This variegated Japanese selection used to be in the genus Cacalia.   Broad foliage irregularly and finely streaked and spattered in cream like a monochromatic misting by Jackson Pollock on a green canvas.  This will get to up to 30" with upright stems clad in this conversational foliage.  Forgettable flowers.  We've grown this in light shade to good effect and hardy to zone 4.