This collection consists of 3 pencil drawings by Joseph Whitfield, accompanied by two handwritten manuscripts by Thomas Nuttall, published in the Journal of the Academy of Natural Sciences of Philadelphia. Each drawing measures 25 x 14 cm. The subject of the drawings and manuscripts are 3 plants: Selenia aurea and Streptanthus maculatus, which were two species Nuttall had collected in the Arkansas territory; and Anemone nuttallii, which he had collected in 1811 near the confluence of the Missouri and Platte Rivers and northward. This plant ultimately proved to be a variety of Linnaeus's A. patans, viz. var. wolfangiana.

The drawings of Selenia and Streptanthus are accompanied by a three-paged, double sided, hand written paper titled: "Descriptions of two new genera of the Natural Order of the Cruciferae - by Tho. Nuttall. Read October 1825." The drawing of Anemone nuttallii is accompanied by a two-paged, double sided handwritten paper titled: "Observations on a species of Anemone of the section Pulsatilla indigenous to the United States - by Tho. Nuttall. Read October 1825." Both were published in The Journal of the Academy of Natural Sciences of Philadelphia 5 (1825).