oil of pennyroyal

oil of pen·ny·roy·al

either American or European. The American is a volatile oil derived from the flowering tops and leaves of Hedeoma pulegioides (family Labiatae). Contains pulegone and ketones. European is oil of pulegium; a volatile oil from Mentha pulegium (family Labiatae); about 85% pulegone. Has been used as an aromatic carminative, abortifacient, and insect repellent.
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