In Eyes for Consuela, based on Octavio Paz’s classic story “The Blue Bouquet,” a vacationing American encounters a knife-toting Mexican bandit on a gruesome quest. And in When the World Was Green, cowritten with Joseph Chaikin, a journalist in search of her father interviews an old man who resolved a generations-old vendetta by murdering the wrong man. Together, these plays form a powerful trio from an enduring force in American theater.