Achillea millefolium (Yarrow)
Angelica sinensis (Dong quai)
Berberis vulgaris (Barberry)
Capsicum frutescens (Cayenne, Red pepper)
Ephedra sinica (Ma huang)
Glycyrrhiza glabra (Licorice)
Hydrastis canadensis (Goldenseal)
Larrea tridentata (Chapparrel, Creosote bush, Creosotum)
Linum usitatissimum (Flax, Linseed)
Spilanthes acmella (Paracress)
Scutellaria laterifolia (Skullcap)
Urtica urens (Nettles)

References