Divide and conquer in the garden

In April 2012 I bought two pots of these colorful foliage plants. I wish I could remember the name of the plant right now but I can't...Anyhoo, at that time I divided the two full pots into about 15 or so plants. They've had all summer to grow and multiply so today I divided three of the established plants and now have a total of 24. Tomorrow I'm gonna divide more into the other garden. What a deal. :)

See the larger plant. In the back? I have many more outside of photo range that are my future dividing targets.