Trillium undulatum, the painted trillium, is a species of flowering plant in the family Melanthiaceae. It is also known as painted lady (not to be confused with a painted lady butterfly), smiling wake robin, or trille ondulé in French. The plant is found from Ontario in the north to northern Georgia in the south and from Michigan in the west to Nova Scotia in the east. It demands strongly acidic, humus-rich soils and tends to be found in the shade of acid-loving trees such as eastern white pine, ...