Abstract: A first functional man-made ornamental plant comprises a foliage-floral part L of a man-made ornamental plant having a thin layer AB of a composition comprising an inorganic particulate substance having photocatalyst activity (a) and a binder which is inorganic or has been made inorganic (b) preferably on top of an under-coat layer B of the binder which is inorganic or has been made inorganic (b). A second functional man-made ornamental plant is characterized in that the foliage-floral part L of a man-made ornamental plant is molded from a composition comprising a matrix resin and, as incorporated therein, an inorganic particulate substance having photocatalyst activity (a). Preferably, the surface of the molded foliage-floral part L is delicately roughened.