Orbea umbracula is a small succulent with mottled greyish-green stems with conspicuously large, ascending or spreading tubercular teeth…
Meaning: Shade, shelter; parasol, umbrella
Derivation: Plural form of the Latin noun "umbraculum."
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.