What country in the poinsettia native to?

Poinsettias (Euphorbia pulcherrima) are native to scattered parts of Central and South America; but not N. America.

The plant itself has different names in different countries. For example in Chile, Colombia and Peru, this plant is nick-named "la crona de los andes" which means the crown of the andes.

The name poinsettia, was given (only here in the U.S. ) after it was introduced to the U.S. by a French botanist named Joel Roberts Poinsett, who brought it back from Mexico in 1828.