Caption:
Four opposing leaves on a single stem of Inula helenium. Yellowhead. Mokkou.. Colour-printed woodblock engraving by Kan'en Iwasaki from "Honzo Zufu," an Illustrated Guide to Medicinal Plants, 1884. Iwasaki (1786-1842) was a Japanese botanist, entomologist and zoologist. He was one of the first Japanese botanists to incorporate western knowledge into his studies.