http://www.mgonlinestore.com/toreg/TropicalOregano01.jpg
A variegated form of Plectranthus amboinicus.
Cuban oregano (Plectranthus amboinicus) is an herb of ambiguous origin and many names. Mexican mint, Spanish thyme, and Indian borage are just a few; some people even call it "Vicks plant," because its camphor and menthol aroma is similar to the cough salve.
Read more here:
http://gardeningsolutions.ifas.ufl.edu/plants/edibles/vegetables/cuban-oregano.html
http://nassau.ifas.ufl.edu/horticulture/herbs/oreganocuban.html