cuauhiyac.

Headword: 
cuauhiyac.
Principal English Translation: 

a large tree whose leaves are like those of the citron, but sharply pointed; grows in Ocuila; medicinal value (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), 123.

Orthographic Variants: 
quauhiyac
Attestations from sources in English: 

"It stops up diarrhea and provokes sweat. Its juice, instilled in the nostrils, causes one to sneeze violently; and in this way it purges the head, getting rid of pains, and heals calentures." (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), 123.

themes: 
Health, Sickness, Wellness, Medicine
Plants, Trees, Flora