The Rouses (Preachers, p.182) determined that this first printed edition of the Manipulus florum contains 47 entries under 16 topics that are not found in the earliest manuscripts. They suggested that these additiones were probably not inserted by the printer, Jacobus de Tyela, but rather were perpetuated by him from his unknown source manuscript.

This website provides a searchable edition of the Piacenza additiones compiled in 2007 by the editor with the assistance of Ms. Elena Crupi, an MA student in the Tri-University History Program at Wilfrid Laurier University.