| Alismataceae | |
Sagittaria subulata var. gracillima
| (S. Watson) J.G. Sm. | Mem. Torrey Bot. Club 5(3): 26 | 1894 |
| Alismataceae | |
Sagittaria subulata var. kurziana
| (Glück) Bogin | Mem. New York Bot. Gard. 9(2): 205 | 1955 |
| Alismataceae | |
Sagittaria subulata subsp. lorata
| (Chapm.) R.T. Clausen | Torreya 41(5): 161 | 1941 |
| Alismataceae | |
Sagittaria subulata var. lorata
| (Chapm.) Fernald | Rhodora 42(502): 409 | 1940 |
| Alismataceae | |
Sagittaria subulata var. natans
| J.G. Sm. | N. Amer. Sagittaria 18 | 1894 |
| Alismataceae | |
Sagittaria subulata var. pusilla
| (Nutt.) Buchenau | Pflanzenr. IV 15(Heft 16): 58 | 1903 |
| Alismataceae | |
Sagittaria subulata subsp. subulata
| | | |
| Alismataceae | |
Sagittaria subulata var. subulata
| | | |
| Alismataceae | ** |
Sagittaria subulata var. typica
| Fernald | Rhodora 42(502): 408 | 1940 |