capolin.

The cacapolton is a small tree with leaves similar to the capulin (or capolin), but the fruit is red, then turns purple, and finally black. The leaves are used for curing tumors, diarrhea, fevers, wounds, and eye inflammation. (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.

"fruit similar in every respect to our cherries—in shape, color and size; in their seeds or pits, and in taste (except that they tend to the taste of mulberries)...The decoction of its bark, after it has been put out in the sun for fifteen days, drunk in the amount of an ounce, cures bloody diarrhea. Ground to powder, the bark removes cloudiness from the eyes, makes sight clear, and cures inflammations." (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), 126.

oyetetl caltin centetlapancali ontetl xacaltin yoan in calacuemitl ypan mani tlapalnopali yoan metl ypan onoc yoan capolime yan onoc yoan capolime = dos aposentos, los de terrado y otro de jacale, y encima de la tierra [solariega] hay nopales de grana y magueyes y árboles de capulín (San Bartolomé Tenango, 1585)
Vidas y bienes olvidados: Testamentos indígenas novohispanos, vol. 1, Testamentos en castellano del siglo XVI y en náhuatl y castellano de Ocotelulco de los siglos XVI y XVII, eds. Teresa Rojas Rabiela, Elsa Leticia Rea López, y Constantino Medina Lima (Mexico: CIESAS, 1999), 250–251.