- Cactaceae - Cactus Family
- Subfamily Pereskioideae: broad leaves, no glochids.
Maihuenia, Pereskia
(or Maihuenia may be separated into Subfamily Maihuenioideae.)
- Subfamily Opuntioideae: fleshy round leaves present or absent, glochids present.
Austrocylindropuntia, Brasiliopuntia, Cylindropuntia, Cumulopuntia, Grusonia, Micropuntia, Opuntia, Pereskiopsis, Pterocactus, Quiabentia, Tacinga, Tephrocactus, Tunilla.
- Subfamily Cactoideae: no leaves*, no glochids. (incomplete list of genera)
Ariocarpus, Astrophytum, Aztekium, Blossfeldia, Carnegiea, Cereus, Cleistocactus, Copiapoa, Coryphantha, Echinocactus, Echinocereus, Echinomastus, Echinopsis, Epithelantha, Escobaria, Ferocactus, Geohintonia, Hylocereus, Leuchtenbergia, Lobivia, Lophocereus, Lophophora, Mammillaria, Matucana, Melocactus, Neolloydia, Obregonia, Pachycereus, Parodia, Pelecyphora, Pilosocereus, Pediocactus, Peniocereus, Rebutia, Rhipsalis, Sclerocactus, Schlumbergera, Stenocactus, Strombocactus, Thelocactus, Trichocereus, Turbinocarpus, Uebelmannia, Wilcoxia and all other genera.
*Except that some species have seed leaves.
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