Two plants, holy thistle (Silybum marianum) and Canada thistle (Cirsium arvense): flowering and fruiting stems. Coloured… https://www.rawpixel.com/image/13959347/image-flower-plant-medicineFree Image from public domain licenseAalbes (Ribes rubrum) en mariadistel (Silybum marianum) (1640) by anonymous and Crispijn van de Passe I https://www.rawpixel.com/image/13795669/image-paper-butterfly-frameFree Image from public domain license