Hierochloe odorata or Anthoxanthum nitens (commonly known as sweet grass, manna grass, Mary’s grass, or vanilla grass, and as holy grass in the UK, bison grass in Poland) is an aromatic herb native to northern Eurasia and North America. It is used 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. This variety of grass is different from the species commonly known as buffalo grass (Stenotaphrum secundatum) in Australia.