Four flowering plants, including watercress (Nasturtium officinale). Chromolithograph by W. Dickes & co., c. 1855. https://www.rawpixel.com/image/13970568/image-flower-plant-medicineFree Image from public domain licenseWatercress (Nasturtium officinale R.Br.): entire flowering and fruiting plant with separate calyx, fruit and seeds. Coloured… https://www.rawpixel.com/image/13971926/image-flower-plant-medicineFree Image from public domain licenseWatercress (Nasturtium officinale): flowering stem, leaf and floral segments. Coloured engraving after J. Sowerby, 1801. https://www.rawpixel.com/image/13983133/image-flower-plant-artFree Image from public domain license