Trillium grandiflorum (American wake-robin)
find it in the American section
Family: Melanthiaceae Origin:
Eastern North America
Trillium are herbaceous perennials with erect stems bearing a whorl of ovate or diamond-shaped leaves, with one or more erect or nodding flowers borne at the tip in spring. T. grandiflorum is a vigorous perennial forming a large clump of erect stems each carrying a whorl of three broadly ovate leaves and a solitary terminal flower to 10cm across, with three recurved white petals.