Couch grass (Elymus repens): flower and seedheads with roots and floral segments. Chromolithograph, c. 1887, after W. Müller. https://www.rawpixel.com/image/13961437/image-flowers-plant-grassFree Image from public domain licenseCouch grass (Elymus repens) with an associated insect and its abdominal segments. Coloured etching, c. 1830. https://www.rawpixel.com/image/14008894/image-plant-grass-artFree Image from public domain license