totoncaxoxocoyollin.

an herb, also called atehuapatli (medicine which grows by water); grows in mountainous and rocky places in temperate climates; when crushed and infused with alcohol it was believed to clean the intestines, release "detained semen," benefit inflamed eyes, and provoke urine

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), 140.