Veronicastrum virginicum, also known as  Culver's Root, is a dazzling native wildflower, growing from three to five feet tall, with whorled leaves and densely packed white, pale pink, or even lavender flowered spikes.  Native to moist meadows, thickets, and woods across the country, Veronicastrum virginicum will look just as at home in your own woodland or perennial garden.  Try Culver's Root at the back of a border where it will add a splash of white and a whole lot of architecture.  Sun.  Zones 3-8.  Quarts.