pennyroyal
- n Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil
- n erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine
- The list: aristolochic acid (birthwort), comfrey, germander, androstenedione, chaparral, kava, bitter orange, organ or gland extracts, lobelia, pennyroyal oil, scullcap and yohimbe.
- The list: aristolochic acid (birthwort), comfrey, germander, androstenedione, chaparral, kava, bitter orange, organ or gland extracts, lobelia, pennyroyal oil, scullcap and .
- Nonetheless, a demand persists for senna, henna, pennyroyal, hops, boneset, camomile, sage, tansy, flaxseed, rhubarb, ginger root, fennel seed, aniseed, saffron, viburnum.