Poinsett and Poinsettias

Born March 2, 1779, Joel Roberts Poinsett was a physician, botanist, diplomat, and politician. He served in the South Carolina state legislature as well as representing the state in Congress. He was very opposed to nullification and led South Carolina's Unionist efforts in the 1830s. A respected expert in Latin American affairs, Poinsett was also the first ambassador to Mexico. He was also interested in Russia and was offered a position by Tsar Alexander I, which Poinsett declined as American and England approached war in 1812. Tragically, Poinsett oversaw the Trail of Tears during the late 1830s. He is perhaps best known for introducing what was then called the Mexican flame flower or "Flor de Nochebuena" (Christmas Eve flower) to the U.S. The plant soon became known as the poinsettia. I've read that the indigenous name of the plant is Cuetlaxochitl (kweh-tla-SO-cheetl). Should the plant be called that, rather than by the surname of an Anglo slaveowner?