A mint plant (Mentha viridis): flowering stem, leaf and floral segments. Coloured engraving after J. Sowerby, 1812. https://www.rawpixel.com/image/13968804/image-flower-plant-grassFree Image from public domain licenseCorn mint (Mentha arvensis): flowering stem, roots and floral segments. Coloured engraving after J. Sowerby, 1810. https://www.rawpixel.com/image/13963439/image-cartoon-flower-plantFree Image from public domain licenseA mint plant (Mentha species) with an associated moth or butterfly and its anatomical segments. Coloured etching, c. 1830. https://www.rawpixel.com/image/13954337/image-butterfly-flower-plantFree Image from public domain licensePennyroyal (Mentha pulegium) and creeping thyme (Thymus serpyllum): entire flowering plants. Coloured etching by C. Pierre… https://www.rawpixel.com/image/14018073/image-flower-plant-grassFree Image from public domain licenseHorsemint (Mentha longifolia (L.) Huds.): entire flowering plant with separate flower. Coloured engraving after F. von… https://www.rawpixel.com/image/13992183/image-flower-plant-grassFree Image from public domain licensePennyroyal (Mentha pulegium) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John Stephenson… https://www.rawpixel.com/image/326706/free-illustration-image-mint-mentha-pennyroyalFree Image from public domain licensePennyroyal (Mentha pulegium) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. https://www.rawpixel.com/image/327225/premium-illustration-psd-mentha-mint-plant-botanical-pennyroyalView license