Biographies of American Seedsmen and Nurserymen Ilgenfritz, I. E.–Monroe, Michigan; St. Clair Shores, Michigan; Detroit, Michigan; Toledo, Ohio–came to Michigan from New York and brought fruit tree stock.  In 1947, the Monroe Nursery celebrated its centennial, it was one of Michigan’s first large-scale commercial nurseries still operated by the family.
Sources: cat.-021707