South America, distribution of Couma species, undated

There are two boxes containing maps in a variety of formats and media. Most of the maps are housed in file folders and are of photographic quality (glossy and matte) or of paper and board. There are 13 oversize maps, both published and hand-drawn. Subjects include travel routes, encampments, forest and agricultural zones, topography, and physical and national boundaries. Several are marked and annotated. Most are country maps, especially of Southeast Asia and South America; there are regional and local maps as well. Notable maps describe botanical areas studied by Dr. Williams, travel routes in the Orinoco and Peruvian Amazon River basins, and a wide variety of forest and agricultural zones and types in Thailand. There is one composite aeronautical chart of the Isthmus of Tehuantepec, Mexico. Negatives of photo-quality maps (and smaller photo maps) are located in Series 6: Photographic Material. The collection complements and supports botanical and expedition information of Series 2: Manuscripts & Typescripts, and Series 3: Research Papers.

Arranged alphabetically or by assigned number.