== Histoire ==
<gallery widths=120px heights=120px perrow=9 caption="illustrations historiques">
File:Krotôn ê kêki 170v Dioscoride Vienne.png|krotôn ê kêki folio 170v, Dioscoride, ''Codex Vindobonensis Med. Gr. I''
File:Ricinus communis - Köhler–s Medizinal-Pflanzen-257.jpg|Köhler, 1897. ''Medizinal-Pflanzen''
</gallery>