SG Heritage Dictionary

Pennyroyal [Noun] Webster's Dictionary 1828

1. A plant of the genus Mentha.

2. The English pennyroyal is the Mentha pulegium; the noun American pennyroyal is the Cunila pulegioides.

Pennyroyal [Noun] Webster's Dictionary 1913

An aromatic herb (Mentha Pulegium) of Europe; also, a North American plant (Hedeoma pulegioides) resembling it in flavor.