Echinodorus palaefolius (Nees & Mart.) J.F. Macbr. Echinodorus palaefolius (Nees & Mart.) J.F. Macbr. in Publ. Field Mus. Nat. Hist., Bot. Ser. 11(1): 4. 1931 sec. The Plant List 2013=Echinodorus ellipticus (Mart. ex Schult. f.) Micheli, Monogr. Phan. 3: 51. 1881 syn. sec. ???