Rather than to run a column to the floor, why not use an Xtreme Beam Support. This one is 9" in diameter & about 24" long. The woods used are: walnut, cherry, curly maple, bolivian rosewood, and a touch of brazilian tulipwood. The reason I did this is to stray away from the straight-line look of columns used in normal construction. It lets the wall and beam flow together, but doesn't interrupt the wall for the length of the room. You could also coordinate room colors into the woods I would use to make them. I will produce these in any size, either out of one kind of wood or multiple woods as shown here.
Dimensions: 9 inches wide x 24 inches long