Devil's Backbone 'Nana'
This plant is a Pedilanthus tithymaloides nana (common names include Devil's backbone, and Jacob's Ladder to name a few). It is a more petite version of the Pedilanthus tithymaloides. Nana is a term in botany that is derived from the Latin word nanus (dwarf) meaning 'dwarf or small.' Nana can be found as a cultivar (or variety) for many different kinds of plants - even aquatic ones!