The file name for each photograph corresponds to the fern’s herbarium specimen number. Specimen numbers of all specimens are included in “Specimen Information” file (included as an excel file and a text file). Fern specimens used in this study came from dried herbarium specimens from the Baylor University Herbarium (USA), Queensland Herbarium (Australia), Te Papa Herbarium at the Museum of New Zealand Te Papa Tongarewa (New Zealand), United States National Herbarium (USA), and University of Waikato Herbarium (NZ) and from fresh specimens collected in central Texas, USA and dried in the Baylor Herbarium prior to analysis. Ferns were digitally photographed at each herbarium by C. Lemons. Please contact Daniel Peppe (daniel_peppe@baylor.edu) with any questions about the images or the specimen information file.