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Cactus From Wikipedia, the free encyclopedia Jump to navigation Jump to search This article is about the plant family. For the former genus Cactus , see Mammillaria , Melocactus , and Opuntia . For other uses, see Cactus (disambiguation) . "Cacti" redirects here. For the software, see Cacti (software) . Cactus Temporal range: 35–0 Ma Pre๊ ๊ O S D C P T J K Pg N Late Eocene - Recent Various Cactaceae Scientific classification Kingdom: Plantae Clade : Tracheophytes Clade : Angiosperms Clade : Eudicots Order: Caryophyllales Family: Cactaceae Juss. [1] Subfamilies Cactoideae Maihuenioideae Opuntioideae Pereskioideae See also Classification of the Cactaceae Synonyms [2] Opuntiaceae Desv. Leuchtenbergiaceae Salm-Dyck ex Pfeiff. Cultivated cacti in the Singapore Botanic Gardens Many species of cactus have long, sharp spines , like this Opuntia . A cactus (plural cacti...