| Poaceae | |
Gouinia barbata
| (Hack.) Swallen | Amer. J. Bot. 22: 37 | 1935 |
| Poaceae | |
Gouinia brandegeei
| (Vasey) Hitchc. | U.S.D.A. Bur. Pl. Industr. Bull. 33: 21 | 1903 |
| Poaceae | |
Gouinia brasiliensis
| (S. Moore) Swallen | Amer. J. Bot. 22: 36 | 1935 |
| Poaceae | |
Gouinia cearensis
| (Ekman) Swallen | Amer. J. Bot. 22: 39 | 1935 |
| Poaceae | |
Gouinia ekmanii
| Alain | Contr. Ocas. Mus. Hist. Nat. Colegio "De La Salle" no. 12: 5, f. 6. | 1953 |
| Poaceae | |
Gouinia gracilis
| Ekman ex Swallen | Amer. J. Bot. 22: 33, f. 1 | 1935 |
| Poaceae | ** |
Gouinia guatemalensis
| (Hack.) Swallen | Amer. J. Bot. 22: 40, 21 | 1935 |
| Poaceae | ! |
Gouinia guatemalensis
| (Hack.) Swallen | Publ. Carnegie Inst. Wash. 436: 334 | 1934 |
| Poaceae | |
Gouinia isabelensis
| Ortiz-Diaz | Acta Bot. Mex. 23: 18 | 1993 |
| Poaceae | |
Gouinia latifolia
| (Griseb.) Vasey | Contr. U.S. Natl. Herb. 1(9): 365 | 1895 |
| Poaceae | |
Gouinia longiramea
| Swallen | Publ. Carnegie Inst. Wash. 436: 334, f. 2 | 1934 |
| Poaceae | |
Gouinia mexicana
| (Scribn.) Vasey | Contr. U.S. Natl. Herb. 1(9): 365 | 1895 |
| Poaceae | |
Gouinia papillosa
| Swallen | Publ. Carnegie Inst. Wash. 436: 334, f. 3 | 1934 |
| Poaceae | |
Gouinia paraguayensis
| (Kuntze) Parodi | Revista Mus. La Plata 34: 192, 176 | 1934 |
| Poaceae | ! |
Gouinia polygama
| E. Fourn. | Mexic. Pl. 2: 103 | 1886 |
| Poaceae | ** |
Gouinia polygama
| E. Fourn. ex Hemsl. | Biol. Cent.-Amer., Bot. 3: 581 | 1885 |
| Poaceae | |
Gouinia ramosa
| Swallen | Publ. Carnegie Inst. Wash. 436: 333, f. 1 | 1934 |
| Poaceae | |
Gouinia tortuosa
| Swallen | Amer. J. Bot. 22: 41 | 1935 |
| Poaceae | |
Gouinia virgata
| (J. Presl) Scribn. | Bull. Div. Agrostol., U.S.D.A. 4: 10 | 1897 |