The Marian Field Collection consists of four series. The first series, which constitutes most of the collection, consists of 193 pen and ink drawings of twigs of Oregon woody plants in the spring and summer. They were drawn as a Works Progress Administration (WPA) project between 1936 and 1941 for Frank Sipe, a botanist at the University of Oregon who had hoped to publish a book using the drawings. Series two consists of other artworks made by Field, and includes a painting of the mushroom, Lactarius rufus; a composite of 15 hand-colored photographs of the twig drawings, ca. 1941; and pen and ink drawings of Arctostaphylos genus twigs. Series three contains correspondence pertaining to Sipe's book project, 1936-1938, and a biographical sketch of Field done by her daughter in 1982. Series four consists of text panels from a University of Oregon exhibit of Field's drawings from about 1982.
An addition to the Marian Field Collection (Accession 2015:030) consists of illustrations of mushrooms and fungi drawn by Art Instructor Marian Field as a part of a Works Progress Administration project. The drawings were likely the product of a collaborative project with University of Oregon Botanist Frank Sipe. Field later worked with Sipe on illustrations of Oregon woody plants from 1936 to1941 for another Works Progress Administration project. Numbering 54 drawings in total, most of the illustrations are matted on paper board with the subject matter identified by both their latin and common names. Some of the drawings show different life stages of a mushroom type and contain notes on the habitat, coloration, height, and details of the painted subjects as well as where the specimen was collected. Eight photographic prints depicting mushrooms that Field used as a studies for her illustrationss were also found in this transfer.