Mentha javanica - Photograph of the plant in flower. Mentha dimenica - Image of flowers of this plant. Mentha longifolia - Description, uses, propagation, distribution, and references. Mentha aquatica - photo Mentha gracilis - photo Mentha pulegium: Pennyroyal - Information on this species and the uses to which it is put. Mentha x piperita - Description of Peppermint and two photographs. Mentha arvensis - Two photographs of Corn Mint and some identifying features. Mentha aquatica - Description of Water Mint and two photographs. Mentha spicata agg - Photographs and information on Spearmint and Applemint. Mentha piperita: Peppermint - Photograph of this plant and details of its documented properties and actions and the chemicals it contains, with some other information from various sources. Peppermint - Research project by Nicole Johnson at the University of Wisconsin-LaCrosse. Mentha and Schizonepeta - Provides information about these Chinese herbs that are frequently combined in formulas for treatment of skin eruptions, sinus infections, headaches, common cold and influenza. Mentha canadensis - Photograph, description, distribution, ecology and economic significance. Mentha pulegium - Horticultural data and distribution of Mentha pulegium.