Originally, the Mullein-which has large, oval, woolly leaves- and the Cowslip were included under one common Latin name, verbascum; for which reason the attributes of the Mullein still remain accredited by mistake to the second plant.
"Herbal Simples Approved for Modern Uses of Cure"
William Thomas Fernie
My notes are explicit on the subject of some of them, taken on verbascum sinuatum.
"More Hunting Wasps"
J. Henri Fabre