Dried slices of the root of Dahurian angelica, with a strong aromatic smell and a pungent taste. A slice or two goes into braised meats and mutton soup to cover gamey smells; too much makes the dish bitter.
Adding a few slices of báizhǐ to the braising liquid makes it more fragrant.
Tips
culture
TCM staple - prescribed for headaches, sinus congestion, and toothache, and a regular ingredient in 卤味 (braised meats) and 火锅 spice mixes for its warm, slightly sweet aroma.
memory
白 ('white') describes the pale color of the root; 芷 is the classical name for fragrant marsh herbs (it appears in 《楚辞》).