The collection consists of William ("Robbie") Robinson's papers. In addition to Robinson's own personal correspondence, clippings, and photographs, the collection includes newsletters and other publications relating to the Neal family, to whom Robinson was related. A significant portion of the collection consists of records, photographs, and publications relating to the Japanese Garden of Portland, Oregon, the American Rhododendron Society, and other gardens and gardening organizations. The collection also includes a number of nursery catalogs.