This solanum is fast growing and when growing horizontally, kind of floats along the top, creating a dense mat.  It is dark green and purple, and thrives in bright light (can take lower light as well) and lots of humidity.  The leaves stay around 3/4 inch.  In the pictures above, you can see the color difference between more mature growth (green) and new growth (purple).  This plant is from Ecuador.

Available plants are cuttings of at least 12″ in length.  They will be shipped bare root.