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Agapanthus inapertus was created in 1910.
An agapanthus is a member of the family Agapanthus of flowering plants, some species include the African lily or the lily of the Nile.
You probably mean 'Agapanthus': http://en.wikipedia.org/wiki/Agapanthus
An African lily is a flowering plant of the genus Agapanthus, especially Agapanthus umbellatus.
The scientific or taxonomic name would be Agapanthus orientalis (A. praecox ssp. orientalis).