Aaron's rod Aaron's rod /ˈærənz ˈrɒd/

noun

1. Tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches  ( Aaron's rod , common mullein , flannel mullein , great mullein , torch , Verbascum thapsus , woolly mullein )
   tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches