Yours, Etc.: Origins and Uses of 8 Sign-Offs
late 14c., from Latin asphodelus, from Greek asphodelos "asphodel, king's spear," of unknown origin (see daffodil). Taken in poetic use for a mythical deathless flower that overspreads the Elysian meadows.
To embathe In nectared lavers strewed with asphodel. [Milton, "Comus," 1634]