| Hilaria ciliata (Scribn.) Nash, 1912 |
| Hilaria ciliata (Scribn.) Sohns, 1956 |
| Hilaria hintonii Sohns, 1956 |
| Hilaria mutica (Buckley) Benth., 1881 |
| Hilaria rigida (Thurb.) Benth. ex Scribn., 1882 |
| Hilaria semplei Sohns, 1956 |
| Hilaria swallenii Cory, 1948 |
| Hilaria texana (Vasey) Nash, 1903 |
| Hilariinae P.M. Peterson & Columbus, 2007 |
| Hildaea C. Silva & R.P. Oliveira, 2015 |
| Hildaea nemorosa (Sw.) C. Silva & R.P. Oliveira, 2015 |
| Hildaea pallens (Sw.) C. Silva & R.P. Oliveira, 2015 |
| Hildaea pallens var. major (Nees) C. Silva & R.P. Oliveira, 2015 |
| Hildaea pallens var. pallens (Sw.) C. Silva & R.P. Oliveira, 2015 |
| Hildaea tenuis (J. Presl) C. Silva & R.P. Oliveira, 2015 |
| Hippagrostis Kuntze, 1891 |
| Hippagrostis composita (L.) Kuntze, 1891 |
| Hippagrostis loliacea (Lam.) Kuntze, 1891 |
| Hippagrostis setaria (Lam.) Kuntze, 1891 |
| Hippagrostis undulatifolia Kuntze, 1891 |