N. L.  Britton and Brown, A., An illustrated flora of the Northern United States, ed. 2. New York: Charles Scribner's Sons, 1913.

N. L.  Britton and Millspaugh, C. F., The Bahama flora. New York: Published by the authors, 1920.

N. L.  Britton and Wilson, P., Scientific survey of Porto Rico and the Virgin Islands 5: Botany of Porto Rico and the Virgin Islands. New York: Published by the academy, 1924.

N. L.  Britton and Wilson, P., Scientific survey of Porto Rico and the Virgin Islands 6 (suppl.). New York: Published by the academy, 1930.