According to a Google search, it appears that San Kao has
something to do with beef noodles.
These 2010 photos come from the
Ralph (Herb) and Dorothy Benedict Hosta Hillside, tours and vendors at the 2010
American Hosta Society National Convention in Minnesota,
Wade and Gatton Nursery and Wade Botanical Gardens,
Toledo Botanical Garden and the
Minnesota Landscape Arboretum.