https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8919821
Echinops sphaerocephalus (common thistle ball);Carthamus tinctorius (yellow safflower thistle) by Maria Sibylla Merian
Original public domain image from Statens Museum for Kunst
Public DomainFree CC0 image for Personal and Business use