Poinsettia: What are the Origins of The Christmas Plant?

No flower says Christmas like the poinsettia, but do you ever wonder where the beautiful perennial got its start? The Poinsettia was a very important plant to the Aztecs in the 14th to 16th century, but back then it was known as the 'Cuetlaxochitl,' meaning 'flower that grows in residues or soil.'