DEUTZIA, doit'sĭ-ạ, or dūt'sĭ-ạ (so named in honor of the Dutch botanist Deutz), a genus of plants of the family Hydrangeaceæ, containing 50 species, all of which are interesting for the beauty of their flowers. Some of the species are cultivated in America as hothouse flowers or ornamental shrubs. The nearest relatives growing wild in the United States are the syringas (Philadelphus). The deutzias are small shrubs indigenous to Asia, one species occurring in Mexico. They are covered with stiff stellar hairs, on which account one species (D. scabra) is used by joiners in Japan to polish wood. The flowers are arranged in thyrsi like the lilac.