Heteranthera dubia (Jacq.) MacMill., Metasp. Minnesota valley: 138. 1892 sec. Olvera & Lot 2013
- ≡Commelina dubia Jacq., Obs. Bot. 3: 9. t. 59. 1768 syn. sec. Davidse, G. D., Sousa Sánchez, M., Knapp, S. & Chiang Cabrera, F. (Eds.) 1996
- ≡Phrynium dubium (Jacq.) Farw., Pap. Michigan Acad. Sci. 3: 92. 1924 ["1923"] syn. sec. Olvera & Lot 2013
- =Schollera graminifolia Willd. in Ges. Naturf. Freunde Berlin Neue Schriften 3: 438. 1801 syn. sec. POWO 2019
- =Leptanthus gramineus Michx., Fl. Bor.-Amer. 1: 25, t. 5, f. 2. 1803 syn. sec. POWO 2019
- =Heteranthera graminea (Michx.) Vahl, Enum. pl. 2: 45. 1806 syn. sec. POWO 2019
- =Schollera graminea (Michx.) A. Gray, Manual: 511. 1848 syn. sec. POWO 2019
- =Potamogeton liebmannii Buchenau in Abh. Naturwiss Vereine Bremen 3: 249. 1873 syn. sec. POWO 2019
- =Schollera dubia (Jacq.) Kuntze, Revis. gen. pl. 2: 719. 1891 syn. sec. POWO 2019
- =Zosterella dubia (Jacq.) Small, Fl. Lancaster co.: 319. 1913 syn. sec. Davidse, G. D., Sousa Sánchez, M., Knapp, S. & Chiang Cabrera, F. (Eds.) 1996
- =Phrynium dubium (Jacq.) Farw. in Pap. Michigan Acad. Sci. 3: 92. 1924 syn. sec. POWO 2019
- =Phrynium dubium var. terrestre Farw. in Pap. Michigan Acad. Sci. 3: 92. 1924 syn. sec. POWO 2019
- =Heteranthera dubia f. terrestris (Farw.) Vict. in Contr. Lab. Bot. Univ. Montreal 14: 32. 1929 syn. sec. POWO 2019
- =Zosterella longituba Alexander, N. amer. fl. 19: 52. 1937 syn. sec. POWO 2019
- =Heteranthera liebmannii (Buchenau ex Magnus) Shinners in Field & Lab. 23: 21. 1955 syn. sec. POWO 2019