Brown University (BRU) (7,214)
Duke University (DUKE) (13,835)
Indiana University (IND) (5,503)
Michigan State University (MSC) (16,421)
Missouri Botanical Garden (MO) (227,100)
New York Botanical Garden (NY-) (227,084)
University and Jepson Herbaria (UC) (128,405)
University of Alaska (ALA) (8,345)
University of Michigan (MICH-) (89,429)
University of Michigan (UMMP) (3,982)
University of Minnesota (MIN) (18,875)
The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.