Middleton, B. A., E. Anemaet, T. E. Quirk, and N. P. . Tippery. “Nymphoides Humboldtiana (Menyanthaceae) in Florida (U.S.A.) Verified by DNA Data”. Journal of the Botanical Research Institute of Texas, vol. 12, no. 1, July 2018, pp. 257-63, doi:10.17348/jbrit.v12.i1.934.