Peperomia vana

This trailing Peperomia is a gem in the terrarium.  It has nice rotund foliage that stays about 1/4 inch, and it will creep along the substrate forming a nice mat over time.  In brighter light, the leaves and stem have more pink, and green venation is visible.  In more moderate light the foliage is a nice bright green with a nice silvery sheen and a red stem.