bastard pennyroyal noun4 •Plants in the mint family, Lamiaceae, native to North America and having a pennyroyal-like scent. •Bluecurls Trichostema dichotomum, native to the eastern US. •A plant of species Trichostema setaceum (Trichostema lineare in older references), also native to the eastern US, which is usually qualified as linear-leaved or narrow bastard pennyroyal. •Mustang mint, mustang monardella (Monardella lanceolata), native to California and Baja California.
