Close up of green tapioca bubbles with effect https://www.rawpixel.com/image/392268/free-photo-image-bubbles-water-world-tapiocaView licenseCassava or tapioca plant (Manihot esculenta): leafy stem and tuberous roots. Coloured etching by J. Pass, c. 1809. https://www.rawpixel.com/image/13958076/image-flower-plant-medicineFree Image from public domain license