https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014689Edit ImageSaveSaveEditCropCustom TextTwo plants, one possibly a knotweed (Polygonum species). Watercolour.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 956 px | 300 dpiLarge JPEG 3000 x 2391 px | 300 dpiFree DownloadTwo plants, one possibly a knotweed (Polygonum species). Watercolour.More