https://en.wikipedia.org/wiki/Aglaia_odorata

Often called Chinese Lemon Tree, Chinese Perfume Tree and Chinese Rice Flower, Aglaia is found in many parts of Asia and used in traditional Chinese medicine as a tonic, to reduce pain or to cure superficial infections. The tiny yellow flowers have such a powerful fruity, citrusy, floral, green scent that it can be noticed from a distance of several meters.