elderflower

:  the flower of an elderberry (such as Sambucus nigra) used especially in making wines, liqueurs, and teas On its own, this 40-proof liqueur, said to be the first made from fresh elderflowers hand-picked in the Alps and macerated in eau de vie, is pretty intense unless it's cut with ice and a splash of soda. — Florence Fabricant … Percy heaved an impressive sigh and took a deep swig of elderflower wine … — J. K. Rowling