Veronicastrum virginicum (
Culver's root,
Culver's-root,
Culverphysic,
Culver's physic,
Bowman's root,
black root;
syn. Leptandra virginica (L.) Nutt.,
Veronica virginica L.) is a
wildflower native to the
United States from southern Maine to northwest Florida to northern Louisiana up through Minnesota and going over the Canadian border a little bit; good for USDA zones of 3 to 8.