https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14001128Edit ImageSaveSaveEditCropCustom TextKnapweed (Centaurea sp.): flowering stem, leaf and floral segments. Etching, c. 1718, after C. Aubriet.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 822 x 1200 px | 300 dpiLarge JPEG 1410 x 2059 px | 300 dpiFree DownloadKnapweed (Centaurea sp.): flowering stem, leaf and floral segments. Etching, c. 1718, after C. Aubriet.More