chillapatli.

"A shrub with a fibrous root...The flowers [are] scarlet...When a fistful of the leaves is taken with chilatolli, they say it has admirable effects if it is given to the people suffering from quartan fevers, {for} it gets rid of them right away." (Central Mexico, 1571–1615)
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), 128.