This pungent herb grows in the path near the number 12 marker on the Swamp Trail. It also looses its reddish hue as the temperatures rise. Light blue to light lilac colored flowers form whorls along the main stem, very similar to horehound. The dried flower stalks often persist in the landscape through the winter. Pennyroyal is used as a household ant and flea repellent.
Warning causes internal bleeding and death if ingested as a tea or oil.
We will be attempting to eliminate this toxic non-native herb from the preserve.