Somebody posting above wrote about a "rye smile." Was this what you were thinking of?

When Linnda Caporael began nosing into the Salem witch trials as a college student in the early 1970s, she had no idea that a common grain fungus might be responsible for the terrible events of 1692. But then the pieces began to fall into place. Caporael, now a behavioral psychologist at New York's Rensselaer Polytechnic Institute, soon noticed a link between the strange symptoms reported by Salem's accusers, chiefly eight young women, and the hallucinogenic effects of drugs like LSD. LSD is a derivative of ergot, a fungus that affects rye grain. Ergotism — ergot poisoning — had indeed been implicated in other outbreaks of bizarre behavior, such as the one that afflicted the small French town of Pont-Saint-Esprit in 1951

from http://www.hbci.com/~wenonah/history/ergot.htm.

Interesting site!