| Hedeoma adscendens Rusby | Hedeoma mandoniana Wedd. |
| Hedeoma breviflora Griseb. | Hedeoma mandoniana Wedd. |
| Hedeoma caerulescens Benth. | Obtegomeria caerulescens (Benth.) Doroszenko & P.D.Cantino |
| Hedeoma dentata nana Torr., Rep. U.S. Mex. Bound. [Emory] 2(1): 130 (1859) | Hedeoma nana (Torr.) Briq. |
| Hedeoma drummondii reverchonii A.Gray, Syn. Fl. Amer. 2(1): 363 (1870) | Hedeoma reverchonii (A.Gray) A.Gray |
| Hedeoma lata Small | Hedeoma reverchonii (A.Gray) A.Gray |
| Hedeoma thymoides A.Gray | Hedeoma nana (Torr.) Briq. |