Eurasian perennial mint have small lilac-blue flowers and ovate leaves; yields an aromatic oil.

synonym: Mentha pulegium.

Dutch: polei
Polish: mięta polej

Erect hairy branching American herb having purple-blue flowers; yields an essential oil used as an insect repellent and sometimes in folk medicine.

synonyms: American pennyroyal, Hedeoma pulegioides.

Dutch: polei