Althea officinalis (Marshmallow)
Armoracia rusticana (Horseradish)
Calendula officinalis (Marigold)
Chelidonium majus (Celandine)
Commiphora molmol (Myrrh)
Echinacea angustifolia (Purple cone flower)
Grindelia camporum (Gumweed)
Hamamelis virginiana (Witch hazel)
Hypericum perforatum (St. John's wort)
Symphytum officinale (Comfrey)
Ulmus fulva (Slippery elm, American elm)

References