The African Lily or blue Agapanthus.
an African plant (Agapanthus africanus) of the lily family with blue or white, funnel-shaped flowers
A rhizomatous plant (Agapanthus africanus) of South Africa, grown especially for its umbels of blue, violet, or white funnel-shaped flowers. Also called agapanthus, lily of the Nile.
(plural African lilies)