| Poaceae | |
Olmeca clarkiae
| (Davidse & R.W. Pohl) Ruiz-Sanchez, Sosa & Mejía-Saulés | Taxon 60(1): 93 | 2011 |
| Poaceae | |
Olmeca fulgor
| (Soderstr.) Ruiz-Sanchez, Sosa & Mejía-Saulés | Taxon 60(1): 93 | 2011 |
| Poaceae | ! |
Olmeca recta
| Soderstr. | Phytologia 51(2): 161 | 1982 |
| Poaceae | ** |
Olmeca recta
| Soderstr. | Amer. J. Bot. 68(10): 1365 | 1981 |
| Poaceae | ** |
Olmeca reflexa
| Soderstr. | Amer. J. Bot. 68(10): 1369 | 1981 |
| Poaceae | ! |
Olmeca reflexa
| Soderstr. | Phytologia 51(2): 161 | 1982 |
| Poaceae | |
Olmeca zapotecorum
| Ruiz-Sanchez, Sosa & Mejía-Saulés | Taxon 60(1): 93–96, f. 3 | 2011 |