Echinodorus tenellus (C. Mart.) Buchenau in Abh. Naturwiss. Vereine Bremen 2: 21. 1868 sec. Domínguez-Licona 2013
- =Alisma tenellum C. Mart., Syst. Veg. 7: 1600. 1830 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Alisma tenellum f. latifolia Seub., Fl. bras. 3: 195, t. 13, f. 2. 1848 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Echinodorus parvulus Engelm., Manual, ed. 2: 438. 1856 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Helanthium tenellum (C. Mart.) Britton, Manual, ed. 2: 54. 1856 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Echinodorus tenellus (C. Mart.) Buchenau var. tenellus in Abh. Naturwiss. Vereine Bremen 2: 21. 1868 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Sagittaria tenella (C. Mart.) Kuntze, Revis. gen. pl. 3: 326. 1898 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Helanthium parvulum (Engelm.) Small, N. Amer. fl. 17: 45. 1909 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Echinodorus tenellus var. latifolius (Seub.) Fassett in Rhodora 57: 202-203. 1955 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Echinodorus tenellus var. parvulus (Engelm.) Fassett in Rhodora 57: 185-186. 1955 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Echinodorus latifolius (Seub.) Rataj, Stud. Ceskoslov. Akad. Ved.: 18. 1975 syn. sec. Espejo-Serna & López-Ferrari 2008