nanahuacuahuitl.

the "Bubo Tree," a tall tree with medicinal value; the decoction, "when drunk copiously in the morning, cures the French disease" (syphillis) (Valley of Mexico, 1570–1587)
The Mexican Treasury: The Writings of Dr. Francisco Hernández, ed. Simon Varey, transl. Rafael Chabrán, Cynthia L. Chamberlin, and Simon Varey (Stanford: Stanford University Press, 2000), 122.