High Quality Content by WIKIPEDIA articles! Curtisia dentata (commonly known as the Assegai tree, Umlahleni or Cape Lancewood) is a flowering tree from Southern Africa. It is the sole species in genus Curtisia, which was originally classed as a type of "Dogwood" (Cornaceae), but is now placed in its own unique family Curtisiaceae. It is increasingly popular as an ornamental tree for gardens, with dark glossy foliage and sprays of pure white berries.