Hierochloe odorata - Wikipedia https://en.wikipedia.org/wiki/Hierochloe_odorata

"It is used as a smudge, in herbal medicine and in the production of distilled beverages (e.g., "『『『"Żubrówka"』』』", Wisent). It owes its distinctive sweet scent to the presence of "『『『"coumarin."』』』