Synopsis Cryptogamiae Americae Borealis, circa 1800-1833

There are 19 numbered file folders containing manuscripts written in Latin, except for certain remarks in English. One of the manuscripts is a bound journal organized chronologically from 1882. The manuscripts fall into two general categories. First, there are numbered specimen lists, titled and untitled, some with short descriptive remarks. The lists record additions to his personal herbarium, collection lists of field trips, and flora lists of other collectors. Some include an index. There are comparative lists of flora from Bethlehem, Pennsylvania and Salem, North Carolina, and lists of plants relating to his collaboration and correspondence with John Torrey.

Second are synoptic studies and systematic classifications by family, genus, and species, some of which record species discovered and identified by von Schweinitz. See, for example, Flora Synoptica Mundi (folder 3) and Tentamen Synopseos Plantarum Cryptogamarum in America Boreali (folder 4). Collection lists of other botanists include William Baldwin, William Bartram, William Cooper, Elias Fries, Andre Michaux, Kurt Sprengel, and Nathaniel Wallich.