Definition of "mullein"
mullein
/ˈmʌlɪn/
noun
usually uncountable, plural mulleins
Any of a few hundred species of European and Asian plants, of the genus Verbascum, especially that majority that have yellow flowers. Some species have been introduced to other continents, where some are now seen as invasive pests. Some species, though far from all, have downy leaves, hence common names such as: "velvet plant".