A flowering tree branch, possibly a Caesalpinia species. Watercolour. https://www.rawpixel.com/image/13967097/flowering-tree-branch-possibly-caesalpinia-species-watercolourFree Image from public domain licenseSappanwood tree (Caesalpinia sappan): flowering branch, pod and thorns. Coloured etching by J. Pass, c. 1799, after J. Ihle. https://www.rawpixel.com/image/13954044/image-flower-plant-treeFree Image from public domain license