Mammillaria longimamma (Finger Cactus) is a small cactus with green stems covered with long tubercles tipped with scant white wool and a…
Meaning: Long breast
Derivation: Compound of the Latin words, the adjective "longus," meaning "far, long" or "extended, prolonged," and the noun "mamma," meaning "breast."
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.