Wild lettuce (Lactuca virosa) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John Stephenson… https://www.rawpixel.com/image/326934/free-illustration-image-opium-lettuce-lactuca-virosaFree Image from public domain licenseVintage yellow and white lettuce flowers png illustration https://www.rawpixel.com/image/2611577/free-illustration-png-herbal-lactuca-virosaView licenseFour poisonous plants: hemlock (Conium maculatum), henbane (Hyoscyamus niger), opium lettuce (Lactuca virosa) and autumn… https://www.rawpixel.com/image/13961869/image-flower-plant-medicineFree Image from public domain licenseOpium lettuce (Lactuca virosa): entire flowering and fruiting plant. Coloured etching by C. Pierre, c. 1865, after P. Naudin. https://www.rawpixel.com/image/13950973/image-flower-plant-medicineFree Image from public domain licenseWild lettuce (Lactuca virosa) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. https://www.rawpixel.com/image/326989/premium-illustration-psd-botanical-poison-opium-tall-plantView license