Althea officinalis (Marshmallow)
Arctium lappa (Burdock)
Glycyrrhiza glabra (Licorice)
Linum usitatissimum (Flax, Linseed)
Serenoa repens (Saw palmetto)
Symphytum officinale (Comfrey)
Thymus vulgaris (Thyme)
Ulmus fulva (Slippery elm, American elm)
Verbascum thapsus (Mullein)

References