I am an herb plant collector. We have a lot of herb plants that reside in our basement and garage in the winter. This is a Peruvian salvia called Salvia discolor 'Andean Silver'. The blooms are black and the leaves are green with a white backing. It may be one that is dug up and placed in a pot for the winter. Not what my husband wants to hear! You can find this plant at Companion Plants and Well-Sweep Herb Farm. 
