Osmanthus Plant / Osmanthus fragrans aurantiacus – Nurseries Caroliniana / Osmanthus / ɒ z ˈ m æ n θ ə s / is a genus of about 30 species of flowering plants in the family oleaceae.most of the species are native to eastern asia (china, japan, korea, indochina, the himalayas, etc.) with a few species from the caucasus, new caledonia, and sumatra.