This plant has woolly, grey-green, oval leaves, and spikes of bright yellow five-petalled flowers. Both leaves and flowers are used.
It is bitter herb which contains mucilage, flavonoids, volatile oil and tannins.
It soothes and lubricates tissues, promotes healing, and has diuretic, analgesic, expectorant and antiseptic effects.
Mullein is valuable for treating coughs and catarrh, and is specific for tracheitis and bronchitis.