pricklypear
• Cleistocactus (Cleistocactus)
  
• Sweetpotato Cactus (Cereus)
  Lady Of The Night Cactus, Hedge Cactus
• Cephalocereus (Cephalocereus)
  
• Rebutia (Rebutia)
  
• Tree Cactus (Pilosocereus)
  Key Tree Cactus, Royen's Tree Cactus
• Hamatocactus (Hamatocactus)
  
• Grusonia (Grusonia)
  Big Bend Pricklypear, Club Cholla, Devil Cholla
• Applecactus (Harrisia)
  Prickly Applecactus, Fragrant Applecactus, Caribbean Applecactus
• Hatiora (Hatiora)
  Easter Cactus
• Nightblooming Cactus (Hylocereus)
  Costa Rica Nightblooming Cactus, Strawberry-pear, Nightblooming Cactus
• Barrel Cactus (Ferocactus)
  San Diego Barrelcactus, Turk's Head, Candy Barrelcactus
• Foxtail Cactus (Escobaria)
  Spinystar, Column Foxtail Cactus, Cushion Foxtail Cactus
• Echinomastus (Echinomastus)
  Redspine Fishhook Cactus, Top Cactus, White Fishhook Cactus
• Echinopsis (Echinopsis)
  Cardón
• Climbing Cactus (Epiphyllum)
  Orchid Cactus, Climbing Cactus, Orchid Cactus
• Pingpong Ball Cactus (Epithelantha)
  Pingpong Ball Cactus, Pingpong Ball Cactus
• Leptocereus (Leptocereus)
  Sebucan, Pitahaya
• Lobivia (Lobivia)
  
• Parodia (Parodia)
  
• Pachycereus (Pachycereus)
  Senita Cactus
• Hedgehog Cactus (Pediocactus)
  Brady's Hedgehog Cactus, Despain's Pincushion Cactus, Park Hedgehog Cactus
• Peniocereus (Peniocereus)
  Nightblooming Cereus, Gearstem Cactus
• Pereskia (Pereskia)
  Barbados Shrub, Rose Cactus
• Pricklypear (Opuntia)
  Chenille Pricklypear, Devil's-tongue, Border Pricklypear
• Neolloydia (Neolloydia)
  Chihuahuan Beehive
• Lophophora (Lophophora)
  Peyote
• Globe Cactus (Mammillaria)
  Greenflower Nipple Cactus, Strawberry Cactus, Graham's Nipple Cactus
• Melocactus (Melocactus)
  Turk's Cap
• Notocactus (Notocactus)
  
• Hedgehog Cactus (Echinocereus)
  Nylon Hedgehog Cactus, Scarlet Hedgehog Cactus, Spiny Hedgehog Cactus