https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13968551Edit ImageSaveSaveEditCropCustom TextThree flowerheads from different cultivars of garden verbena (Verbena x hybrida) Coloured zincograph by C. Rosenberg, c. 1850, after himself.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 834 x 1200 px | 300 dpiLarge JPEG 1492 x 2148 px | 300 dpiFree DownloadThree flowerheads from different cultivars of garden verbena (Verbena x hybrida) Coloured zincograph by C. Rosenberg, c. 1850, after himself.More