An Illustrated Flora of the Northern United States, Canada and the British Possessions from Newfoundland to the Parallel of the Southern Boundary of Virginia, and from the Atlantic Ocean Westward to the 102d Meridian (Vols. II and III)
New York: New York Botanical Garden, 1936. Hardcover. Red cloth over boards; 735 pp. (vol. II) ,637 pp. (vol. III); Profusely illustrated with bw figures. Volumes II and III only. More