Bladder wrack (Fucus vesiculosus) illustration. Digitally enhanced from our own book, Medical Botany (1836) by John… https://www.rawpixel.com/image/327079/free-illustration-image-watercolor-flowerFree Image from public domain licenseBladder wrack (Fucus vesiculosus) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. https://www.rawpixel.com/image/327055/premium-illustration-psd-jame-morss-churchill-antique-bladder-wrackView license