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Cacteae
Cacteae is a tribe of plants belonging to the family Cactaceae. They consist of species that either have no leaves at all, or have stems that resemble leaves. Some have scales that resemble leaves, but the majority have leaf-bases that have been fused either into ribs or tubercles.
The Cacteae tribe is very large, comprising almost 75% of all the Cactaceae. As a result it has been sub-divided into eight sub-tribes, these being as follows: Cactanae, Cactinae, Cereinae, Echinocactinae, Echinocereinae, Epiphyllinae, Hylocereinae, and Rhipsalidinae. Members of this tribe have been moved around and often placed in other tribes.
== Cactanae ==
Similar to Echinocactinae, these plants tend to have either globular or stumpy cylindrical main stems. They don't branch, but may produce offshoots from the base. They have ribs that are fused together tubercles, so much so that there is only a vague bump where the areoles are. The plants also develop a pronounced, wooly, and occasionally bristly cephalium from which the flowers appear. There are only two genera comprising this subtribe, Discocactus and Melocactus.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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