There are three species of the genus introduced and cultivated in southern China, including the ancient city rose tree (Ochrosia elliptica Labill). ), rose tree (O. borbonica Gmel. ) and the rose tree (Ochrosia coccinea). Rosewood is the most beautiful tree with flowers and fruits among the three. Of tropical Asia. It is a small evergreen tree; The whole plant is milky white, the stems and branches are gray, and the plants are green and tender. Beautiful leaves, nearly leathery or papery, usually 3 leaves, and flowers as white and fragrant as ivory. This strange plant can be seen in the tropical rain forest greenhouse in south china botanical garden.