N. L. BRITTON and J. N. ROSE (1919)

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Uno dei libri cardine per gli appassionati di Cactaceae, forse ormai un poco datato ma sicurmanete da avere come punto di riferimento

Volume 1 (Pereskiopsis, Pterocactus, Nopalea, Tacinga, Maihuenia, Opuntia)

Volume 2 (Monvillea, Cephalocereus, Espostoa, Browningia, Stetsonia, Escontria, Corryocactus, Pachycereus, Leptocereus, Eulychnia, Lemaireocereus, Erdisia, Bergerocactus, Leocereus, Wilcoxia, Peniocereus, Dendrocereus, Machaerocereus, Nyctocereus, Brachycereus, Acanthocereus, Heliocereus, Trichocereus, Jasminocereus, Harrisia, Borzicactus, Carnegiea, Binghamia, Rathbunia, Arrojadoa, Oreocereus, Facheiroa, Cleistocactus, Zehntnerella, Lophocereus, Myrtillocactus, Neoraimondia, Hylocereus, Wilmattea, Selenicereus, Mediocactus, Deamia, Weberocereus, Werckleocereus, Aporocactus, Strophocactus)

Volume 3 (Echinocereus, Austrocactus, Rebutia, Chamaecereus, Lobivia, Echinopsis, Denmoza, Ariocarpus, Lophophora, Copiapoa, Pediocactus, Toumeya, Epithelantha, Neoporteria, Arequipa, Oroya, Matucana, Hamatocactus, Strombocactus, Leuchtenbergia, Echinofossulocactus, Ferocactus, Echinomastus, Gymnocalycium, Echinocactus, Homalocephala, Astrophytum, Eriosyce, Malacocarpus, Hickenia, Frailea, Mila, Sclerocactus, Utahia, Discocactus, Cactus)

Volume 4 (Ancistrocactus, Thelocactus, Neolloydia, Mamillopsis, Cochemiea, Coryphantha, Neobesseya, Escobaria, Bartschella, Pelecyphora, Phellosperma, Dolichothele, Solisia, Neomammillaria, Zygocactus, Epiphyllanthus, Schlumbergera, Epiphyllum, Disocactus, Chiapasia, Eccremocactus, Nopalxochia, Wittia, Erythrorhipsalis, Rhipsalidopsis, Pfeiffera, Acanthorhipsalis, Pseudorhipsalis, Lepismium, Hatiora, Rhipsalis).