An Illustrated Catalog of American Fruits & Nuts: The U.S. Department of Agriculture Pomological Watercolor CollectionA kaleidoscopic celebration of the USDA's pomological collection, offering an engaging, biophillic meditation upon the sweetest of the earth's produce The United States Department of Agriculture Pomological Watercolor Collection encompasses 7,497 botanical watercolor paintings of evolving fruit and nut varieties, alongside specimens introduced by USDA plant explorers from the late 19th and early 20th centuries. Assembled between 1886 and 1942, the