I planted 3 cultivars of Winter iris last spring. Also known as Algerian Iris and Iris unguicularis.
Its quite nice to see them blooming today on Christmas Eve. Actually 1 or another of the cultivars seems to be blooming each week in rotation. They are supposed to grow into nice clumps after a few years, so am looking forward to watching them spread out some more.
The three blooming now are Mary Barnard's I believe.