Description: Mentha piperita, Griffy site of the Indiana University Research and Teaching Preserve, south side of Griffy Lake east of the causeway, ca. 39.1966, -86.5097, Monroe County, Indiana, 8 Jul 2012. Date: 8 July 2012, 13:25. Source: Mentha piperita. Author: Patrick Alexander from Las Cruces, NM.
Kohler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erlauterndem Texte :.Gera-Untermhaus :Fr. Eugen Kohler,[1883-1914].biodiversitylibrary.org/page/303700