Abbreviation G.Gaertn. used because of information from S. Dressler that he was known as Gottfried Gaertner during his lifetime. According to a Walloonian custom the name Philipp, his father's name, was added after death. Another possible explanation is from Dr K.P. Buttler who points out that the death notice in Flora, 1826(1): 32 states: "...starb zu Hanau Hr. Dr. Phil. Gottfried Gartner." where 'Phil.' may have been interpreted as Philipp.
Example of Name Published
Bifolium G. Gaertn., B. Mey. & Scherb., Oekon. Fl. Wetterau, 1: 175 (1799).