tozpatli.

an herb, something like a fern, believed to have medicinal value; it grows in warm and humid places in Tepuztlan (Tepoztlan); to alleviate pain in the stomach and constipation

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), 139–40.