Public Domainhttps://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/2630534SaveSaveThistle (Cirsium arizonica) (1938) by Mary Vaux Walcott. Original from The Smithsonian. Digitally enhanced by rawpixel.MorePublic DomainFree CC0 ImageInfoView LicenseJPEGTIFFSmall JPEG 857 x 1200 px | 300 dpiLarge JPEG 2500 x 3500 px | 300 dpiOriginal JPEG 4553 x 6374 px | 300 dpiTIFF 4553 x 6374 px | 300 dpi | 166.1 MBSay thanks by supporting these good causesThe Public Domain Review SaveDownloadThistle (Cirsium arizonica) (1938) by Mary Vaux Walcott. Original from The Smithsonian. Digitally enhanced by rawpixel.More