Opuntia macrocentra (Long-spined Purplish Prickly Pear) is a shrubby cactus with erect to decumbent branches composed of flat green pads…
Meaning: Large centers
Derivation: Compound of two words, the prefix "macro-," meaning "large or long," and the plural form of the Latin noun "centrum," meaning "center."
Whereas the generic name must be unique, there are often two or more genera with the same specific epithet. The same epithet can also be used within a species for subspecies, varieties, and forms.
Here is a full list of succulents with this epithet. Click on the photo or the name of the plant for which you wish to see further information.