Euphorbia abyssinica J.F. Gmel. (Ethiopian Tree-Spurge): finished drawing of single trunk, with details of whole and… https://www.rawpixel.com/image/9198561/image-watercolors-vintage-public-domainFree Image from public domain licenseEuphorbia abyssinica J.F. Gmel. (Ethiopian Tree-Spurge): finished drawing of the tree's habit by Luigi Balugani https://www.rawpixel.com/image/9202559/image-watercolors-vintage-treesFree Image from public domain license