michcuitlaxcolli.

an herb, also called "Fish Guts," that grows in the region of Pánuco; the roots were used for a poultice; also ground and drunk to cure jaundice and provoke urine, or powdered for application to growths on the eyes; other applications as well
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), 147.