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pennyroyal, American pennyroyal, Hedeoma pulegioides | erect hairy branching American herb having purple-blue flowers; erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine ❲Hedeoma pulegioides❳ | ||
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pennyroyal, Mentha pulegium | Eurasian perennial mint have small lilac-blue flowers and ovate leaves; Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil ❲Mentha pulegium❳ |