I wonder if this is S. densifoliata. I photographed it in an area where densifoliata has been recorded. My photo was taken on the eastern slope of the Western Cordillera at 2100m overlooking the Cauca river valley.
Well to save others time I think I have answered my own question with some more research. It most likely is not that endemic species because there are only two known populations and they occur at much lower altitude.