Mullein (Verbascum thapsus) is one of the most recognizable herbs in the wild—but only if you know what to look for. With its towering yellow flower stalk and fuzzy, soft leaves, mullein stands out in fields and roadsides. In this guide, we’ll show you how to identify mullein confidently, avoid toxic look-a-likes like foxglove, and explore how this ancient lung-supporting herb is being used today in everything from teas and tinctures to tasty modern gummies.