a tree with medicinal value; its flowers open at night, hence its name, "Nocturnal Flower;" also called cozcaquahuitl and yahoalxochitl ("round flower") (Valley of Mexico, 1570–1587)
"applied in the form of a plaster it resolves tumors, or matures and opens them; it provokes sweat in some who are drunk, and in others it moves the bowel; a powder made from it gives shape to incurable wounds and cleans them; it cures scabies and leprosy and is a great remedy for tetanus and for women seized with fits of the mother." (Central Mexico, 1571–1615)