'Ikeda Sunbean' Japanese Roof Iris combines beautiful lavender flowers with vividly white and green striped leaves in spring. It was first introduced to the US from Japan by Barry Yinger. The longitudinally striped leaves are most striking in the spring, with very broad ivory stripes contrasting with the green stripes. The 18" lavender flowers appear above the foliage, but are taller and showier than their American relative, Iris cristata. As the summer heats up, the white fades to uniform green, but the foliage persists well into the early winter.